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Dive into the research topics where Baudewijntje P.C. Kreukels is active.

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Featured researches published by Baudewijntje P.C. Kreukels.


Journal of the American Academy of Child and Adolescent Psychiatry | 2013

Factors Associated With Desistence and Persistence of Childhood Gender Dysphoria: A Quantitative Follow-Up Study

Thomas D. Steensma; Jenifer K. McGuire; Baudewijntje P.C. Kreukels; Anneke J. Beekman; Peggy T. Cohen-Kettenis

OBJECTIVE To examine the factors associated with the persistence of childhood gender dysphoria (GD), and to assess the feelings of GD, body image, and sexual orientation in adolescence. METHOD The sample consisted of 127 adolescents (79 boys, 48 girls), who were referred for GD in childhood (<12 years of age) and followed up in adolescence. We examined childhood differences among persisters and desisters in demographics, psychological functioning, quality of peer relations and childhood GD, and adolescent reports of GD, body image, and sexual orientation. We examined contributions of childhood factors on the probability of persistence of GD into adolescence. RESULTS We found a link between the intensity of GD in childhood and persistence of GD, as well as a higher probability of persistence among natal girls. Psychological functioning and the quality of peer relations did not predict the persistence of childhood GD. Formerly nonsignificant (age at childhood assessment) and unstudied factors (a cognitive and/or affective cross-gender identification and a social role transition) were associated with the persistence of childhood GD, and varied among natal boys and girls. CONCLUSION Intensity of early GD appears to be an important predictor of persistence of GD. Clinical recommendations for the support of children with GD may need to be developed independently for natal boys and for girls, as the presentation of boys and girls with GD is different, and different factors are predictive for the persistence of GD.


The Journal of Sexual Medicine | 2015

Evidence for an altered sex ratio in clinic-referred adolescents with gender dysphoria.

Madison Aitken; Thomas D. Steensma; Ray Blanchard; Doug P. VanderLaan; Hayley Wood; Amanda Fuentes; Cathy Spegg; Lori Wasserman; Megan Ames; C. Lindsay Fitzsimmons; Jonathan H. Leef; Victoria Lishak; Elyse Reim; Anna Takagi; Julia Vinik; Julia Wreford; Peggy T. Cohen-Kettenis; Annelou L. C. de Vries; Baudewijntje P.C. Kreukels; Kenneth J. Zucker

INTRODUCTION The number of adolescents referred to specialized gender identity clinics for gender dysphoria appears to be increasing and there also appears to be a corresponding shift in the sex ratio, from one favoring natal males to one favoring natal females. AIM We conducted two quantitative studies to ascertain whether there has been a recent inversion of the sex ratio of adolescents referred for gender dysphoria. METHODS The sex ratio of adolescents from two specialized gender identity clinics was examined as a function of two cohort periods (2006-2013 vs. prior years). Study 1 was conducted on patients from a clinic in Toronto, and Study 2 was conducted on patients from a clinic in Amsterdam. RESULTS Across both clinics, the total sample size was 748. In both clinics, there was a significant change in the sex ratio of referred adolescents between the two cohort periods: between 2006 and 2013, the sex ratio favored natal females, but in the prior years, the sex ratio favored natal males. In Study 1 from Toronto, there was no corresponding change in the sex ratio of 6,592 adolescents referred for other clinical problems. CONCLUSIONS Sociological and sociocultural explanations are offered to account for this recent inversion in the sex ratio of adolescents with gender dysphoria.


