7 results on '"Kan, Cornelis"'
Search Results
2. High Functioning Autism Spectrum Disorders in Adults: Consequences for Primary Caregivers Compared to Schizophrenia and Depression
- Author
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Grootscholten, Inge A. C., van Wijngaarden, Bob, and Kan, Cornelis C.
- Abstract
Primary caregivers experience consequences from being in close contact to a person with autism spectrum disorder (ASD). This study used the Involvement Evaluation Questionnaire to explore the level of consequences of 104 caregivers involved with adults with High Functioning ASD (HF-ASD) and compared these with the consequences reported by caregivers of patients suffering from depression and schizophrenia. Caregivers involved with adults with an HF-ASD experience overall consequences comparable to those involved with patients with depression or schizophrenia. Worrying was the most reported consequence. More tension was experienced by the caregivers of ASD patients, especially by spouses. More care and attention for spouses of adults with an HF-ASD appears to be needed.
- Published
- 2018
- Full Text
- View/download PDF
3. Translation, Cross-Cultural Adaptation, and Validation of a Dutch Version of the Actions and Feelings Questionnaire in Autistic and Neurotypical Adults.
- Author
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van der Meer, Hedwig A., Sheftel-Simanova, Irina, Kan, Cornelis C., and Trujillo, James P.
- Subjects
RESEARCH methodology evaluation ,CULTURAL pluralism ,QUESTIONNAIRES ,AUTISM ,DESCRIPTIVE statistics ,DATA analysis software ,TRANSLATIONS ,EVALUATION - Abstract
The actions and feelings questionnaire (AFQ) provides a short, self-report measure of how well someone uses and understands visual communicative signals such as gestures. The objective of this study was to translate and cross-culturally adapt the AFQ into Dutch (AFQ-NL) and validate this new version in neurotypical and autistic populations. Translation and adaptation of the AFQ consisted of forward translation, synthesis, back translation, and expert review. In order to validate the AFQ-NL, we assessed convergent and divergent validity. We additionally assessed internal consistency using Cronbach's alpha. Validation and reliability outcomes were all satisfactory. The AFQ-NL is a valid adaptation that can be used for both autistic and neurotypical populations in the Netherlands. [ABSTRACT FROM AUTHOR]
- Published
- 2022
- Full Text
- View/download PDF
4. Relationships Between Functional Outcomes and Symptomatic Improvement in Atomoxetine-Treated Adult Patients with Attention-Deficit/Hyperactivity Disorder: Post Hoc Analysis of an Integrated Database.
- Author
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Bruyckere, Katrien, Bushe, Chris, Bartel, Christoph, Berggren, Lovisa, Kan, Cornelis, Dittmann, Ralf, De Bruyckere, Katrien, Kan, Cornelis C, and Dittmann, Ralf W
- Subjects
ATTENTION-deficit disorder in adults ,ATOMOXETINE ,TREATMENT effectiveness ,CLINICAL trials ,SYMPTOMS ,THERAPEUTICS ,AMINES ,ADRENERGIC uptake inhibitors ,ATTENTION-deficit hyperactivity disorder ,COMPARATIVE studies ,DATABASES ,HEALTH surveys ,RESEARCH methodology ,MEDICAL cooperation ,PSYCHOLOGICAL tests ,QUALITY of life ,QUESTIONNAIRES ,RESEARCH ,SELF-evaluation ,EVALUATION research ,SEVERITY of illness index - Abstract
Background: Atomoxetine treatment is associated with improvements in functional outcomes in patients with attention-deficit/hyperactivity disorder (ADHD), although relationships between improvements in these outcomes and reductions in ADHD symptoms have not been comprehensively investigated in adults.Objectives: The aim of this study was to assess relationships between functional outcomes and ADHD symptoms (primary objective), and to assess time courses of changes in functional outcomes from baseline to weeks 10 and 24 (secondary objective).Methods: We analyzed data pooled from seven Eli Lilly-sponsored placebo-controlled trials of atomoxetine in adults with ADHD that had Conners' Adult ADHD Rating Scales-Investigator Rated: Screening Version (CAARS-Inv:SV) total scores and functional outcome data at baseline and at week 10. Two trials also had these data at week 24. Patients were included in these pooled analyses if they had a CAARS-Inv:SV total score at baseline and at one or more post-baseline visits at weeks 10 or 24, or had post-baseline scores that would allow missing