33 results on '"Petkova, Eva"'
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2. Efficacy and Safety of COVID-19 Convalescent Plasma in Hospitalized Patients: A Randomized Clinical Trial
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Ortigoza, Mila B., Yoon, Hyunah, Goldfeld, Keith S., Troxel, Andrea B., Daily, Johanna P., Wu, Yinxiang, Li, Yi, Wu, Danni, Cobb, Gia F., Baptiste, Gillian, O’Keeffe, Mary, Corpuz, Marilou O., Ostrosky-Zeichner, Luis, Amin, Amee, Zacharioudakis, Ioannis M., Jayaweera, Dushyantha T., Wu, Yanyun, Philley, Julie V., Devine, Megan S., Desruisseaux, Mahalia S., Santin, Alessandro D., Anjan, Shweta, Mathew, Reeba, Patel, Bela, Nigo, Masayuki, Upadhyay, Rabi, Kupferman, Tania, Dentino, Andrew N., Nanchal, Rahul, Merlo, Christian A., Hager, David N., Chandran, Kartik, Lai, Jonathan R., Rivera, Johanna, Bikash, Chowdhury R., Lasso, Gorka, Hilbert, Timothy P., Paroder, Monika, Asencio, Andrea A., Liu, Mengling, Petkova, Eva, Bragat, Alexander, Shaker, Reza, McPherson, David D., Sacco, Ralph L., Keller, Marla J., Grudzen, Corita R., Hochman, Judith S., Pirofski, Liise-anne, Parameswaran, Lalitha, Corcoran, Anthony T., Rohatgi, Abhinav, Wronska, Marta W., Wu, Xinyuan, Srinivasan, Ranjini, Deng, Fang-Ming, Filardo, Thomas D., Pendse, Jay, Blaser, Simone B., Whyte, Olga, Gallagher, Jacqueline M., Thomas, Ololade E., Ramos, Danibel, Sturm-Reganato, Caroline L., Fong, Charlotte C., Daus, Ivy M., Payoen, Arianne Gisselle, Chiofolo, Joseph T., Friedman, Mark T., Wu, Ding Wen, Jacobson, Jessica L., Schneider, Jeffrey G., Sarwar, Uzma N., Wang, Henry E., Huebinger, Ryan M., Dronavalli, Goutham, Bai, Yu, Grimes, Carolyn Z., Eldin, Karen W., Umana, Virginia E, Martin, Jessica G., Heath, Timothy R., Bello, Fatimah O., Ransford, Daru Lane, Laurent-Rolle, Maudry, Shenoi, Sheela V., Akide-Ndunge, Oscar Bate, Thapa, Bipin, Peterson, Jennifer L., Knauf, Kelly, Patel, Shivani U., Cheney, Laura L., Tormey, Christopher A., and Hendrickson, Jeanne E.
- Abstract
IMPORTANCE: There is clinical equipoise for COVID-19 convalescent plasma (CCP) use in patients hospitalized with COVID-19. OBJECTIVE: To determine the safety and efficacy of CCP compared with placebo in hospitalized patients with COVID-19 receiving noninvasive supplemental oxygen. DESIGN, SETTING, AND PARTICIPANTS: CONTAIN COVID-19, a randomized, double-blind, placebo-controlled trial of CCP in hospitalized adults with COVID-19, was conducted at 21 US hospitals from April 17, 2020, to March 15, 2021. The trial enrolled 941 participants who were hospitalized for 3 or less days or presented 7 or less days after symptom onset and required noninvasive oxygen supplementation. INTERVENTIONS: A unit of approximately 250 mL of CCP or equivalent volume of placebo (normal saline). MAIN OUTCOMES AND MEASURES: The primary outcome was participant scores on the 11-point World Health Organization (WHO) Ordinal Scale for Clinical Improvement on day 14 after randomization; the secondary outcome was WHO scores determined on day 28. Subgroups were analyzed with respect to age, baseline WHO score, concomitant medications, symptom duration, CCP SARS-CoV-2 titer, baseline SARS-CoV-2 serostatus, and enrollment quarter. Outcomes were analyzed using a bayesian proportional cumulative odds model. Efficacy of CCP was defined as a cumulative adjusted odds ratio (cOR) less than 1 and a clinically meaningful effect as cOR less than 0.8. RESULTS: Of 941 participants randomized (473 to placebo and 468 to CCP), 556 were men (59.1%); median age was 63 years (IQR, 52-73); 373 (39.6%) were Hispanic and 132 (14.0%) were non-Hispanic Black. The cOR for the primary outcome adjusted for site, baseline risk, WHO score, age, sex, and symptom duration was 0.94 (95% credible interval [CrI], 0.75-1.18) with posterior probability (P[cOR<1] = 72%); the cOR for the secondary adjusted outcome was 0.92 (95% CrI, 0.74-1.16; P[cOR<1] = 76%). Exploratory subgroup analyses suggested heterogeneity of treatment effect: at day 28, cORs were 0.72 (95% CrI, 0.46-1.13; P[cOR<1] = 93%) for participants enrolled in April-June 2020 and 0.65 (95% CrI, 0.41 to 1.02; P[cOR<1] = 97%) for those not receiving remdesivir and not receiving corticosteroids at randomization. Median CCP SARS-CoV-2 neutralizing titer used in April to June 2020 was 1:175 (IQR, 76-379). Any adverse events (excluding transfusion reactions) were reported for 39 (8.2%) placebo recipients and 44 (9.4%) CCP recipients (P = .57). Transfusion reactions occurred in 2 (0.4) placebo recipients and 8 (1.7) CCP recipients (P = .06). CONCLUSIONS AND RELEVANCE: In this trial, CCP did not meet the prespecified primary and secondary outcomes for CCP efficacy. However, high-titer CCP may have benefited participants early in the pandemic when remdesivir and corticosteroids were not in use. TRIAL REGISTRATION: ClinicalTrials.gov Identifier: NCT04364737
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- 2022
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3. Association of Psychiatric Disorders With Mortality Among Patients With COVID-19.