British Journal of Psychiatry | 2014

Psychiatric characteristics in transsexual individuals: multicentre study in four European countries

Gunter Heylens; Els Elaut; Baudewijntje P.C. Kreukels; Muirne C. S. Paap; Susanne Cerwenka; Hertha Richter-Appelt; Peggy T. Cohen-Kettenis; Ira Haraldsen; Griet De Cuypere

BACKGROUND Research into the relationship between gender identity disorder and psychiatric problems has shown contradictory results. AIMS To investigate psychiatric problems in adults fulfilling DSM-IV-TR criteria for a diagnosis of gender identity disorder. METHOD Data were collected within the European Network for the Investigation of Gender Incongruence using the Mini International Neuropsychiatric Interview - Plus and the Structured Clinical Interview for DSM-IV Axis II Disorders (n = 305). RESULTS In 38% of the individuals with gender identity disorder a current DSM-IV-TR Axis I diagnosis was found, mainly affective disorders and anxiety disorders. Furthermore, almost 70% had a current and lifetime diagnosis. All four countries showed a similar prevalence, except for affective and anxiety disorders, and no difference was found between individuals with early-onset and late-onset disorder. An Axis II diagnosis was found in 15% of all individuals with gender identity disorder, which is comparable to the general population. CONCLUSIONS People with gender identity disorder show more psychiatric problems than the general population; mostly affective and anxiety problems are found.


Clinical Breast Cancer | 2008

Persistent Neurocognitive Problems After Adjuvant Chemotherapy for Breast Cancer

Baudewijntje P.C. Kreukels; Frits S.A.M. van Dam; K. Richard Ridderinkhof; Willem Boogerd; Sanne B. Schagen

BACKGROUND Neurocognitive problems have been observed in a number of women previously treated with adjuvant chemotherapy for breast cancer. The present study aims to combine the results of neuropsychological and electrophysiological techniques collected in patients with breast cancer treated with cyclophosphamide/methotrexate/5-fluorouracil (CMF) at different time points. PATIENTS AND METHODS Patients with breast cancer treated with adjuvant CMF chemotherapy (n = 63) were examined with neuropsychological tests 1 year after treatment and compared with healthy women (n = 60; T1 portion of the study). Based on neuropsychological test performance, patients were classified as cognitively impaired or unimpaired. Four years later, behavioral and neurophysiological measures (T2 portion of the study) were collected during an information-processing task in a subgroup of patients (n = 26). At T2, we compared the results of cognitively impaired patients (n = 8) with those of patients classified as cognitively unimpaired at T1 (n = 18). RESULTS In the initial neuropsychological assessment, 33.3% of the patients were classified as cognitively impaired, compared with 10% of healthy women. At T2, impaired patients who received CMF showed longer P3 latencies, lower P3 amplitudes, longer reaction times, and made more errors in an information processing task compared with unimpaired patients who received CMF. CONCLUSION The results indicate the persistence of neurocognitive problems < or = 5 years after completion of chemotherapy and consistency across different assessment techniques.


Annual Review of Clinical Psychology | 2016

Gender Dysphoria in Adults

Kenneth J. Zucker; Anne A. Lawrence; Baudewijntje P.C. Kreukels

Gender dysphoria (GD), a term that denotes persistent discomfort with ones biologic sex or assigned gender, replaced the diagnosis of gender identity disorder in the Diagnostic and Statistical Manual of Mental Disorders in 2013. Subtypes of GD in adults, defined by sexual orientation and age of onset, have been described; these display different developmental trajectories and prognoses. Prevalence studies conclude that fewer than 1 in 10,000 adult natal males and 1 in 30,000 adult natal females experience GD, but such estimates vary widely. GD in adults is associated with an elevated prevalence of comorbid psychopathology, especially mood disorders, anxiety disorders, and suicidality. Causal mechanisms in GD are incompletely understood, but genetic, neurodevelopmental, and psychosocial factors probably all contribute. Treatment of GD in adults, although largely standardized, is likely to evolve in response to the increasing diversity of persons seeking treatment, demands for greater client autonomy, and improved understanding of the benefits and limitations of current treatment modalities.


