23 results on '"Jennifer L. Rehm"'
Search Results
2. At the Margins: Comparing School Experiences of Nonbinary and Binary‐Identified Transgender Youth
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Ben Andert, Stephanie L. Budge, Brittany J. Allen, Jay Botsford, and Jennifer L. Rehm
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Male ,Multivariate analysis ,Adolescent ,education ,Logistic regression ,Transgender Persons ,Peer Group ,Article ,Education ,Developmental psychology ,Young Adult ,03 medical and health sciences ,Wisconsin ,0302 clinical medicine ,Surveys and Questionnaires ,030225 pediatrics ,Transgender ,Humans ,030212 general & internal medicine ,Child ,Sexual identity ,Schools ,Public Health, Environmental and Occupational Health ,Gender Identity ,Social Support ,Mental health ,Sexual minority ,Gender binary ,Philosophy ,Female ,Psychology ,Inclusion (education) - Abstract
BACKGROUND: Transgender, nonbinary, and gender nonconforming (TNG) young people are a diverse group, including young people with gender identities beyond the gender binary. While nonbinary youth experience disparities in victimization and mental health, school belonging, support, and resources have not been well described. METHODS: We conducted an online survey of TNG young people (ages 12–22) in Wisconsin to assess school belonging, safety, support, and resources. We compared responses among participants with nonbinary versus binary identities using mulvariate analysis of variance, multivariate analysis of covariance, chi-square and logistic regression analysis. RESULTS: A total of 287 TNG young people met inclusion criteria (average age 18.2 ± 2.5 years). More than 40 percent of participants identified as nonbinary. Nonbinary participants were less likely to be out to teachers, but more likely to utilize supportive staff as a resource compared to binary-identified TNG peers. There were no significant differences in school safety and belonging. CONCLUSIONS: Most school experiences do not vary significantly between TNG young people with binary versus nonbinary gender identities, though nonbinary young people are less likely to be out at school. Future research should examine factors that impact whether nonbinary young people share their gender identity and access school support services.
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- 2020
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3. Providing Gender-Affirmative Care During the Severe Acute Respiratory Syndrome Coronavirus 2 Pandemic Era: Experiences and Perspectives from Pediatric Endocrinologists in the United States
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Toni Eimicke, Kara J. Connelly, Janet Y. Lee, Jennifer L. Rehm, and Stephanie A. Roberts
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medicine.medical_specialty ,2019-20 coronavirus outbreak ,Coronavirus disease 2019 (COVID-19) ,pediatrics ,viruses ,Severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) ,Medicine (miscellaneous) ,Gender Studies ,Short Reports ,Clinical Research ,Pandemic ,Transgender ,medicine ,endocrinologists ,Intensive care medicine ,Lung ,Pediatric ,business.industry ,pandemic ,virus diseases ,Pneumonia ,respiratory system ,Health Services ,gender-affirmative care ,transgender ,Health equity ,Health care delivery ,body regions ,Good Health and Well Being ,Pneumonia & Influenza ,business ,human activities - Abstract
Transgender and gender diverse (TGD) youth are at risk of worsened health disparities during the severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) pandemic. Health care delivery by pediatric endocrinologists, including rapid implementation of telemedicine services, during the pandemic has not been documented. The Pediatric Endocrine Society's Transgender Health Special Interest Group met virtually to survey practice patterns during the SARS-CoV-2 pandemic. The majority of pediatric endocrinologists continued to provide most aspects of medical transition; however, we also identified several barriers to care. Overall, the survey results demonstrated that telemedicine can be utilized as an effective way to provide gender-affirming medical care to TGD youth.
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- 2022
4. Improved free-breathing liver fat and iron quantification using a 2D chemical shift-encoded MRI with flip angle modulation and motion-corrected averaging
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Jitka Starekova, Ruiyang Zhao, Timothy J. Colgan, Kevin M. Johnson, Jennifer L. Rehm, Shane A. Wells, Scott B. Reeder, and Diego Hernando
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Adult ,Liver ,Iron ,Image Interpretation, Computer-Assisted ,Humans ,Reproducibility of Results ,Radiology, Nuclear Medicine and imaging ,General Medicine ,Prospective Studies ,Protons ,Child ,Magnetic Resonance Imaging ,Article - Abstract
3D chemical shift-encoded (CSE) MRI enables accurate and precise quantification of proton density fat fraction (PDFF) and R2*, biomarkers of hepatic fat and iron deposition. Unfortunately, 3D CSE-MRI requires reliable breath-holding. Free-breathing 2D CSE-MRI with sequential radiofrequency excitation is a motion-robust alternative but suffers from low signal-to-noise-ratio (SNR). To overcome this limitation, this work explores the combination of flip angle-modulated (FAM) 2D CSE imaging with a non-local means (NLM) motion-corrected averaging technique.In this prospective study, 35 healthy subjects (27 children/8 adults) were imaged on a 3T MRI-system. Multi-echo 3D CSE ("3D") and 2D CSE FAM ("FAM") images were acquired during breath-hold and free-breathing, respectively, to obtain PDFF and R2* maps of the liver. Multi-repetition FAM was postprocessed with direct averaging (DA)- and NLM-based averaging and compared to 3D CSE using Bland-Altmann and regression analysis. Image qualities of PDFF and R2* maps were reviewed by two radiologists using a Likert-like scale (score 1-5, 5 = best).Compared to 3D CSE, multi-repetition FAM-NLM showed excellent agreement (regression slope = 1.0, RFree-breathing FAM-NLM provides superior image quality of the liver compared to the conventional breath-hold 3D CSE-MRI, while minimizing bias for PDFF and R2* quantification.• 2D CSE FAM-NLM is a free-breathing method for liver fat and iron quantification and viable alternative for patients unable to hold their breath. • 2D CSE FAM-NLM is a feasible alternative to breath-hold 3D CSE methods, with low bias in proton density fat fraction (PDFF) and no clinically significant bias in R2*. • Quantitatively, multiple repetitions in 2D CSE FAM-NLM lead to improved SNR.