scores at weeks 10 or 24 to be imputed. To address the primary objective, changes in functional outcomes during treatment with atomoxetine versus placebo were assessed using last observation carried forward (LOCF) analysis of covariance (ANCOVA) and mixed-effects model repeated measures (MMRM) analysis, and correlations between score changes in CAARS-Inv:SV total and functional outcomes were assessed using Spearman's rank correlation coefficient (r) at weeks 10 and 24. The secondary objective was addressed using MMRM.Results: At baseline, patients generally had moderately severe or worse ADHD symptoms (based on CAARS-Inv:SV total scores) and impaired functional outcomes (based on Adult ADHD Quality-of-Life [AAQoL], Behavior Rating Inventory of Executive Function-Adult Version [BRIEF-A], Sheehan Disability Scale [SDS], and 36-item Short-Form Health Survey [SF-36] scores). These baseline characteristics were comparable in the atomoxetine and placebo groups. For atomoxetine versus placebo, statistically significant improvements were detected in AAQoL total and subscores at weeks 10 and 24, and in BRIEF-A Self-Report scores at week 10, but not in BRIEF-A Informant Report or SDS scores at week 10 (no BRIEF-A or SDS data were available at week 24), and not in SF-36 at weeks 10 or 24. All functional improvements were gradual. During treatment with atomoxetine, there were moderate correlations between reductions in CAARS-Inv:SV total scores and increases in AAQoL total and subscores at weeks 10 and 24 (r range -0.58 to -0.39; n = 394-545), and also with reductions in BRIEF-A Self-Report at week 10 (r = 0.49; n = 256). With placebo, moderate correlations were also found between reductions in CAARS-Inv:SV total scores and increases in AAQoL total and subscores at weeks 10 and 24 (r range -0.56 to -0.28; n = 321-542), and with reductions in BRIEF-A Self-Report at week 10 (r = 0.49; n = 271). However, correlations between changes in CAARS-Inv:SV and BRIEF-A Informant at week 10 were low for atomoxetine-treated patients (r = 0.25; n = 65), moderate with placebo (r = 0.42; n = 72), and there were low/no correlations between changes in CAARS-Inv:SV and functional outcome rating scales that are not specific to ADHD; that is, for atomoxetine-treated patients, SDS total r = 0.19 (n = 32 at week 10) and SF-36 r range - 0.20 to -0.01 (n = 51 at week 10, n = 183 at week 24).Conclusions: Atomoxetine-treated adult patients experienced improvements in functional outcomes (AAQoL and BRIEF-A Self-Report) that correlated with reductions in ADHD symptoms. Although atomoxetine improved both the ADHD symptoms and functional outcomes, the correlation between symptoms and functional outcomes was low to moderate, suggesting that they measure overlapping but different aspects of the disorder. Hence, clinicians should assess not just ADHD symptoms, but also the functional impairments. [ABSTRACT FROM AUTHOR]- Published
- 2016
- Full Text
- View/download PDF
5. High Functioning Autism Spectrum Disorders in Adults: Consequences for Primary Caregivers Compared to Schizophrenia and Depression.
- Author
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Grootscholten, Inge A. C., van Wijngaarden, Bob, and Kan, Cornelis C.
- Subjects
AUTISM ,PSYCHOLOGY of caregivers ,MENTAL depression ,EXPERIENCE ,PARENTS ,QUESTIONNAIRES ,SCHIZOPHRENIA ,SPOUSES ,PSYCHOLOGICAL stress ,SYMPTOMS - Abstract
Primary caregivers experience consequences from being in close contact to a person with autism spectrum disorder (ASD). This study used the Involvement Evaluation Questionnaire to explore the level of consequences of 104 caregivers involved with adults with High Functioning ASD (HF-ASD) and compared these with the consequences reported by caregivers of patients suffering from depression and schizophrenia. Caregivers involved with adults with an HF-ASD experience overall consequences comparable to those involved with patients with depression or schizophrenia. Worrying was the most reported consequence. More tension was experienced by the caregivers of ASD patients, especially by spouses. More care and attention for spouses of adults with an HF-ASD appears to be needed. [ABSTRACT FROM AUTHOR]
- Published
- 2018
- Full Text
- View/download PDF
6. Lower white matter microstructure in the superior longitudinal fasciculus is associated with increased response time variability in adults with attention-deficit/hyperactivity disorder.