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Nemani, Katlyn, Li, Chenxiang, Olfson, Mark, Blessing, Esther M., Razavian, Narges, Chen, Ji, Petkova, Eva, and Goff, Donald C.
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COVID-19 ,MENTAL illness ,SCHIZOPHRENIA ,ADJUSTMENT disorders ,NOSOLOGY ,22Q11 deletion syndrome ,ANXIETY disorders - Abstract
Importance: To date, the association of psychiatric diagnoses with mortality in patients infected with coronavirus disease 2019 (COVID-19) has not been evaluated.Objective: To assess whether a diagnosis of a schizophrenia spectrum disorder, mood disorder, or anxiety disorder is associated with mortality in patients with COVID-19.Design, Setting, and Participants: This retrospective cohort study assessed 7348 consecutive adult patients for 45 days following laboratory-confirmed COVID-19 between March 3 and May 31, 2020, in a large academic medical system in New York. The final date of follow-up was July 15, 2020. Patients without available medical records before testing were excluded.Exposures: Patients were categorized based on the following International Statistical Classification of Diseases, Tenth Revision, Clinical Modification diagnoses before their testing date: (1) schizophrenia spectrum disorders, (2) mood disorders, and (3) anxiety disorders. Patients with these diagnoses were compared with a reference group without psychiatric disorders.Main Outcomes and Measures: Mortality, defined as death or discharge to hospice within 45 days following a positive severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) test result.Results: Of the 26 540 patients tested, 7348 tested positive for SARS-CoV-2 (mean [SD] age, 54 [18.6] years; 3891 [53.0%] women). Of eligible patients with positive test results, 75 patients (1.0%) had a history of a schizophrenia spectrum illness, 564 (7.7%) had a history of a mood disorder, and 360 (4.9%) had a history of an anxiety disorder. After adjusting for demographic and medical risk factors, a premorbid diagnosis of a schizophrenia spectrum disorder was significantly associated with mortality (odds ratio [OR], 2.67; 95% CI, 1.48-4.80). Diagnoses of mood disorders (OR, 1.14; 95% CI, 0.87-1.49) and anxiety disorders (OR, 0.96; 95% CI, 0.65-1.41) were not associated with mortality after adjustment. In comparison with other risk factors, a diagnosis of schizophrenia ranked behind only age in strength of an association with mortality.Conclusions and Relevance: In this cohort study of adults with SARS-CoV-2-positive test results in a large New York medical system, adults with a schizophrenia spectrum disorder diagnosis were associated with an increased risk for mortality, but those with mood and anxiety disorders were not associated with a risk of mortality. These results suggest that schizophrenia spectrum disorders may be a risk factor for mortality in patients with COVID-19. [ABSTRACT FROM AUTHOR]- Published
- 2021
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4. Pretreatment and early-treatment cortical thickness is associated with SSRI treatment response in major depressive disorder
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Bartlett, Elizabeth, DeLorenzo, Christine, Sharma, Priya, Yang, Jie, Zhang, Mengru, Petkova, Eva, Weissman, Myrna, McGrath, Patrick, Fava, Maurizio, Ogden, R., Kurian, Benji, Malchow, Ashley, Cooper, Crystal, Trombello, Joseph, McInnis, Melvin, Adams, Phillip, Oquendo, Maria, Pizzagalli, Diego, Trivedi, Madhukar, and Parsey, Ramin
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To date, there are no biomarkers for major depressive disorder (MDD) treatment response in clinical use. Such biomarkers could allow for individualized treatment selection, reducing time spent on ineffective treatments and the burden of MDD. In search of such a biomarker, multisite pretreatment and early-treatment (1 week into treatment) structural magnetic resonance (MR) images were acquired from 184 patients with MDD randomized to an 8-week trial of the selective serotonin reuptake inhibitor (SSRI) sertraline or placebo. This study represents a large, multisite, placebo-controlled effort to examine the association between pretreatment differences or early-treatment changes in cortical thickness and treatment-specific outcomes. For standardization, a novel, robust site harmonization procedure was applied to structural measures in a priori regions (rostral and caudal anterior cingulate, lateral orbitofrontal, rostral middle frontal, and hippocampus), chosen based on previously published reports. Pretreatment cortical thickness or volume did not significantly associate with SSRI response. Thickening of the rostral anterior cingulate cortex in the first week of treatment was associated with better 8-week responses to SSRI (p= 0.010). These findings indicate that frontal lobe structural alterations in the first week of treatment may be associated with long-term treatment efficacy. While these associational findings may help to elucidate the specific neural targets of SSRIs, the predictive accuracy of pretreatment or early-treatment structural alterations in classifying treatment remitters from nonremitters was limited to 63.9%. Therefore, in this large sample of adults with MDD, structural MR imaging measures were not found to be clinically translatable biomarkers of treatment response to SSRI or placebo.
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- 2018
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5. Treatment Preferences of Psychotherapy Patients With Chronic PTSD.