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- 2021
5. Potential association between type 1 diabetes mellitus and gender dysphoria
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Santhi N Logel, M. Tracy Bekx, and Jennifer L. Rehm
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Male ,Gender dysphoria ,Pediatrics ,medicine.medical_specialty ,Adolescent ,endocrine system diseases ,Endocrinology, Diabetes and Metabolism ,Population ,Prevalence ,030209 endocrinology & metabolism ,Comorbidity ,Article ,Cohort Studies ,Young Adult ,03 medical and health sciences ,Wisconsin ,0302 clinical medicine ,Psychiatric history ,immune system diseases ,Diabetes mellitus ,Internal Medicine ,medicine ,Humans ,030212 general & internal medicine ,Child ,Gender Dysphoria ,education ,Glycemic ,education.field_of_study ,Type 1 diabetes ,business.industry ,nutritional and metabolic diseases ,medicine.disease ,Diabetes Mellitus, Type 1 ,Pediatrics, Perinatology and Child Health ,Female ,Electronic data ,business ,human activities - Abstract
Background/objective Multiple factors have been proposed to explain the increasing prevalence of type 1 diabetes mellitus (T1DM), including psychological stress. The prevalence of gender dysphoria (GD) in youth is also growing. Identifying environmental triggers, such as psychological minority stress experienced by youth with GD, that may influence the pathogenesis and management of T1DM could have important clinical implications. The objective of this study was to determine the prevalence of concurrent diagnosis of T1DM and GD in adolescents evaluated at a university-based children's hospital. Methods An electronic data extraction was conducted at the University of Wisconsin Hospital and Clinics from 1 November 2007 to 1 November 2017. Inclusion criteria included age 10 to 21 years and diagnosis of T1DM and/or GD. Prevalence rates were calculated for T1DM and GD. For adolescents with T1DM and GD, information related to diagnosis, treatment, and psychiatric history was collected. Results The prevalence for T1DM was 2.69 per 1000; the prevalence for GD was 0.42 per 1000. Eight adolescents had T1DM and GD. In adolescents with GD, the prevalence of T1DM was 9.4-fold higher than the prevalence of T1DM alone (24.77 vs 2.68 per 1000). Five adolescents were seen in GD clinic and their glycemic control initially improved after the first GD clinic visit. Conclusions There was an increased prevalence of a concurrent diagnosis of T1DM in those with GD compared to the general population. Glycemic control improved after the first GD clinic visit in adolescents with T1DM and GD, which may be secondary to stress reduction.
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- 2019
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6. Motion-Robust, High-SNR Liver Fat Quantification using a 2D Sequential Acquisition with a Variable Flip Angle Approach
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Ruiyang Zhao, Yuxin Zhang, Jennifer L. Rehm, Xiaoke Wang, Diego Hernando, Kevin M. Johnson, Scott B. Reeder, and Timothy J. Colgan
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Adult ,Phase (waves) ,Imaging phantom ,Standard deviation ,Article ,030218 nuclear medicine & medical imaging ,law.invention ,03 medical and health sciences ,Motion ,0302 clinical medicine ,Flip angle ,Robustness (computer science) ,law ,Encoding (memory) ,Humans ,Radiology, Nuclear Medicine and imaging ,Cartesian coordinate system ,Child ,Mathematics ,Computer simulation ,Reproducibility of Results ,Magnetic Resonance Imaging ,Liver ,Artifacts ,Algorithm ,030217 neurology & neurosurgery - Abstract
Purpose Chemical shift encoded (CSE)-MRI enables quantification of proton-density fat fraction (PDFF) as a biomarker of liver fat content. However, conventional 3D Cartesian CSE-MRI methods require breath-holding. A motion-robust 2D Cartesian sequential method addresses this limitation but suffers from low SNR. In this work, a novel free breathing 2D Cartesian sequential CSE-MRI method using a variable flip angle approach with centric phase encoding (VFA-centric) is developed to achieve fat quantification with low T 1 bias, high SNR, and minimal blurring. Methods Numerical simulation was performed for variable flip angle schedule design and preliminary evaluation of VFA-centric method, along with several alternative flip angle designs. Phantom, adults (n = 8), and children (n = 27) were imaged at 3T. Multi-echo images were acquired and PDFF maps were estimated. PDFF standard deviation was used as a surrogate for SNR. Results In both simulation and phantom experiments, the VFA-centric method enabled higher SNR imaging with minimal T 1 bias and blurring artifacts. High correlation (slope = 1.00, intercept = 0.04, R 2 = 0.998) was observed in vivo between the proposed VFA-centric method obtained PDFF and reference PDFF (free breathing low-flip angle 2D sequential acquisition). Further, the proposed VFA-centric method (PDFF standard deviation = 1.5%) had a better SNR performance than the reference acquisition (PDFF standard deviation = 3.3%) with P Conclusions The proposed free breathing 2D Cartesian sequential CSE-MRI method with variable flip angle approach and centric-ordered phase encoding achieved motion robustness, low T 1 bias, high SNR compared to previous 2D sequential methods, and low blurring in liver fat quantification.