- Author
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Wolfers, Thomas, Onnink, A. Marten H., Zwiers, Marcel P., Arias-Vasquez, Alejandro, Hoogman, Martine, Mostert, Jeanette C., Kan, Cornelis C., Slaats-Willemse, Dorine, Buitelaar, Jan K., and Franke, Barbara
- Subjects
BRAIN physiology ,ANALYSIS of covariance ,ATTENTION-deficit hyperactivity disorder ,INTERVIEWING ,LONGITUDINAL method ,MEDICAL cooperation ,QUESTIONNAIRES ,REACTION time ,REGRESSION analysis ,RESEARCH ,RESEARCH funding ,STATISTICS ,LOGISTIC regression analysis ,DATA analysis ,DESCRIPTIVE statistics - Abstract
Background: Response time variability (RTV) is consistently increased in patients with attention-deficit/hyperactivity disorder (ADHD). A right-hemispheric frontoparietal attention network model has been implicated in these patients. The 3 main connecting fibre tracts in this network, the superior longitudinal fasciculus (SLF), inferior longitudinal fasciculus (ILF) and the cingulum bundle (CB), show microstructural abnormalities in patients with ADHD. We hypothesized that the microstructural integrity of the 3 white matter tracts of this network are associated with ADHD and RTV. Methods: We examined RTV in adults with ADHD by modelling the reaction time distribution as an exponentially modified Gaussian (ex-Gaussian) function with the parameters μ, σ and, the latter of which has been attributed to lapses of attention. We assessed adults with ADHD and healthy controls using a sustained attention task. Diffusion tensor imaging--derived fractional anisotropy (FA) values were determined to quantify bilateral microstructural integrity of the tracts of interest. Results: We included 100 adults with ADHD and 96 controls in our study. Increased τ was associated with ADHD diagnosis and was linked to symptoms of inattention. An inverse correlation of τ with mean FA was seen in the right SLF of patients with ADHD, but no direct association between the mean FA of the 6 regions of interest with ADHD could be observed. Limitations: Regions of interest were defined a priori based on the attentional network model for ADHD and thus we might have missed effects in other networks. Conclusion: This study suggests that reduced microstructural integrity of the right SLF is associated with elevated τ in patients with ADHD. [ABSTRACT FROM AUTHOR]
- Published
- 2015
- Full Text
- View/download PDF
7. Processing of Emotion Words by Patients with Autism Spectrum Disorders: Evidence from Reaction Times and EEG.
- Author
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Lartseva, Alina, Dijkstra, Ton, Kan, Cornelis, and Buitelaar, Jan
- Subjects
ELECTROENCEPHALOGRAPHY ,ANALYSIS of variance ,AUTISM ,CLUSTER analysis (Statistics) ,COMMUNICATIVE competence ,ELECTRODES ,EMOTIONS ,INTERVIEWING ,QUESTIONNAIRES ,REACTION time ,RESEARCH funding ,SCALE analysis (Psychology) ,PHYSIOLOGICAL aspects of speech ,T-test (Statistics) ,THOUGHT & thinking ,SOFTWARE architecture ,REPEATED measures design ,SYMPTOMS - Abstract
This study investigated processing of emotion words in autism spectrum disorders (ASD) using reaction times and event-related potentials (ERP). Adults with (n = 21) and without (n = 20) ASD performed a lexical decision task on emotion and neutral words while their brain activity was recorded. Both groups showed faster responses to emotion words compared to neutral, suggesting intact early processing of emotion in ASD. In the ERPs, the control group showed a typical late positive component (LPC) at 400-600 ms for emotion words compared to neutral, while the ASD group showed no LPC. The between-group difference in LPC amplitude was significant, suggesting that emotion words were processed differently by individuals with ASD, although their behavioral performance was similar to that of typical individuals. [ABSTRACT FROM AUTHOR]
- Published
- 2014
- Full Text
- View/download PDF
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