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Markowitz, John C., Meehan, Kevin B., Petkova, Eva, Yihong Zhao, Van Meter, Page E., Neria, Yuval, Pessin, Hayley, and Nazia, Yasmin
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- 2016
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6. Neurophysiological Effects of Bitopertin in Schizophrenia
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Kantrowitz, Joshua T., Nolan, Karen A., Epstein, Michael L., Lehrfeld, Nayla, Shope, Constance, Petkova, Eva, and Javitt, Daniel C.
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Supplemental digital content is available in the text.
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- 2017
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7. Statistical analysis plan for stage 1 EMBARC (Establishing Moderators and Biosignatures of Antidepressant Response for Clinical Care) study
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Petkova, Eva, Ogden, R. Todd, Tarpey, Thaddeus, Ciarleglio, Adam, Jiang, Bei, Su, Zhe, Carmody, Thomas, Adams, Philip, Kraemer, Helena C., Grannemann, Bruce D., Oquendo, Maria A., Parsey, Ramin, Weissman, Myrna, McGrath, Patrick J., Fava, Maurizio, and Trivedi, Madhukar H.
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Antidepressant medications are commonly used to treat depression, but only about 30% of patients reach remission with any single first-step antidepressant. If the first-step treatment fails, response and remission rates at subsequent steps are even more limited. The literature on biomarkers for treatment response is largely based on secondary analyses of studies designed to answer primary questions of efficacy, rather than on a planned systematic evaluation of biomarkers for treatment decision. The lack of evidence-based knowledge to guide treatment decisions for patients with depression has lead to the recognition that specially designed studies with the primary objective being to discover biosignatures for optimizing treatment decisions are necessary. Establishing Moderators and Biosignatures of Antidepressant Response in Clinical Care (EMBARC) is one such discovery study. Stage 1 of EMBARC is a randomized placebo controlled clinical trial of 8 week duration. A wide array of patient characteristics is collected at baseline, including assessments of brain structure, function and connectivity along with electrophysiological, biological, behavioral and clinical features. This paper reports on the data analytic strategy for discovering biosignatures for treatment response based on Stage 1 of EMBARC.
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- 2017
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8. Short-term test–retest reliability of resting state fMRI metrics in children with and without attention-deficit/hyperactivity disorder.
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Somandepalli, Krishna, Kelly, Clare, Reiss, Philip T., Zuo, Xi-Nian, Craddock, R.C., Yan, Chao-Gan, Petkova, Eva, Castellanos, F.X., Milham, Michael P., and Di Martino, Adriana
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To date, only one study has examined test–retest reliability of resting state fMRI (R-fMRI) in children, none in clinical developing groups. Here, we assessed short-term test–retest reliability in a sample of 46 children (11–17.9 years) with attention-deficit/hyperactivity disorder (ADHD) and 57 typically developing children (TDC). Our primary test–retest reliability measure was the intraclass correlation coefficient (ICC), quantified for a range of R-fMRI metrics. We aimed to (1) survey reliability within and across diagnostic groups, and (2) compare voxel-wise ICC between groups. We found moderate-to-high ICC across all children and within groups, with higher-order functional networks showing greater ICC. Nearly all R-fMRI metrics exhibited significantly higher ICC in TDC than in children with ADHD for one or more regions. In particular, posterior cingulate and ventral precuneus exhibited group differences in ICC across multiple measures. In the context of overall moderate-to-high test–retest reliability in children, regional differences in ICC related to diagnostic groups likely reflect the underlying pathophysiology for ADHD. Our currently limited understanding of the factors contributing to inter- and intra-subject variability in ADHD underscores the need for large initiatives aimed at examining their impact on test–retest reliability in both clinical and developing populations. [ABSTRACT FROM AUTHOR]
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- 2015
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9. Effects of ParentCorps in Prekindergarten on Child Mental Health and Academic Performance: Follow-up of a Randomized Clinical Trial Through 8 Years of Age
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Brotman, Laurie Miller, Dawson-McClure, Spring, Kamboukos, Dimitra, Huang, Keng-Yen, Calzada, Esther J., Goldfeld, Keith, and Petkova, Eva
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IMPORTANCE: Low-income minority children living in urban neighborhoods are at high risk for mental health problems and underachievement. ParentCorps, a family-centered, school-based intervention in prekindergarten, improves parenting and school readiness (ie, self-regulation and preacademic skills) in 2 randomized clinical trials. The longer-term effect on child mental health and academic performance is not known. OBJECTIVE: To examine whether ParentCorps delivered as an enhancement to prekindergarten programs in high-poverty urban schools leads to fewer mental health problems and increased academic performance in the early elementary school years. DESIGN, SETTING, AND PARTICIPANTS: This is a 3-year follow-up study of a cluster randomized clinical trial of ParentCorps in public schools with prekindergarten programs in New York City. Ten elementary schools serving a primarily low-income, black student population were randomized in 2005, and 4 consecutive cohorts of prekindergarten students were enrolled from September 12, 2005, through December 31, 2008. We report follow-up for the 3 cohorts enrolled after the initial year of implementation. Data analysis was performed from September 1, 2014, to December 31, 2015. INTERVENTIONS: ParentCorps included professional development for prekindergarten and kindergarten teachers and a program for parents and prekindergarten