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- 2020
7. Thyroid Storm With Concurrent Covid-19 Infection in a Pediatric Patient
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Shardha Srinivasan, Jennifer L. Rehm, Elizabath Mann, Victoria Brocksmith Nicksic, and Santhi N Logel
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Thyroid ,Pediatric patient ,Pediatrics ,medicine.medical_specialty ,Text mining ,Thyroid Disorders Case Report ,Coronavirus disease 2019 (COVID-19) ,business.industry ,Endocrinology, Diabetes and Metabolism ,Thyroid storm ,Medicine ,business ,AcademicSubjects/MED00250 - Abstract
Title: Thyroid Storm with Concurrent COVID-19 Infection in a Pediatric Patient Background: A 16-year-old boy with recently diagnosed hyperthyroidism developed acute worsening of palpitations, tremor, diaphoresis, and shortness of breath in the setting of COVID-19 infection. There is increasing evidence of a relationship between COVID-19 and thyroid disease possibly due SARS-COV-2 use of ACE2 and the transmembrane protease serine 2 (TMPRSS2), which are highly expressed in the thyroid gland, to infect host cells.1 Clinical Case: Patient was diagnosed with hyperthyroidism after presenting to PCP with tremor, palpitations, and weight loss with a TSH On day 5, he developed acute worsening of tremor, palpitations, and weakness and presented to the ED where he was febrile to 38.4 C, tachycardic to 161 BPM, and hypertensive to 139/91 mmHg. Initial laboratory evaluation was significant for TSH 20.0 pg/mL and TRAB was 20.68 IU/L consistent with Graves’ disease. He met diagnostic criteria for thyroid storm with a score of 45 points using the Burch and Wartofsky scoring system based on the presence of thermoregulatory dysfunction (10 points), cardiovascular dysfunction (25 points) and precipitant history (10 points). Patient was admitted to a pediatric ICU and started on methimazole 20 mg every 8 hours, potassium iodide 250 mg every 8 hours, propranolol 40 mg every 8 hours, and hydrocortisone 50 mg every 8 hours with resolution of fever, tachycardia, and hypertension. He was noted to have left ventricular hypertrophy with progressive, asymptomatic ST elevation/nonspecific repolarization changes on electrocardiogram (ECG). Echocardiogram was normal. B-natriuretic peptide and serial troponin were normal. On day 6, inflammatory markers and coagulation studies were reassuring against concurrent multisystem inflammatory syndrome in children. Potassium iodide was discontinued on day 6 and hydrocortisone was discontinued on day 8. Repolarization abnormalities persisted throughout his admission with appearance of prominent U waves and borderline QT prolongation, however no significant arrhythmias were noted. On day 9 FT4 was 1.99 ng/dL and FT3 was 4.8 pg/mL; he was discharged home in stable condition Conclusion: This is the first reported case of COVID-19 infection as presumed precipitant of thyroid storm in a pediatric patient with cardiac findings. [1] Scappaticcio, L., Pitoia, F., Esposito, K., Piccardo, A., & Trimboli, P. (2020). Impact of COVID-19 on the thyroid gland: an update. Reviews in endocrine & metabolic disorders, 1–13. Advance online publication. https://doi.org/10.1007/s11154-020-09615-z
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- 2021
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8. 47. Estrogen to Testosterone Ratio May Predict NAFLD Risk in Pubertal Females
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Yashoda G. Naik, Jennifer L. Rehm, David B. Allen, and Scott B. Reeder
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medicine.medical_specialty ,Endocrinology ,Estrogen ,medicine.drug_class ,business.industry ,Internal medicine ,Pediatrics, Perinatology and Child Health ,medicine ,Obstetrics and Gynecology ,Testosterone (patch) ,General Medicine ,business - Published
- 2019
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9. Quantification of liver fat with respiratory-gated quantitative chemical shift encoded MRI
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Valentina Taviani, Yuji Iwadate, Diego Hernando, James H. Holmes, Kang Wang, Peter Bannas, Jennifer L. Rehm, Scott B. Reeder, Utaroh Motosugi, and Ann Shimakawa
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In vivo magnetic resonance spectroscopy ,medicine.diagnostic_test ,business.industry ,Significant difference ,Percentage point ,Magnetic resonance imaging ,Confidence interval ,parasitic diseases ,Liver fat ,Linear regression ,medicine ,Radiology, Nuclear Medicine and imaging ,Respiratory system ,Nuclear medicine ,business - Abstract
