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- W2050026469 abstract "Objectives To re-estimate the association between methylenetetrahydrofolate reductase gene (MTHFR) C677T polymorphism and polycystic ovary syndrome (PCOS) risk by critically reviewing, analyzing and updating the current evidence. MTHFR C677T polymorphism has been studied as a possible risk factor for a variety of common conditions including heart disease, stroke and hypertension. Its association with PCOS was negative in a previous meta-analysis which had possible shortcomings. More studies have now been done but their results remain inconclusive. Study design Available case-control studies containing genotype frequencies of MTHFR C677T were chosen, and odds ratio (OR) with 95% confidence interval (CI) was used to assess the strength of the association. Statistical analyses were performed using software Review Manager (Version 5. 2) and Stata (Version 11.0). Results Nine case-control studies including 638 PCOS and 759 healthy controls were identified. Meta-analysis showed a significant effect in the dominant model (TT+CT vs. CC: OR = 1.65, 95%CI = 1.28–2.12, P < 0.0001) and heterozygote comparison (CT vs. CC: OR = 1.83, 95%CI = 1.17–2.87, P = 0.008). In subgroup analysis stratified by ethnicity, MTHFR C677T variant was statistically significantly relevant to PCOS risk in European populations (TT+CT vs. CC: OR = 2.16, 95%CI = 1.50–3.12, P < 0.0001; CT vs. CC: OR = 2.11, 95%CI = 1.15–3.87, P = 0.02) but not in Asian populations (TT+CT vs. CC: OR = 1.29, 95%CI = 0.91–1.82, P = 0.15; CT vs. CC: OR = 1.31, 95%CI = 0.91–1.90, P = 0.15). Conclusions This meta-analysis indicates that the 677T allele increases PCOS susceptibility, and this relevance seems to be more intense in Europeans than in Asians." @default.
- W2050026469 created "2016-06-24" @default.
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- W2050026469 date "2014-01-01" @default.
- W2050026469 modified "2023-10-18" @default.
- W2050026469 title "Association of methylenetetrahydrofolate reductase gene C677T polymorphism with polycystic ovary syndrome risk: a systematic review and meta-analysis update" @default.
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- W2050026469 doi "https://doi.org/10.1016/j.ejogrb.2013.10.001" @default.
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