students (13 two-hour group sessions delivered after school by teachers and mental health professionals). MAIN OUTCOMES AND MEASURES: Annual teacher ratings of mental health problems and academic performance and standardized tests of academic achievement in kindergarten and second grade by testers masked to the intervention or control group randomization. RESULTS: A total of 1050 children (4 years old; 518 boys [49.3%] and 532 girls [50.7%]) in 99 prekindergarten classrooms participated in the trial (88.1% of the prekindergarten population), with 792 students enrolled from 2006 to 2008. Most families in the follow-up study (421 [69.6%]) were low income; 680 (85.9%) identified as non-Latino black, 78 (9.8%) as Latino, and 34 (4.3%) as other. Relative to their peers in prekindergarten programs, children in ParentCorps-enhanced prekindergarten programs had lower levels of mental health problems (Cohen d = 0.44; 95% CI, 0.08-0.81) and higher teacher-rated academic performance (Cohen d = 0.21; 95% CI, 0.02-0.39) in second grade. CONCLUSIONS AND RELEVANCE: Intervention in prekindergarten led to better mental health and academic performance 3 years later. Family-centered early intervention has the potential to prevent problems and reduce disparities for low-income minority children. TRIAL REGISTRATION: clinicaltrials.gov Identifier: NCT01670227
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- 2016
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10. Hippocampal volume and integrity as predictors of cognitive decline in intact elderly
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Bruno, Davide, Ciarleglio, Adam, Grothe, Michel J., Nierenberg, Jay, Bachman, Alvin H., Teipel, Stefan J., Petkova, Eva, Ardekani, Babak A., and Pomara, Nunzio
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The risk of Alzheimer’s disease can be predicted by volumetric analyses of MRI data in the medial temporal lobe. The present study compared a volumetric measurement of the hippocampus with a novel measure of hippocampal integrity (HI) derived from the ratio of parenchyma volume over total volume. Participants were cognitively intact and aged 60 years or older at baseline, and were tested twice, roughly 3 years apart. Participants had been recruited for a study on late-life major depression (LLMD) and were evenly split between depressed patients and controls. Linear regression models were applied to the data with a cognitive composite score as the outcome, and HI and volume, together or separately, as predictors. Subsequent cognitive performance was predicted well by models that included an interaction between HI and LLMD status, such that lower HI scores predicted more cognitive decline in depressed patients. More research is needed, but tentative results from this study appear to suggest that the newly introduced measure HI is an effective tool for the purpose of predicting future changes in general cognitive ability, and especially so in individuals with LLMD.
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- 2016
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11. Auditory tasks for assessment of sensory function and affective prosody in schizophrenia.
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Petkova, Eva, Feihan Lu, Kantrowitz, Joshua, Sanchez, Jamie L., Lehrfeld, Jonathan, Scaramello, Nayla, Silipo, Gail, DiCostanza, Joanna, Ross, Marina, Zhe Su, Javitt, Daniel C., and Butler, Pamela D.
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Schizophrenia patients exhibit impairments in auditory-based social cognition, indicated by deficits in detection of prosody, such as affective prosody and basic pitch perception. However, little is known about the psychometric properties of behavioral tests used to assess these functions. The goal of this paper is to characterize the properties of prosody and pitch perception tasks and to investigate whether they can be shortened. The pitch perception test evaluated is a tone-matching task developed by Javitt and colleagues (J-TMT). The prosody test evaluated is the auditory emotion recognition task developed by Juslin and Laukka (JL-AER). The sample includes 124 schizophrenia patients (SZ) and 131 healthy controls (HC). Properties, including facility and discrimination, of each item were assessed. Effects of item characteristics (e.g., emotion) were also evaluated. Shortened versions of the tests are proposed based on facility, discrimination, and/or ability of item characteristics to discriminate between patients and controls. Test-retest reliability is high for patients and controls for both the original and short forms of the J-TMT and JL-AER. Thus, the original as well as short forms of the J-TMT and JL-AER are suggested for inclusion in clinical trials of social cognitive and perceptual treatments. The development of short forms further increases the utility of these auditory tasks in clinical trials and clinical practice. The large SZ vs. HC differences reported here also highlight the profound nature of auditory deficits and a need for remediation. [ABSTRACT FROM AUTHOR]
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- 2014
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12. D-serine for the treatment of negative symptoms in individuals at clinical high risk of schizophrenia: a pilot, double-blind, placebo-controlled, randomised parallel group mechanistic proof-of-concept trial
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Kantrowitz, Joshua T, Woods, Scott W, Petkova, Eva, Cornblatt, Barbara, Corcoran, Cheryl M, Chen, Huaihou, Silipo, Gail, and Javitt, Daniel C
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Antagonists of N-methyl-D-aspartate-type glutamate receptors (NMDAR) induce symptoms that closely resemble those of schizophrenia, including negative symptoms. D-serine is a naturally occurring NMDAR modulator that reverses the effects of NMDAR antagonists in animal models of schizophrenia. D-serine effects have been assessed previously for treatment of established schizophrenia, but not in the early stages of the disorder. We aimed to assess effects of D-serine on negative symptoms in at risk individuals.
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- 2015
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13. Remediating Organizational Functioning in Children With ADHD: Immediate and Long-Term Effects From a Randomized Controlled Trial.