Purpose To evaluate free-breathing chemical shift-encoded (CSE) magnetic resonance imaging (MRI) for quantification of hepatic proton density fat-fraction (PDFF). A secondary purpose was to evaluate hepatic R2* values measured using free-breathing quantitative CSE-MRI. Materials and Methods Fifty patients (mean age, 56 years) were prospectively recruited and underwent the following four acquisitions to measure PDFF and R2*; 1) conventional breath-hold CSE-MRI (BH-CSE); 2) respiratory-gated CSE-MRI using respiratory bellows (BL-CSE); 3) respiratory-gated CSE-MRI using navigator echoes (NV-CSE); and 4) single voxel MR spectroscopy (MRS) as the reference standard for PDFF. Image quality was evaluated by two radiologists. MRI-PDFF measured from the three CSE-MRI methods were compared with MRS-PDFF using linear regression. The PDFF and R2* values were compared using two one-sided t-test to evaluate statistical equivalence. Results There was no significant difference in the image quality scores among the three CSE-MRI methods for either PDFF (P = 1.000) or R2* maps (P = 0.359–1.000). Correlation coefficients (95% confidence interval [CI]) for the PDFF comparisons were 0.98 (0.96–0.99) for BH-, 0.99 (0.97–0.99) for BL-, and 0.99 (0.98–0.99) for NV-CSE. The statistical equivalence test revealed that the mean difference in PDFF and R2* between any two of the three CSE-MRI methods was less than ±1 percentage point (pp) and ±5 s−1, respectively (P
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- 2015
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10. Curative potential of allogeneic hematopoietic stem cell transplant in type 1 diabetes
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Kristen E. McCabe, Jennifer L. Rehm, Kenneth B. DeSantes, and Allison J. Pollock
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0301 basic medicine ,Type 1 diabetes ,endocrine system diseases ,business.industry ,Endocrinology, Diabetes and Metabolism ,nutritional and metabolic diseases ,030209 endocrinology & metabolism ,medicine.disease ,Article ,03 medical and health sciences ,Exogenous insulin ,Pediatric patient ,030104 developmental biology ,0302 clinical medicine ,immune system diseases ,Pediatrics, Perinatology and Child Health ,Immunology ,Internal Medicine ,medicine ,Allogeneic hematopoietic stem cell transplant ,Aplastic anemia ,business - Abstract
The mainstay of treatment for type 1 diabetes (T1D) is exogenous insulin. Here, we report a case in which exogenous insulin requirements were eliminated after an allogeneic hematopoietic stem cell transplant for aplastic anemia in a pediatric patient recently diagnosed with T1D, and explore the validity of this approach compared with current treatments.
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- 2016
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11. BMI Predicts Androgen Levels Better Than Waist Circumference in Obese Adolescent Girls
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Jennifer L. Rehm, M. Tracy Bekx, Ellen L. Connor, Lauren A. Kanner, Jens C. Eickhoff, and David B. Allen
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medicine.medical_specialty ,Endocrinology ,Waist ,medicine.drug_class ,business.industry ,Internal medicine ,Pediatrics, Perinatology and Child Health ,medicine ,Obstetrics and Gynecology ,General Medicine ,Circumference ,Androgen ,business - Published
- 2018
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12. Complexity in the Diagnosis and Management of 45,X Turner Syndrome Mosaicism
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Patrick H. McKenna, Andrew C. Radtke, Jennifer L. Rehm, and Christina Sauder
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medicine.medical_specialty ,Mosaicism ,business.industry ,Urology ,Infant, Newborn ,Turner Syndrome ,Multidisciplinary team ,medicine.disease ,Infant newborn ,Karyotyping ,Family medicine ,Turner syndrome ,Humans ,Medicine ,business ,Psychiatry - Abstract
Diagnosis, decision making, and counseling for patients with disorders of sexual development pose challenges for physicians and families. Accurate antenatal evaluation combined with effective communication between the family and multidisciplinary team is important to provide the best patient outcome. We reviewed 2 cases from our institution that illustrate the complexity of antenatal and postnatal management in Turner Syndrome patients who have 45,X mosaicism. We concluded that because of the complexity involved in providing appropriate care to these individuals, it is critical that accurate and universally accessible counseling materials are available to providers and families at the time of diagnosis and management decision making.
