PMID- 34176074 OWN - NLM STAT- MEDLINE DCOM- 20211025 LR - 20211025 IS - 1559-0100 (Electronic) IS - 1355-008X (Linking) VI - 74 IP - 2 DP - 2021 Nov TI - Risk of type 2 diabetes mellitus in polycystic ovary syndrome is associated with obesity: a meta-analysis of observational studies. PG - 245-253 LID - 10.1007/s12020-021-02801-2 [doi] AB - PURPOSE: The exact risk of type 2 diabetes mellitus (T2DM) in women with polycystic ovary syndrome (PCOS) is unknown. It is also unclear if obesity independently increases T2DM risk in this population. The aim of this study was to systematically review and synthesize the best available evidence regarding the association between PCOS and T2DM, stratified according to obesity status. METHODS: A comprehensive search was conducted in PubMed, CENTRAL and Scopus databases up to October 31, 2020. Data are expressed as relative risk (RR) with 95% confidence interval (CI). The I(2) index was employed for heterogeneity. RESULTS: The eligibility criteria were fulfilled by 23 studies (319,780 participants; 60,336 PCOS and 8847 type 2 diabetes cases). Women with PCOS demonstrated a higher risk of T2DM than those without PCOS (RR 3.45, 95% CI, 2.95-4.05, p < 0.001; I(2) 81.6%). This risk remained significant both in studies matched or unmatched for participants' age. With regard to body mass index (BMI), the RR for developing T2DM in obese and non-obese PCOS women compared with their non-PCOS counterparts was 3.24 (95% CI 2.25-4.65; p < 0.001; I(2) 30.9%) and 1.62 (95% CI 0.14-18.50; p = 0.70; I(2) 89.9%), respectively. The RR for developing T2DM was 3.85 (95% CI 1.99-7.43; p < 0.001; I(2) 46.2%) in obese compared with non-obese women with PCOS. This was also the case for overweight compared with lean women with PCOS. CONCLUSIONS: Women with PCOS present an increased risk of T2DM compared with non-PCOS women only if they are obese/overweight. CI - (c) 2021. The Author(s), under exclusive licence to Springer Science+Business Media, LLC, part of Springer Nature. FAU - Anagnostis, Panagiotis AU - Anagnostis P AUID- ORCID: 0000-0002-8949-4312 AD - Unit of Reproductive Endocrinology, 1st Department of Obstetrics and Gynecology, Medical School, Aristotle University of Thessaloniki, Thessaloniki, Greece. anagnwstis.pan@yahoo.gr. FAU - Paparodis, Rodis D AU - Paparodis RD AD - Center for Diabetes and Endocrine Research, University of Toledo College of Medicine and Life Sciences, Toledo, OH, USA. FAU - Bosdou, Julia K AU - Bosdou JK AD - Unit for Human Reproduction, 1st Department of Obstetrics and Gynecology, Medical School, Aristotle University of Thessaloniki, Thessaloniki, Greece. FAU - Bothou, Christina AU - Bothou C AD - Department of Endocrinology, Diabetology and Clinical Nutrition, University Hospital Zurich (USZ) and University of Zurich (UZH), Zurich, Switzerland. FAU - Macut, Djuro AU - Macut D AD - Clinic for Endocrinology, Diabetes and Metabolic Diseases, Faculty of Medicine, University of Belgrade, Belgrade, Serbia. FAU - Goulis, Dimitrios G AU - Goulis DG AD - Unit of Reproductive Endocrinology, 1st Department of Obstetrics and Gynecology, Medical School, Aristotle University of Thessaloniki, Thessaloniki, Greece. FAU - Livadas, Sarantis AU - Livadas S AD - Endocrine Unit, Metropolitan Hospital, Athens, Greece. LA - eng PT - Journal Article PT - Meta-Analysis DEP - 20210626 PL - United States TA - Endocrine JT - Endocrine JID - 9434444 SB - IM MH - Body Mass Index MH - *Diabetes Mellitus, Type 2/epidemiology/etiology MH - Female MH - Humans MH - Obesity/complications/epidemiology MH - Overweight MH - *Polycystic Ovary Syndrome/complications/epidemiology OTO - NOTNLM OT - Obesity OT - PCOS OT - Polycystic ovary syndrome OT - Type 2 diabetes mellitus EDAT- 2021/06/28 06:00 MHDA- 2021/10/26 06:00 CRDT- 2021/06/27 21:09 PHST- 2021/04/26 00:00 [received] PHST- 2021/06/13 00:00 [accepted] PHST- 2021/06/28 06:00 [pubmed] PHST- 2021/10/26 06:00 [medline] PHST- 2021/06/27 21:09 [entrez] AID - 10.1007/s12020-021-02801-2 [pii] AID - 10.1007/s12020-021-02801-2 [doi] PST - ppublish SO - Endocrine. 2021 Nov;74(2):245-253. doi: 10.1007/s12020-021-02801-2. Epub 2021 Jun 26.