PCOS Prevalence: Study Quality, Age & Geography Impact
Global Prevalence of Polycystic Ovary Syndrome: A Systematic Review and Meta-Analysis
Table of Contents
Polycystic ovary syndrome (PCOS) is a common hormonal disorder affecting women of reproductive age. Despite its prevalence and important impact on health, a extensive understanding of its global distribution has been lacking.This article delves into a recent systematic review and meta-analysis published in The Journal of Clinical Endocrinology & Metabolism (July 2025), offering crucial insights into the worldwide prevalence of PCOS and highlighting the importance of standardized diagnostic criteria and study quality.
Understanding PCOS and the need for Global Data
PCOS is characterized by a combination of symptoms including irregular periods,excess androgen levels,and/or polycystic ovaries. It can lead to a range of health problems, including infertility, metabolic syndrome, and an increased risk of cardiovascular disease. The impact extends beyond physical health, often affecting mental well-being and quality of life.
Tho, pinpointing the exact prevalence of PCOS has been challenging. Variations in diagnostic criteria, study methodologies, and geographical depiction have contributed to a fragmented understanding. Reliable global epidemiological data is essential for informing public health strategies, allocating resources, and improving patient care. This is where the recent research takes a significant step forward.
A Comprehensive Review of Existing Research
Researchers conducted a thorough search of PubMed and Embase databases, analyzing 88 studies encompassing data from over 561,000 women. The studies were evaluated using a newly developed tool, the PCOS Epidemiology and Phenotype (PEP) tool, designed to assess study quality specifically within the context of PCOS research. This is a critical advancement, as customary epidemiological assessment tools may not fully capture the nuances of PCOS studies.
The analysis focused on three commonly used diagnostic criteria:
Rotterdam criteria: The most widely used criteria, requiring at least two out of three features: irregular ovulation, signs of androgen excess, and polycystic ovaries.
Androgen Excess and PCOS Society (AE-PCOS) criteria: Emphasizes hyperandrogenism (excess male hormones) as a primary feature.
National Institutes of Health (NIH) criteria: Focuses on irregular periods and evidence of hyperandrogenism.
Key Findings: Global Prevalence Rates
the study revealed significant variations in PCOS prevalence depending on the diagnostic criteria used. Here’s a breakdown of the key findings:
Overall Prevalence: Using high-quality studies (as determined by the PEP tool), the prevalence rates were:
Rotterdam criteria: 10.89%
AE-PCOS criteria: 10.61%
NIH criteria: 6.63%
Regional Variations: While some regional differences were observed, particularly with the NIH and Rotterdam criteria, these were not statistically significant when considering only high-quality studies. Prevalence ranged from 5.72% in the Eastern Mediterranean Region (EMR) to 6.90% in the Western Pacific Region (WPR) using NIH criteria, and from 9.12% in the EMR to 11.15% in South-East Asia using Rotterdam criteria. Notably, no studies were available from the African Region, highlighting a critical gap in our understanding.
* Age-Related Differences: A higher prevalence of PCOS was observed in adults (8.52%) compared to adolescents (4.44%) when using NIH criteria. This difference became less pronounced when focusing on high-quality studies (7.25% vs 4.44%). Data for age-group comparisons using Rotterdam and AE-PCOS criteria were limited.
The Importance of Diagnostic Criteria and Study Quality
This meta-analysis underscores the significant impact of diagnostic criteria on reported PCOS prevalence.The Rotterdam criteria, being the most inclusive, generally yield higher prevalence estimates. The AE-PCOS criteria, with its emphasis on hyperandrogenism, tends to identify a more specific subgroup of women with PCOS.
Moreover, the study highlights the crucial role of study quality. The newly developed PEP tool proved valuable in identifying and prioritizing high-quality studies, leading to more reliable prevalence estimates. This emphasizes the need for rigorous methodology and standardized approaches in future PCOS research. Using the PEP tool allows researchers to better account for potential biases