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- 2014
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13. BMI Better Predictor of Insulin Resistance Compared to Waist Circumference in Obese Adolescent Girls
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M. Tracy Bekx, Jens C. Eickhoff, David B. Allen, Jennifer L. Rehm, Lauren A. Kanner, and Ellen L. Connor
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medicine.medical_specialty ,Waist ,Insulin resistance ,business.industry ,Internal medicine ,Pediatrics, Perinatology and Child Health ,Obstetrics and Gynecology ,Medicine ,General Medicine ,business ,Circumference ,medicine.disease - Published
- 2018
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14. In Nonobese Girls, Waist Circumference as a Predictor of Insulin Resistance Is Comparable to MRI Fat Measures and Superior to BMI
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Ellen L. Connor, Jennifer L. Rehm, Jens C. Eickhoff, David B. Allen, Scott B. Reeder, Peter M. Wolfgram, and Wei Zha
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Blood Glucose ,Leptin ,medicine.medical_specialty ,Waist ,Adolescent ,Endocrinology, Diabetes and Metabolism ,Adipose tissue ,Article ,Body Mass Index ,Endocrinology ,Insulin resistance ,Internal medicine ,Sex Hormone-Binding Globulin ,medicine ,Humans ,Insulin ,Child ,Triglycerides ,2. Zero hunger ,Adiponectin ,medicine.diagnostic_test ,business.industry ,Magnetic resonance imaging ,medicine.disease ,Circumference ,Magnetic Resonance Imaging ,Adipose Tissue ,Pediatrics, Perinatology and Child Health ,Female ,Insulin Resistance ,Waist Circumference ,business ,Body mass index - Abstract
Objective: The aim of this study was to investigate the degree to which waist circumference (WC), body mass index (BMI), and magnetic resonance imaging (MRI)-measured abdominal fat deposition predict insulin resistance (IR) in nonobese girls of diverse racial and ethnic backgrounds. Methods: Fifty-seven nonobese girls (12 African-American, 16 Hispanic White, and 29 non-Hispanic White girls) aged 11-14 years were assessed for WC, MRI hepatic proton density fat fraction, visceral and subcutaneous adipose tissue volume, BMI Z-score, fasting insulin, homeostasis model of assessment (HOMA)-IR, adiponectin, leptin, sex hormone-binding globulin, high-density lipoprotein cholesterol, and triglycerides. Results: Univariate and multivariate analyses adjusted for race and ethnicity indicated that only WC and visceral adipose tissue volume were independent predictors of fasting insulin and HOMA-IR, while hepatic proton density fat fraction, BMI Z-score, and subcutaneous adipose tissue volume were dependent predictors. Hispanic White girls showed significantly higher mean fasting insulin and HOMA-IR and lower sex hormone-binding globulin than non-Hispanic White girls (p < 0.01). Conclusions: In nonobese girls of diverse racial and ethnic backgrounds, WC, particularly when adjusted for race or ethnicity, is an independent predictor of IR comparable to MRI-derived measurements of fat and superior to the BMI Z-score.
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- 2015
15. Anthropometric Markers Are Poor Predictors of Androgen Levels in Obese Adolescent Girls With PCOS
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Lauren A. Kanner, M. Tracy Bekx, David B. Allen, Ellen L. Connor, Jens C. Eickhoff, and Jennifer L. Rehm
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medicine.medical_specialty ,medicine.drug_class ,business.industry ,Internal medicine ,Pediatrics, Perinatology and Child Health ,medicine ,Obstetrics and Gynecology ,General Medicine ,Anthropometry ,Androgen ,business - Published
- 2017
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16. Quantification of liver fat with respiratory-gated quantitative chemical shift encoded MRI
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Utaroh, Motosugi, Diego, Hernando, Peter, Bannas, James H, Holmes, Kang, Wang, Ann, Shimakawa, Yuji, Iwadate, Valentina, Taviani, Jennifer L, Rehm, and Scott B, Reeder
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Fatty Liver ,Male ,Liver ,Humans ,Reproducibility of Results ,Female ,Prospective Studies ,Middle Aged ,Protons ,Magnetic Resonance Imaging ,Article - Abstract
To evaluate free-breathing chemical shift-encoded (CSE) magnetic resonance imaging (MRI) for quantification of hepatic proton density fat-fraction (PDFF). A secondary purpose was to evaluate hepatic R2* values measured using free-breathing quantitative CSE-MRI.Fifty patients (mean age, 56 years) were prospectively recruited and underwent the following four acquisitions to measure PDFF and R2*; 1) conventional breath-hold CSE-MRI (BH-CSE); 2) respiratory-gated CSE-MRI using respiratory bellows (BL-CSE); 3) respiratory-gated CSE-MRI using navigator echoes (NV-CSE); and 4) single voxel MR spectroscopy (MRS) as the reference standard for PDFF. Image quality was evaluated by two radiologists. MRI-PDFF measured from the three CSE-MRI methods were compared with MRS-PDFF using linear regression. The PDFF and R2* values were compared using two one-sided t-test to evaluate statistical equivalence.There was no significant difference in the image quality scores among the three CSE-MRI methods for either PDFF (P = 1.000) or R2* maps (P = 0.359-1.000). Correlation coefficients (95% confidence interval [CI]) for the PDFF comparisons were 0.98 (0.96-0.99) for BH-, 0.99 (0.97-0.99) for BL-, and 0.99 (0.98-0.99) for NV-CSE. The statistical equivalence test revealed that the mean difference in PDFF and R2* between any two of the three CSE-MRI methods was less than ±1 percentage point (pp) and ±5 s(-1) , respectively (P 0.046).Respiratory-gated CSE-MRI with respiratory bellows or navigator echo are feasible methods to quantify liver PDFF and R2* and are as valid as the standard breath-hold technique.