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Abikoff, Howard, Gallagher, Richard, Wells, Karen C., Murray, Desiree W., Lei Huang, Feihan Lu, and Petkova, Eva
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CHILDREN with attention-deficit hyperactivity disorder ,ATTENTION-deficit hyperactivity disorder ,TIME management ,PERSONAL information management ,SELF-management (Psychology) - Abstract
Objective: The study compared the efficacy of 2 behavioral interventions to ameliorate organization, time management, and planning (OTMP) difficulties in 3rd- to 5th-grade children with attention-deficit/ hyperactivity disorder (ADHD). Method: In a dual-site randomized controlled trial, 158 children were assigned to organizational skills training (OST; N = 64); PATHKO, a performance-based intervention that precluded skills training (N = 61); or a wait-list control (WL, N = 33). Treatments were 20 individual clinic-based sessions over 10-12 weeks. OST involved skills building provided primarily to the child. PATHKO trained parents and teachers to reinforce children contingently for meeting end-point target goals. Primary outcomes were the Children's Organizational Skills Scales (COSS-Parent, COSS- Teacher). Other relevant functional outcomes were assessed. Percentage of participants no longer meeting inclusion criteria for OTMP impairments informed on clinical significance. Assessments occurred at post-treatment, 1-month post-treatment, and twice in the following school year. Results: OST was superior to WL on the COSS-P (Cohen's d = 2.77; p < .0001), COSS-T (d = 1.18; p < .0001), children's COSS self-ratings, academic performance and proficiency, homework, and family functioning. OST was significantly better than PATHKO only on the COSS-P (d = 0.63; p < .005). PATHKO was superior to WL on most outcomes but not on academic proficiency. Sixty percent of OST and PATHKO participants versus 3% of controls no longer met OTMP inclusion criteria. Significant maintenance effects were found for both treatments. Conclusions: Two distinct treatments targeting OTMP problems in children with ADHD generated robust, sustained functional improvements. The interventions show promise of clinical utility in children with ADHD and organizational deficits. [ABSTRACT FROM AUTHOR]
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- 2013
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14. The impact of comorbid dysthymic disorder on outcome in personality disorders.
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Hellerstein, David J., Skodol, Andrew E., Petkova, Eva, Xie, Hui, Markowitz, John C., Yen, Shirley, Gunderson, John, Grilo, Carlos, Daversa, Maria T., and McGlashan, Thomas H.
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Objective: The goal of our study was to investigate the impact of dysthymic disorder (DD), a form of chronic depression, on naturalistic outcome in individuals with personality disorders (PDs). Method: The Collaborative Longitudinal Personality Disorders Study is a cohort initially including 573 subjects with 4 targeted PDs (borderline, avoidant, schizotypal, and obsessive-compulsive) and 95 subjects with major depression but no PD. At baseline, 115 subjects were diagnosed with coexisting DD, of whom 109 (94.8%) were PD subjects. Regression analyses were performed to predict 3 classes of broad clinical outcome after 2 years of prospective follow-up. We hypothesized that DD diagnosis at baseline would be associated with worse outcome on (1) persistence of a PD diagnosis, (2) impairment in psychosocial functioning (as measured by the Longitudinal Interval Follow-up Evaluation), and (3) crisis-related treatment utilization. Results: Baseline DD diagnosis was associated with persistence of PD diagnosis at 2 years, particularly for borderline and avoidant PDs. It was associated with worse outcome on global social adjustment, life satisfaction, recreation, and friendships, but not employment or relationship with spouse. Contrary to expectation, DD did not increase suicide attempts, emergency room visits, or psychiatric hospitalizations. Conclusions: Comorbidity of DD is associated with persistence of PD diagnosis and with worse outcome on many, but not all, measures of psychosocial functioning. [Copyright &y& Elsevier]
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- 2010
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15. Longitudinal comparison of depressive personality disorder and dysthymic disorder.
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Markowitz, John C., Skodol, Andrew E., Petkova, Eva, Hui Xie, Jianfeng Cheng, Hellerstein, David J., Gunderson, John G., Sanislow, Charles A., Grilo, Carlos M., and McGlashan, Thomas H.
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Background: Few studies have compared the related diagnostic constructs of depressive personality disorder (DPD) and dysthymic disorder (DD). The authors attempted to replicate findings of Klein and Shih in longitudinally followed patients with personality disorder or major depressive disorder (MDD) in the Collaborative Longitudinal Personality Disorders Study. Methods: Subjects (N = 665) were evaluated at baseline and over 2 years (n = 546) by reliably trained clinical interviewers using semistructured interviews and self-report personality questionnaires. Results: Only 44 subjects (24.6% of 179 DPD and 49.4% of 89 early-onset dysthymic subjects) met criteria for both disorders at baseline. Depressive personality disorder was associated with increased comorbidity of some axis I anxiety disorders and other axis II diagnoses, particularly avoidant (71.5%) and borderline (55.9%) personality disorders. Depressive personality disorder was associated with low positive and high negative affectivity on dimensional measures of temperament. Depressive personality disorder subjects had lower likelihood of remission of baseline MDD at 2-year follow-up, whereas DD subjects did not. The DPD diagnosis appeared unstable over 2 years of follow-up, as only 31% (n = 47) of 154 subjects who had DPD at baseline and also had follow-up assessment met criteria on blind retesting. Limitations: Results from this sample may not generalize to other populations. Conclusions: Depressive personality disorder and dysthymic disorder appear to be related but differ in diagnostic constructs. Its moderating effect on MDD and predicted relationship to measures of temperament support the validity of DPD, but its diagnostic instability raises questions about its course, utility, and measurement. [ABSTRACT FROM AUTHOR]
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- 2005
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16. Predicting multiscan MRI outcomes in children with neurodevelopmental conditions following MRI simulator training.
