Elna H. Suominen, Calliope A. Chen, Andrew Dunlop, Rob Saunders, William Mandy
(2025).
Sex/Gender Differences in Internalizing Problems of Autistic Children and Young People: A Systematic Review and Meta-Analysis.
Journal of the American Academy of Child & Adolescent Psychiatry.
Elsevier BV.
Abstract
OBJECTIVE: Findings on the presence and direction of a sex/gender difference in internalizing problems for autistic children and young people (CYP) are inconsistent. This systematic review investigated whether autistic boys and girls differ in internalizing problem severity. METHOD: Studies comparing internalizing problems (including depression and anxiety) in autistic boys and girls using validated, continuous measures were included. Medline, Embase, PsycINFO, ASSIA, and Web of Science databases were searched. The Joanna Briggs Institute appraisal checklist for cross-sectional studies was used to assess risk of bias. Random-effects meta-analyses estimated effect size differences for overall internalizing, anxiety symptoms, and depression symptoms between autistic boys and girls. Moderation effects of age, IQ, and study methodology were examined through meta-regression. RESULTS: From 4,093 nonduplicate records, 56 studies were identified (autistic CYP: N = 13,410; girls: n = 3,657; boys: n = 9,753). Autistic girls experienced more anxiety symptoms than boys (Hedges' g = 0.14, 95% CI [0.04, 0.25], p =.010). This effect was larger in community (vs clinic) samples (β =.22, p =.027) and in samples with higher average age (β =.039, p =.010) and IQ (β =.015, p =.001). Autistic girls also showed higher overall internalizing (Hedges' g = 0.10, 95% CI [-0.04, 0.23], p =.148) and depression (Hedges' g = 0.12, 95% CI [-0.01, 0.25], p =.067) symptoms, but these differences did not reach significance. Heterogeneity for all pooled sex/gender differences was high. CONCLUSION: In autistic CYP, girls show more anxiety symptoms than boys, and this is most pronounced in older girls and those with higher IQ. This systematic review did not find strong evidence for sex/gender differences in overall internalizing problems or depression symptoms. However, the high heterogeneity cautions against drawing conclusions with certainty. STUDY REGISTRATION INFORMATION: Systematic Review and Meta-analysis of Sex Differences in Internalising Problems of Autistic Children and Adolescents; https://www.crd.york.ac.uk/PROSPERO/view/CRD42023466929.