Evidence for a Change in the Sex Ratio of Children Referred for Gender Dysphoria: Data From the Gender Identity Development Service in London (2000–2017)
Bibliographic record
Abstract
INTRODUCTION: The prevalence of gender dysphoria in children is not known; however, there are some data on the sex ratio of children referred to specialized gender identity clinics. AIM: We sought to examine the sex ratio of children, and some associated factors (age at referral and year of referral), referred to the Gender Identity Development Service in the United Kingdom, the largest such clinic in the world. METHODS: The sex ratio of children (N = 1,215) referred to the Gender Identity Development Service between 2000-2017 was examined, along with year of referral, age-related patterns, and age at referral. MAIN OUTCOME MEASURE: Sex ratio of birth-assigned boys vs birth-assigned girls. RESULTS: The sex ratio significantly favored birth-assigned boys over birth-assigned girls (1.27:1), but there were also age and year of referral effects. The sex ratio favored birth-assigned boys at younger ages (3-9 years), but favored birth-assigned girls at older ages (10-12 years). The percentage of referred birth-assigned boys significantly decreased when 2 cohorts were compared (2000-2006 vs 2007-2017). On average, birth-assigned boys were referred at a younger age than birth-assigned girls. CLINICAL IMPLICATIONS: The evidence for a change in the sex ratio of children referred for gender dysphoria, particularly in recent years, matches a similar change in the sex ratio of adolescents referred for gender dysphoria. The reasons for this remain understudied. STRENGTH & LIMITATIONS: The United Kingdom data showed both similarities and differences when compared to data from 2 other gender identity clinics for children (Toronto, Ontario, Canada, and Amsterdam, The Netherlands). Such data need to be studied in more gender identity clinics for children, perhaps with the establishment of an international registry. CONCLUSION: Further study of the correlates of the sex ratio for children referred for gender dysphoria will be useful in clinical care and management. de Graaf NM, Carmichael P, Steensma TD, et al. Evidence for a Change in the Sex Ratio of Children Referred for Gender Dysphoria: Data From the Gender Identity Development Service in London (2000-2017). J Sex Med 2018;15:1381-1383.
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How this classification was reachedexpand
Full frame distilled prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.
Codex and Gemma teacher scores by category
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.008 | 0.001 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.002 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.000 | 0.000 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from itClassification
machine, unvalidatedMachine predicted; a candidate call from one teacher head, not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".