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Simhal, Anish K., Filho, José O.A., Segura, Patricia, Cloud, Jessica, Petkova, Eva, Gallagher, Richard, Castellanos, F. Xavier, Colcombe, Stan, Milham, Michael P., and Di Martino, Adriana
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Pediatric brain imaging holds significant promise for understanding neurodevelopment. However, the requirement to remain still inside a noisy, enclosed scanner remains a challenge. Verbal or visual descriptions of the process, and/or practice in MRI simulators are the norm in preparing children. Yet, the factors predictive of successfully obtaining neuroimaging data remain unclear. We examined data from 250 children (6–12 years, 197 males) with autism and/or attention-deficit/hyperactivity disorder. Children completed systematic MRI simulator training aimed to habituate to the scanner environment and minimize head motion. An MRI session comprised multiple structural, resting-state, task and diffusion scans. Of the 201 children passing simulator training and attempting scanning, nearly all (94%) successfully completed the first structural scan in the sequence, and 88% also completed the following functional scan. The number of successful scans decreased as the sequence progressed. Multivariate analyses revealed that age was the strongest predictor of successful scans in the session, with younger children having lower success rates. After age, sensorimotor atypicalities contributed most to prediction. Results provide insights on factors to consider in designing pediatric brain imaging protocols. [ABSTRACT FROM AUTHOR]
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- 2021
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17. A Reappraisal of the U.S. Clinical Trials of Post-Treatment Lyme Disease Syndrome
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Fallon, Brian A, Petkova, Eva, Keilp, John G, and Britton, Carolyn B
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Methods:The methods and results of the 4 U.S. treatment trials are described and their critiques evaluated.Results:2 of the 4 U.S. treatment trials demonstrated efficacy of IV ceftriaxone on primary and/or secondary outcome measures.Conclusions:Future treatment guidelines should clarify that efficacy of IV ceftriaxone for post-treatment Lyme fatigue was demonstrated in one RCT and supported by a second RCT, but that its use was not recommended primarily due to adverse events stemming from the IV route of treatment. While repeated IV antibiotic therapy can be effective, safer modes of delivery are needed.Four federally funded randomized placebo-controlled treatment trials of post-treatment Lyme syndrome in the United States have been conducted. Most international treatment guidelines summarize these trials as having shown no acute or sustained benefit to repeated antibiotic therapy. The goal of this paper is to determine whether this summary con-clusion is supported by the evidence.
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- 2012
18. Mentoring in Psychiatric Residency Programs: A Survey of Chief Residents
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DeFrancisci Lis, Lea, Wood, William, Petkova, Eva, and Shatkin, Jess
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Mentorship is an important component of graduate education. This study assessed the perceptions of general psychiatry chief residents regarding the adequacy of mentorship provided during training. The authors surveyed 229 chief residents participating in the APA National Chief Residents Leadership Program in 2004 and 2005. The survey assessed domains such as work hours, didactics, home and family life, and mentorship. Of the chief psychiatric residents surveyed, 49% reported that they did not have a clearly defined career development mentor, and 39% reported that they did not feel adequately mentored. Gender, race/ethnicity, marital status, moonlighting, medical school (American versus international), and type of residency program (academic versus community based) did not show significant association with either “having a clearly defined mentor” or “feeling adequately mentored,” based on chisquared tests for independence. Chief residents who had authored peer-reviewed publications were significantly more likely to report having a clearly defined mentor and to feel adequately mentored than those who did not author publications. Logistic regression analysis showed that having a clearly defined mentor was associated with twice the odds for feeling well prepared to practice psychiatry upon graduation compared with those who did not have a clearly defined mentor, even after controlling for gender, race, medical school, and residency program type. Half of the psychiatric chief residents surveyed reported the lack of a clearly defined career development mentor. In addition, a chief resident’s response of lacking a clear mentor was associated with the perception of being less prepared to practice psychiatry upon graduation. Psychiatric residency training programs may benefit from further clarification and implementation of effective mentorship programs.
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- 2009
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19. A Double-Masked, Placebo-Controlled Study of Fluoxetine for Hypochondriasis
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Fallon, Brian A., Petkova, Eva, Skritskaya, Natalia, Sanchez-Lacay, Arturo, Schneier, Franklin, Vermes, Donna, Cheng, Jianfeng, and Liebowitz, Michael R.
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This study assessed the efficacy, durability, and tolerability of fluoxetine for hypochondriasis, a disorder for which controlled pharmacological trials are scarce.
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- 2008
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20. Cognitive Behavioral Therapy and Fluoxetine as Adjuncts to Group Behavioral Therapy for Binge Eating Disorder
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Devlin, Michael J., Goldfein, Juli A., Petkova, Eva, Jiang, Huiping, Raizman, Pamela S., Wolk, Sara, Mayer, Laurel, Carino, Janel, Bellace, Dara, Kamenetz, Claudia, Dobrow, Ilyse, and Walsh, B. Timothy
- Abstract
Objective: Although binge eating disorder is a common and distressing concomitant of obesity, it has not yet been established whether affected individuals presenting to behavioral weight control programs should receive specialized treatments to supplement standard treatment. This study was designed to examine the added benefit of two adjunctive interventions, individual cognitive behavioral therapy (CBT) and fluoxetine, offered in the context of group behavioral weight control treatment. Research Methods and Procedures: One hundred sixteen overweight/obese women and men with binge eating disorder were all assigned to receive a 16‐session group behavioral weight control treatment over 20 weeks. Simultaneously, subjects were randomly assigned to receive CBT + fluoxetine, CBT + placebo, fluoxetine, or placebo in a two‐by‐two factorial design. Outcome measures, assessed at the end of the 16‐session acute treatment phase, included binge frequency, weight, and measures of eating‐related and general psychopathology. Results: Overall, subjects showed substantial improvement in binge eating and both general and eating‐related psychopathology, but little weight loss. Subjects who received individual CBT improved more in binge frequency than did those not receiving CBT (p< 0.001), and binge abstinence was significantly more common in subjects receiving CBT vs. those who did not (62% vs. 33%, p< 0.001). Fluoxetine treatment was associated with greater reduction in depressive symptoms (p< 0.05). The 54 subjects who achieved binge abstinence improved more on all measures than the 62 subjects who did not. In particular, these subjects lost, on average, 6.2 kg compared with a gain of 0.7 kg among non‐abstainers. Discussion: Adjunctive individual CBT results in significant additional binge reduction in obese binge eaters receiving standard behavioral weight control treatment.