Journal of Abnormal Child Psychology | 2014

Behavioral and emotional problems on the teacher's report form: A cross-national, cross-clinic comparative analysis of gender dysphoric children and adolescents

Thomas D. Steensma; Kenneth J. Zucker; Baudewijntje P.C. Kreukels; Doug P. VanderLaan; Hayley Wood; Amanda Fuentes; Peggy T. Cohen-Kettenis

For gender dysphoric children and adolescents, the school environment may be challenging due to peer social ostracism and rejection. To date, information on the psychological functioning and the quality of peer relations in gender dysphoric children and adolescents has been studied via parental report, peer sociometric methods, and social interactions in laboratory play groups. The present study was the first cross-national investigation that assessed behavior and emotional problems and the quality of peer relations, both measured by the Teacher’s Report Form (TRF), in a sample of 728 gender dysphoric patients (554 children, 174 adolescents), who were referred to specialized gender identity clinics in the Netherlands and Canada. The gender dysphoric adolescents had significantly more teacher-reported emotional and behavioral problems than the gender dysphoric children. In both countries, gender dysphoric natal boys had poorer peer relations and more internalizing than externalizing problems compared to the gender dysphoric natal girls. Furthermore, there were significant between-clinic differences: both the children and the adolescents from Canada had more emotional and behavioral problems and a poorer quality of peer relations than the children and adolescents from the Netherlands. In conclusion, gender dysphoric children and adolescents showed the same pattern of emotional and behavioral problems in both countries. The extent of behavior and emotional problems was, however, higher in Canada than in the Netherlands, which appeared, in part, an effect of a poorer quality of peer relations. Per Bronfenbrenner’s (American Psychologist, 32, 513–531, 1977) ecological model of human development and well-being, we consider various interpretations of the cross-national, cross-clinic differences on TRF behavior problems at the level of the family, the peer group, and the culture at large.


Archives of Sexual Behavior | 2016

Body Satisfaction and Physical Appearance in Gender Dysphoria

Tim C. van de Grift; Peggy T. Cohen-Kettenis; Thomas D. Steensma; Griet De Cuypere; Hertha Richter-Appelt; Ira Haraldsen; Rieky E. G. Dikmans; Susanne Cerwenka; Baudewijntje P.C. Kreukels

Gender dysphoria (GD) is often accompanied by dissatisfaction with physical appearance and body image problems. The aim of this study was to compare body satisfaction with perceived appearance by others in various GD subgroups. Data collection was part of the European Network for the Investigation of Gender Incongruence. Between 2007 and 2012, 660 adults who fulfilled the criteria of the DSM-IV gender identity disorder diagnosis (1.31:1 male-to-female [MtF]:female-to-male [FtM] ratio) were included into the study. Data were collected before the start of clinical gender-confirming interventions. Sexual orientation was measured via a semi-structured interview whereas onset age was based on clinician report. Body satisfaction was assessed using the Body Image Scale. Congruence of appearance with the experienced gender was measured by means of a clinician rating. Overall, FtMs had a more positive body image than MtFs. Besides genital dissatisfaction, problem areas for MtFs included posture, face, and hair, whereas FtMs were mainly dissatisfied with hip and chest regions. Clinicians evaluated the physical appearance to be more congruent with the experienced gender in FtMs than in MtFs. Within the MtF group, those with early onset GD and an androphilic sexual orientation had appearances more in line with their gender identity. In conclusion, body image problems in GD go beyond sex characteristics only. An incongruent physical appearance may result in more difficult psychological adaptation and in more exposure to discrimination and stigmatization.


Current Opinion in Endocrinology, Diabetes and Obesity | 2016

Advancing methods for US transgender health research

Sari L. Reisner; Madeline B. Deutsch; Shalender Bhasin; Walter Bockting; George R. Brown; Jamie L Feldman; Robert Garofalo; Baudewijntje P.C. Kreukels; Asa Radix; Joshua D. Safer; Vin Tangpricha; Guy T'Sjoen; Michael Goodman

Purpose of reviewThis article describes methodological challenges, gaps, and opportunities in US transgender health research. Recent findingsLack of large prospective observational studies and intervention trials, limited data on risks and benefits of sex affirmation (e.g., hormones and surgical interventions), and inconsistent use of definitions across studies hinder evidence-based care for transgender people. Systematic high-quality observational and intervention-testing studies may be carried out using several approaches, including general population-based, health systems-based, clinic-based, venue-based, and hybrid designs. Each of these approaches has its strength and limitations; however, harmonization of research efforts is needed. Ongoing development of evidence-based clinical recommendations will benefit from a series of observational and intervention studies aimed at identification, recruitment, and follow-up of transgender people of different ages, from different racial, ethnic, and socioeconomic backgrounds and with diverse gender identities. SummaryTransgender health research faces challenges that include standardization of lexicon, agreed upon population definitions, study design, sampling, measurement, outcome ascertainment, and sample size. Application of existing and new methods is needed to fill existing gaps, increase the scientific rigor and reach of transgender health research, and inform evidence-based prevention and care for this underserved population.


