Table 4 Summary relative risks for hysterectomy and ovarian cancer by selected characteristics
From: Tubal ligation, hysterectomy and ovarian cancer: A meta-analysis
Number of contributing studies | Random-effects RR (95%CI) | |
|---|---|---|
Study design | 24 studies | |
Cohort study | 0.73 (0.63, 0.85) | |
Case-control study | 0.73 (0.62, 0.86) | |
Geographic location | 24 studies | |
US | 0.81 (0.67, 0.97) | |
Non-US | 0.70 (0.59, 0.84) | |
Type of hysterectomy | 24 studies | |
With unilateral oophorectomy | 0.60 (0.47, 0.78) | |
Without oophorectomy | 0.62 (0.49, 0.79) | |
Unknown oophorectomy | 0.83 (0.71, 0.98) | |
Age at hysterectomy | 5 studies | |
<40/45 years of age | 0.70 (0.55, 0.89) | |
40/45+ years of age | 0.83 (0.72, 0.96) | |
Years since hysterectomy | 7 studies | |
<10 years | 0.69 (0.60, 0.79) | |
10+ years | 0.77 (0.66, 0.89) |