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- 2005
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21. Hypopharyngeal Perforation Near‐Miss During Transesophageal Echocardiography
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Aviv, Jonathan E., Di Tullio, Marco R., Homma, Shunichi, Storper, Ian S., Zschommler, Anne, Ma, Guoguang, Petkova, Eva, Murphy, Mark, Desloge, Rosemary, Shaw, Gary, Benjamin, Stanley, and Corwin, Steven
- Abstract
Objectives/Hypothesis:The traditional blind passage of a transesophageal echocardiography probe transorally through the hypopharynx is considered safe. Yet, severe hypopharyngeal complications during transesophageal echocardiography at several institutions led the authors to investigate whether traditional probe passage results in a greater incidence of hypopharyngeal injuries when compared with probe passage under direct visualization.
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- 2004
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22. A Method to Quantify Rater Bias in Antidepressant Trials
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Petkova, Eva, Quitkin, Frederic M, McGrath, Patrick J, Stewart, Jonathan W, and Klein, Donald F
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Some studies indicate that the blind in clinical trials of the efficacy of antidepressant drugs is less than perfect. It has been suggested that, as a consequence of this incomplete blind, biased raters inflate efficacy and that, in fact, these drugs are relatively ineffective. However, in the literature, we could find no prior attempt to quantify rater bias and, thus, measure its contribution to claims of antidepressant efficacy. We used the distribution of SCL-90 (Symptom Check List) depression scale scores to derive a patient-based effect size, and contrasted this with the clinician-based effect size. We propose the difference between these two effect sizes (patient self-rating and clinician-derived) to be an indirect measure of bias. If patients had a prodrug bias, this method would be invalid. However the response rate from studies with active placebo suggest a patient prodrug bias is unlikely. The effect sizes derived from patient self-ratings are smaller than those derived from clinician ratings. This allows for the possibility that some clinician ratings were biased. However, quantifying the effect of bias suggests that it was insufficient to invalidate the original study conclusions based on clinician ratings, because the proportion of responders, based on patient self-ratings, differed significantly between the two drugs and placebo. Their 95% confidence intervals (CI) did not overlap. This analysis allows that some clinician ratings may be biased. However, the extent of bias appears insufficient to alter conclusions based on clinician ratings regarding efficacy of antidepressant drugs in this trial. Application of our approach in other trials is necessary to establish generalizability.
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- 2000
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23. Substance Use During Sex and Sensation Seeking as Predictors of Sexual Risk Behavior Among HIV+ and HIV− Gay Men
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Dolezal, Curtis, Meyer-Bahlburg, Heino, Remien, Robert, and Petkova, Eva
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Substance use (i.e., use of recreational drugs and alcohol) has been associated with HIV-related sexual risk behavior in several studies involving gay men. One explanatory hypothesis proposes that substance use and sexual risk behavior are both a function of underlying personality traits. This paper examines sensation seeking and alcohol and drug use during sex as predictors of unprotected anal and oral sex and of a sexual risk index. The sample includes 117 predominantly gay-identified men (73 HIV+ and 44 HIV−) who participated in a 5-year natural history study of HIV disease in New York City. Repeated measures regression analyses tested predictor variables individually and in models including all predictor variables simultaneously. Alcohol use, drug use, and sensation seeking were each significantly associated with all sexual risk behavior variables when entered individually. When predictor variables were entered simultaneously in analyses involving unprotected receptive and insertive anal sex, sensation seeking remained a significant predictor, with substance use typically falling to marginal significance. However, significant associations between substance use and the other sexual risk behavior variables (oral sex and a risk index) are maintained even when controlling for sensation seeking. The results suggest that sensation seeking may partially account for the association between substance use and sexual risk behavior, but substantial independent associations also exist.
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- 1997
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24. Chronological Milestones to Guide Drug Change: When Should Clinicians Switch Antidepressants?
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Quitkin, Frederic M., McGrath, Patrick J., Stewart, Jonathan W., Ocepek-Welikson, Katja, Taylor, Bonnie P., Nunes, Edward, Deliyannides, Deborah, Agosti, Vito, Donovan, Steven J., Petkova, Eva, and Klein, Donald F.
- Abstract
BACKGROUND: We attempt to identify the time when patients whose conditions are unimproved while receiving antidepressants are unlikely to respond and should have their treatment changed. METHODS: A total of 593 patients were studied. The course of treatment for patients was examined to determine the weeks at which patients who received drug therapy had a better chance of being rated as responders at the study end (week 6) vs patients who received placebo. RESULTS: At the end of week 3, 19 (32%) of the 59 patients who received drug therapy and 6 (10%) of the 57 patients who received placebo and who never minimally improved were rated as responders at week 6. For those who showed no improvement by week 4, the effects of drug therapy and the placebo were equal. Patients who received drug therapy and whose conditions were unimproved but who had been minimally improved at some point had a superior prognosis with drug therapy vs placebo until week 4. Of those unimproved at week 4 but minimally improved at some point previously, 20 (39%) of the 51 patients who received drug therapy vs 3 (8%) of the 36 patients who received pIacebo were rated as responders at week 6. Of the 75 patients who minimally improved while receiving drug therapy at the end of week 5, 33 (44%) had a chance of being rated a responder at the end of week 6 vs 9 (26%) of the 35 patients receiving placebo. CONCLUSIONS: Patients tolerant of an adequate dose, whose conditions have never been at least minimally improved by the end of week 4, should have their treatment regimen altered. These patients represented a minority of drug-treated patients in the sample studied (ie, 39/392 [10%]). Patients whose conditions minimally improve at some prior week but not after week 5 should have their treatment changed. Patients whose conditions minimally improve in week 5 should continue treatment until week 6.
