Prevalence and accurate diagnosis of polycystic ovary syndrome in adolescents across world regions: a systematic review and meta-analysis.

Objectives: To examine the global prevalence of polycystic ovary syndrome (PCOS) among adolescents across world regions, comparing the 2003 Rotterdam consensus criteria with the current International Evidence-based PCOS Guideline criteria which omits polycystic ovarian morphology (PCOM).

Design: Systematic review and meta-analysis, Prospero CRD42022372029.

Methods: OVID MEDLINE, All EBM, PsycInfo, EMBASE, and CINAHL were searched from 1990 to November 2023 for studies assessing the prevalence of PCOS in unselected adolescent populations.

Results: Overall, 15 708 articles were identified. After removal of duplicates, 11 868 titles and abstracts and 445 full texts were assessed. Of these, 24 articles reporting on 23 studies from five world regions were included. In meta-analysis of 20 studies (n = 14 010 adolescents), global prevalence was 9.8% (95% CI 7.2, 12.3) according to original Rotterdam criteria, and 6.3% (95% CI 3.9, 8.8) according to International Evidence-based Guideline criteria. Global PCOS prevalence based on self-report was 9.8% (95% CI 5.5, 14.1). Grouped by WHO region, prevalence ranged from 2.9% (95% CI 2.0, 3.9) in the Western Pacific region to 11.4% (95% CI 7.1, 15.7) in the South-East Asia region according to guideline criteria.

Conclusion: This paramount global meta-analysis on adolescent PCOS diagnosis directly informed the 2023 International PCOS Guideline. Guideline criteria generated a global PCOS prevalence of 6.3%, compared with 9.8% on Rotterdam criteria (including PCOM). Excluding PCOM, which overlaps with normal pubertal transition, is expected to deter over-diagnosis. To avoid under-diagnosis, the Guideline recommends identifying those with either irregular cycles or hyperandrogenism as being "at risk"; this group should undergo longitudinal serial evaluations until adulthood.