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- 2014
17. Proton density fat-fraction is an accurate biomarker of hepatic steatosis in adolescent girls and young women
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Jennifer L. Rehm, Scott B. Reeder, Peter M. Wolfgram, Diego Hernando, David B. Allen, and Jens C. Eickhoff
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In vivo magnetic resonance spectroscopy ,medicine.medical_specialty ,Magnetic Resonance Spectroscopy ,Adolescent ,Sensitivity and Specificity ,Article ,Body Mass Index ,Young Adult ,Medicine ,Humans ,Radiology, Nuclear Medicine and imaging ,Prospective Studies ,Prospective cohort study ,Child ,Triglycerides ,Neuroradiology ,medicine.diagnostic_test ,business.industry ,Fatty liver ,Magnetic resonance imaging ,Alanine Transaminase ,General Medicine ,Overweight ,medicine.disease ,Magnetic Resonance Imaging ,Healthy Volunteers ,Fatty Liver ,Cross-Sectional Studies ,Linear Models ,Biomarker (medicine) ,Female ,Radiology ,Steatosis ,Protons ,Waist Circumference ,business ,Body mass index ,Biomarkers - Abstract
To compare complex quantitative magnetic resonance imaging (MRI) with MR spectroscopy (MRS) for quantification of hepatic steatosis (HS) and determine clinically significant MRI-based thresholds of HS in female youths.This prospective, cross-sectional study was conducted in 132 healthy females (11-22 years, mean 13.3 ± 2). Proton density fat-fraction (PDFF) was measured using complex quantitative MRI and MRS. Body mass index (BMI), fasting labs [glucose, insulin, alanine aminotransferase (ALT), and other metabolic markers] were obtained. Outcomes were measured using regression analysis, Spearman-rank correlation, and receiver operator characteristics (ROC) analysis. HS was defined as MRI-PDFF5.6%.HS was detected by MRI-PDFF in 15% of all subjects. Linear regression demonstrated excellent correlation and agreement [r(2) = 0.96, slope = 0.97 (95 %CI: 0.94-1.00), intercept = 0.78% (95 %CI: 0.58-0.98%)] between MRI-PDFF and MRS-PDFF. MRI-PDFF had a sensitivity of 100% (95 %CI: 0.79-1.00), specificity of 96.6% (95 %CI: 0.91-0.99), and a kappa index of 87% (95 %CI: 0.75-0.99) for identifying HS. In overweight subjects with HS, MRI-PDFF correlated with ALT (r = 0.84, p 0.0001) and insulin (r = 0.833, p 0.001), but not with BMI or WC. ROC analysis ascertained an optimal MRI-PDFF threshold of 3.5% for predicting metabolic syndrome (sensitivity = 76 %, specificity = 83 %).Complex quantitative MRI demonstrates strong correlation and agreement with MRS to quantify hepatic triglyceride content in adolescent girls and young women. A low PDFF threshold is predictive of metabolic syndrome in this population.• Confounder-corrected quantitative MRI (ccqMRI) effectively measures hepatic triglyceride content in adolescent girls. • MRS and ccqMRI strongly correlate in liver proton density fat-fraction (PDFF) detection. • A PDFF threshold of 3.5% may be predictive of paediatric metabolic syndrome.
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- 2014
18. Predicting hepatic steatosis in a racially and ethnically diverse cohort of adolescent girls
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Peter M. Wolfgram, Jennifer L. Rehm, Jens C. Eickhoff, Scott B. Reeder, David B. Allen, and Ellen L. Connor
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medicine.medical_specialty ,Waist ,Adolescent ,Overweight ,Gastroenterology ,Risk Assessment ,Sensitivity and Specificity ,White People ,Article ,Body Mass Index ,chemistry.chemical_compound ,Young Adult ,High-density lipoprotein ,Wisconsin ,Predictive Value of Tests ,Internal medicine ,Nonalcoholic fatty liver disease ,Medicine ,Humans ,Obesity ,Child ,Anthropometry ,Asian ,business.industry ,Fatty liver ,medicine.disease ,Magnetic Resonance Imaging ,Black or African American ,Fatty Liver ,Endocrinology ,Cross-Sectional Studies ,chemistry ,Predictive value of tests ,Pediatrics, Perinatology and Child Health ,Female ,Steatosis ,medicine.symptom ,business ,Body mass index - Abstract
Objective To develop a risk assessment model for early detection of hepatic steatosis using common anthropometric and metabolic markers. Study design This was a cross-sectional study of 134 adolescent and young adult females, age 11-22 years (mean 13.3 ± 2 years) from a middle school and clinics in Madison, Wisconsin. The ethnic distribution was 27% Hispanic and 73% non-Hispanic; the racial distribution was 64% Caucasian, 31% African-American, and 5% Asian, Fasting glucose, fasting insulin, alanine aminotransferase (ALT), body mass index (BMI), waist circumference (WC), and other metabolic markers were assessed. Hepatic fat was quantified using magnetic resonance imaging proton density fat fraction (MR-PDFF). Hepatic steatosis was defined as MR-PDFF >5.5%. Outcome measures were sensitivity, specificity, and positive predictive value (PPV) of BMI, WC, ALT, fasting insulin, and ethnicity as predictors of hepatic steatosis, individually and combined, in a risk assessment model. Classification and regression tree methodology was used to construct a decision tree for predicting hepatic steatosis. Results MR-PDFF revealed hepatic steatosis in 16% of subjects (27% overweight, 3% nonoverweight). Hispanic ethnicity conferred an OR of 4.26 (95% CI, 1.65-11.04; P = .003) for hepatic steatosis. BMI and ALT did not independently predict hepatic steatosis. A BMI >85% combined with ALT >65 U/L had 9% sensitivity, 100% specificity, and 100% PPV. Lowering the ALT value to 24 U/L increased the sensitivity to 68%, but reduced the PPV to 47%. A risk assessment model incorporating fasting insulin, total cholesterol, WC, and ethnicity increased sensitivity to 64%, specificity to 99% and PPV to 93%. Conclusion A risk assessment model can increase specificity, sensitivity, and PPV for identifying the risk of hepatic steatosis and guide the efficient use of biopsy or imaging for early detection and intervention.