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- 1996
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25. Statistical Methods for Analyzing Collapsibility in Regression Models
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Clogg, Clifford C., Petkova, Eva, and Shihadeh, Edward S.
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We give a unified treatment of statistical methods for assessing collapsibility in regression problems, including some possible extensions to the class of generalized linear models. Terminology is borrowed from the contingency table area where various methods for assessing collapsibility have been proposed. Our procedures, however, can be motivated by considering extensions, and alternative derivations, of common procedures for omitted-variable bias in linear regression. Exact tests and interval estimates with optimal properties are available for linear regression with normal errors, and asymptotic procedures follow for models with estimated weights. The methods given here can be used to compareβ1and β2in the common setting where the response function is first modeled asXβ1(reduced model) and then asXβ2+Zγ(full model), withZa vector of covariates omitted from the reduced model. These procedures can be used in experimental settings (X= randomly asigned treatments,Z= covariates) or in nonexperimental settings where two models viewed as alternative behavioral or structural explanations are compared (one model withXonly, another model withXandZ).
- Published
- 1992
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26. Statistical Methods for Comparing Regression Coefficients Between Models
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Clogg, Clifford C., Petkova, Eva, and Haritou, Adamantios
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Statistical methods are developed for comparing regression coefficients between models in the setting where one of the models is nested in the other. Comparisons of this kind are of interest whenever two explanations of a given phenomenon are specified as linear models. In this case, researchers should ask whether the coefficients associated with a given set of predictors change in a significant way when other predictors or covariates are added as controls. Simple calculations based on quantities provided by routines for regression analysis can be used to obtain the standard errors and other statistics that are required. Results are also given for the class of generalized linear models (e.g., logistic regression, log-linear models, etc.). We recommend fundamental change in strategies for model comparison in social research as well as modifications in the presentation of results from regression or regression-type models.
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- 1995
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27. Reply to Allison: More on Comparing Regression Coefficients
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Clogg, Clifford C., Petkova, Eva, and Cheng, Tzuwei
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- 1995
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28. P1‐253: ARE PLASMA AMYLOID‐β LEVELS IN LATE‐LIFE MAJOR DEPRESSION A MARKER OF HEIGHTENED AD RISK?
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Pomara, Nunzio, Bruno, Davide, Petkova, Eva, Reichert, Chelsea, Zetterberg, Henrik, Blennow, Kaj, and Nierenberg, Jay
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- 2019
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29. A comparison of hippocampal volume and integrity: Which is the better predictor of cognitive decline?
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Bruno, Davide, Ciarleglio, Adam, Grothe, Michel J., Nierenberg, Jay, Bachman, Alvin, Teipel, Stefan J., Petkova, Eva, Sidtis, John, Adrenkani, Babak, and Pomara, Nunzio
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- 2015
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30. Predictors of cognitive decline in elderly depressives.
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Pomara, Nunzio, Bruno, Davide, Ciarleglio, Adam, Constantine, Adam, Reichert, Chelsea, Zetterberg, Henrik, Blennow, Kaj, Petkova, Eva, and Sidtis, John
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- 2015
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31. Circulating Aβ40 influences plasma BDNF levels and white matter integrity.
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Pomara, Nunzio, Bruno, Davide, Pillai, Anilkumar, Nierenberg, Jay, Ginsberg, Stephen, Petkova, Eva, Sidtis, John J., Mehta, Pankaj, Zetterberg, Henrik, Blennow, Kaj, and Buckley, Peter
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- 2012
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32. Predicting Potential Placebo Effect in Drug Treated Subjects
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Petkova, Eva, Tarpey, Thaddeus, and Govindarajulu, Usha
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Non-specific responses to treatment (commonly known as placebo response) are pervasive when treating mental illness. Subjects treated with an active drug may respond in part due to non-specific aspects of the treatment, i.e, those not related to the chemical effect of the drug. To determine the extent a subject responds due to the chemical effect of a drug, one must disentangle the specific drug effect from the non-specific placebo effect. This paper presents a unique statistical model that allows for the separate prediction of a specific effect and non-specific effects in drug treated subjects. Data from a clinical trial comparing fluoxetine to a placebo for treating depression is used to illustrate this methodology.
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- 2009
33. Predicting Potential Placebo Effect in Drug Treated Subjects
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Petkova, Eva, Tarpey, Thaddeus, and Govindarajulu, Usha
- Abstract
Non-specific responses to treatment (commonly known as placebo response) are pervasive when treating mental illness. Subjects treated with an active drug may respond in part due to non-specific aspects of the treatment, i.e, those not related to the chemical effect of the drug. To determine the extent a subject responds due to the chemical effect of a drug, one must disentangle the specific drug effect from the non-specific placebo effect. This paper presents a unique statistical model that allows for the separate prediction of a specific effect and non-specific effects in drug treated subjects. Data from a clinical trial comparing fluoxetine to a placebo for treating depression is used to illustrate this methodology.
- Published
- 2009
- Full Text
- View/download PDF
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