Current Opinion in Endocrinology, Diabetes and Obesity | 2016

Research priorities for gender nonconforming/transgender youth: gender identity development and biopsychosocial outcomes.

Johanna Olson-Kennedy; Peggy T. Cohen-Kettenis; Baudewijntje P.C. Kreukels; Robert Garofalo; Walter J. Meyer; Stephen M. Rosenthal

Purpose of reviewThe review summarizes relevant research focused on prevalence and natural history of gender nonconforming/transgender youth, and outcomes of currently recommended clinical practice guidelines. This review identifies gaps in knowledge, and provides recommendations foci for future research. Recent findingsIncreasing numbers of gender nonconforming youth are presenting for care. Clinically useful information for predicting individual psychosexual development pathways is lacking. Transgender youth are at high risk for poor medical and psychosocial outcomes. Longitudinal data examining the impact of early social transition and medical interventions are sparse. Existing tools to understand gender identity and quantify gender dysphoria need to be reconfigured to study a more diverse cohort of transgender individuals. Increasingly, biomedical data are beginning to change the trajectory of scientific investigation. SummaryExtensive research is needed to improve understanding of gender dysphoria, and transgender experience, particularly among youth. Recommendations include identification of predictors of persistence of gender dysphoria from childhood into adolescence, and a thorough investigation into the impact of interventions for transgender youth. Finally, examining the social environments of transgender youth is critical for the development of appropriate interventions necessary to improve the lives of transgender people.


Psychoneuroendocrinology | 2015

Regional volumes and spatial volumetric distribution of gray matter in the gender dysphoric brain

Elseline Hoekzema; Sebastian E.E. Schagen; Baudewijntje P.C. Kreukels; Dick J. Veltman; Peggy T. Cohen-Kettenis; Henriette Delemarre-van de Waal; Julie Bakker

The sexual differentiation of the brain is primarily driven by gonadal hormones during fetal development. Leading theories on the etiology of gender dysphoria (GD) involve deviations herein. To examine whether there are signs of a sex-atypical brain development in GD, we quantified regional neural gray matter (GM) volumes in 55 female-to-male and 38 male-to-female adolescents, 44 boys and 52 girls without GD and applied both univariate and multivariate analyses. In girls, more GM volume was observed in the left superior medial frontal cortex, while boys had more volume in the bilateral superior posterior hemispheres of the cerebellum and the hypothalamus. Regarding the GD groups, at whole-brain level they differed only from individuals sharing their gender identity but not from their natal sex. Accordingly, using multivariate pattern recognition analyses, the GD groups could more accurately be automatically discriminated from individuals sharing their gender identity than those sharing their natal sex based on spatially distributed GM patterns. However, region of interest analyses indicated less GM volume in the right cerebellum and more volume in the medial frontal cortex in female-to-males in comparison to girls without GD, while male-to-females had less volume in the bilateral cerebellum and hypothalamus than natal boys. Deviations from the natal sex within sexually dimorphic structures were also observed in the untreated subsamples. Our findings thus indicate that GM distribution and regional volumes in GD adolescents are largely in accordance with their respective natal sex. However, there are subtle deviations from the natal sex in sexually dimorphic structures, which can represent signs of a partial sex-atypical differentiation of the brain.

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Thomas D. Steensma

VU University Medical Center

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Ira Haraldsen

Oslo University Hospital

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Dick J. Veltman

VU University Medical Center

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Els Elaut

Ghent University Hospital

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Cornelis B. Lambalk

VU University Medical Center

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