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- 2013
19. Ethnic Differences in the Effects of Hepatic Fat Deposition on Insulin Resistance in Non-Obese Middle School Girls
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Jennifer L. Rehm, Ellen L. Connor, David B. Allen, Peter M. Wolfgram, Jens C. Eickhoff, and Scott B. Reeder
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Blood Glucose ,medicine.medical_specialty ,Waist ,Adolescent ,Endocrinology, Diabetes and Metabolism ,medicine.medical_treatment ,Medicine (miscellaneous) ,Article ,White People ,Body Mass Index ,Endocrinology ,Insulin resistance ,Sex hormone-binding globulin ,Internal medicine ,Sex Hormone-Binding Globulin ,medicine ,Humans ,Insulin ,Aspartate Aminotransferases ,Obesity ,Child ,Triglycerides ,Nutrition and Dietetics ,Adiponectin ,biology ,business.industry ,Fatty liver ,Cholesterol, HDL ,nutritional and metabolic diseases ,Alanine Transaminase ,Hispanic or Latino ,medicine.disease ,Fatty Liver ,Cholesterol ,biology.protein ,Female ,Insulin Resistance ,Waist Circumference ,business ,Body mass index ,Biomarkers - Abstract
Objective In nonobese youth, to investigate whether hepatic fat deposition and its metabolic consequences vary between ethnic groups. Design and Methods Thirty-two nonobese girls (12 Hispanic White [H] and 20 non-Hispanic White [NHW] girls), aged 11-14 years old were recruited. Outcome measures were MRI measured hepatic proton density fat fraction (hepatic PDFF), BMI Z-score, waist circumference, fasting insulin, glucose, adiponectin, sex hormone-binding globulin [SHBG], ALT, AST, triglycerides, and HOMA-IR. Results There were no significant differences in mean BMI Z-scores (P = 0.546) or hepatic PDFF (P = 0.275) between H and NHW girls; however, H girls showed significant correlations between hepatic PDFF and markers of IR (fasting insulin, HOMA-IR, adiponectin, SHBG, triglycerides; all P
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- 2013
20. Adipose tissue MRI for quantitative measurement of central obesity
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Catherine D.G. Hines, Aziz H. Poonawalla, Brett P. Sjoberg, Scott B. Reeder, Jennifer L. Rehm, Pablo Irarrazaval, and Diego Hernando
- Subjects
Adult ,Male ,Pathology ,medicine.medical_specialty ,Waist ,Adolescent ,Adipose tissue ,Group comparison ,Intra-Abdominal Fat ,Imaging phantom ,Article ,Body Mass Index ,Young Adult ,medicine ,Image Processing, Computer-Assisted ,Humans ,Radiology, Nuclear Medicine and imaging ,Child ,Metabolic Syndrome ,medicine.diagnostic_test ,business.industry ,Phantoms, Imaging ,nutritional and metabolic diseases ,Reproducibility of Results ,Magnetic resonance imaging ,Middle Aged ,Overweight ,medicine.disease ,Obesity ,Magnetic Resonance Imaging ,Sagittal plane ,medicine.anatomical_structure ,Adipose Tissue ,Obesity, Abdominal ,Regression Analysis ,Manual segmentation ,Female ,Nuclear medicine ,business ,Algorithms - Abstract
Purpose: To validate adipose tissue magnetic resonance imaging (atMRI) for rapid, quantitative volumetry of visceral adipose tissue (VAT) and total adipose tissue (TAT). Materials and Methods: Data were acquired on normal adults and clinically overweight girls with Institutional Review Board (IRB) approval/parental consent using sagittal 6-echo 3D-spoiled gradient-echo (SPGR) (26-sec single-breath-hold) at 3T. Fat-fraction images were reconstructed with quantitative corrections, permitting measurement of a physiologically based fat-fraction threshold in normals to identify adipose tissue, for automated measurement of TAT, and semiautomated measurement of VAT. TAT accuracy was validated using oil phantoms and in vivo TAT/VAT measurements validated with manual segmentation. Group comparisons were performed between normals and overweight girls using TAT, VAT, VAT-TAT-ratio (VTR), body-mass-index (BMI), waist circumference, and waist-hip-ratio (WHR). Results: Oil phantom measurements were highly accurate (
- Published
- 2011
21. Predicting Non-Alcoholic Fatty Liver Disease in a Racially and Ethnically Diverse Cohort of Adolescent Girls
- Author
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Ellen L. Connor, Jens C. Eickhoff, Jennifer L. Rehm, Peter M. Wolfgram, Scott B. Reeder, and David B. Allen
