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Table 3 Studies of PCOS and ovarian cancer risk

From: Polycystic ovary syndrome and risk of endometrial, ovarian, and breast cancer: a systematic review

Author Year Study design Ovarian Cancer Cases (n) Overall result RR (95% CI)
Harris 2016 Case–control (US) 1513 1.0 (0.60–1.5)
Gottschau 2015 Registry Cohort (Danish) 10 1.8 (0.8–3.2)a
Shen 2015 Registry Cohort (Taiwan) 11 1.0 (0.2–4.6)a
Barryb 2014 Meta-analysis 3363 1.4 (0.9–2.2)a
Bodmer 2011 Case–control (UK) 1611 1.6 (0.7–4.1)a
Brintonc 2010 Cohort (US) 12 1.8 (0.9–3.1)a
Olsen 2008 Case–control (Australia) 1276 1.1 (0.6–2.0)
Schildkraut 1996 Case–control (US) 476 2.4 (1.0–5.9)a
Rossing 1994 Cohort (US) 11 2.4 (0.2–22.5)
  1. a Effect estimate not adjusted for BMI
  2. b This meta-analysis includes the studies by Bodmer, Olsen, and Schildkraut
  3. c In this study, androgen excess or menstrual disorders was evaluated rather than PCOS