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endocrine system ,medicine.medical_specialty ,Stromal cell ,biology ,business.industry ,Adrenal gland ,Obstetrics and Gynecology ,Ovary ,General Medicine ,medicine.disease ,Human chorionic gonadotropin ,Sex hormone-binding globulin ,Endocrinology ,medicine.anatomical_structure ,Internal medicine ,Pediatrics, Perinatology and Child Health ,biology.protein ,Medicine ,Germ cell tumors ,business ,Germ cell ,Hormone - Abstract
secreting tumors of the adrenal gland and ovary, McCune Albright syndrome, VanWyk-Grumbach syndrome, adrenal gland enzyme deficiencies and exogenous exposure to sex hormones. Sex hormone secreting tumors of the ovary are a rare cause of PPP. Although, it is well known that males can have human chorionic gonadotropin (hcg) secreting germ cell tumors which activate the LH receptors on the testicular Leydig cells resulting in testosterone secretion, the exact mechanism for a germ cell tumor to cause PPP in females is not known. There are case reports of females with mixed GCT/ stromal cell tumors of the ovary presenting with PPP but few describing a solitary GCT. In this case the pathology specimen did not find any component of sex cord tumor nor were the tumor markers associated with sex cord tumors elevated significantly. Based on this case report, it is important to consider GCTs in the differential diagnosis of PPP.
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- 2014
- Full Text
- View/download PDF
22. Differences in Adiposity Influence Vitamin D Levels in Adolescents With PCOS Compared to Overweight Controls
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Ellen L. Connor, David B. Allen, Jennifer L. Rehm, and Jens C. Eickhoff
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medicine.medical_specialty ,business.industry ,Insulin ,medicine.medical_treatment ,Obstetrics and Gynecology ,General Medicine ,Overweight ,medicine.disease ,Impaired fasting glucose ,Impaired glucose tolerance ,Fasting glucose ,Diabetes mellitus ,Internal medicine ,Pediatrics, Perinatology and Child Health ,Vitamin D and neurology ,medicine ,Prediabetes ,medicine.symptom ,business - Abstract
prediabetes and 0-3% for DM2. This study evaluated the prevalence of prediabetes (impaired fasting glucose (IFG) and impaired glucose tolerance (IGT)) and DM2 and associated risk factors in adolescents presenting to a multidisciplinary adolescent PCOS clinic. Methods: Review of database from 2005 to 2010 included 168 patients diagnosed with PCOS based on the Rotterdam criteria. Eleven were excluded due to known diabetes leaving 157 eligible for screening. This study was approved by the University of Wisconsin Internal Review Board. Results: Mean age: 16.1 years (11.5-22), 93.4% Caucasian, 4.7% African American, 2.3% Hispanic. BMI assessment: 12.6 % BMI below the 85%, 74 % above the 95%, and 25% above or equal to 40 kg/m2. Eleven patients presented with known diabetes (3 with type 1, 8 with type 2). Oral glucose tolerance testing was completed by 98 new patients (63%), single fasting glucose +/insulin by 41 (26%), and no datawas available for 19 patients. Of 126 patients with both a fasting glucose and insulin recorded, 73 (58%) had a glucose to insulin ratio less than 4.5.
- Published
- 2012
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23. Non-Alcoholic Fatty Liver Disease in an Adolescent With Polycystic Ovary Syndrome
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Ellen L. Connor, Scott B. Reeder, and Jennifer L. Rehm
- Subjects
Pediatrics ,medicine.medical_specialty ,business.industry ,Fatty liver ,Obstetrics and Gynecology ,Non alcoholic ,General Medicine ,Disease ,medicine.disease ,Polycystic ovary ,Pediatrics, Perinatology and Child Health ,medicine ,Sex organ ,business - Abstract
Results: 960.016 people were hospitalized due to genital prolapse in Brazil from january 2000 to august 2010. From this amount, 4.101 girls from 0 to 19 years old were treated for the disease. 55,3% were between 15 and 19 years old, followed by 19,9% that were between 5 and 9 years old, and by 14,8% that were between 10 and 14 years old. The total value dispended by the SUS for all hospitalizations was US$ 206,603,140.68. From this amount, US$ 711,327.77 were spent in the treatment of cases from 0 to 19 years old. The greatest amount spent with the treatment was with patients from 20 to 49 years old, which was US$ 148,039,394.20, this is where the greatest number of cases occurred.
- Published
- 2011
- Full Text
- View/download PDF
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