Table 4.
Sensitivity analysis.
Study number
HR
95% CI
Heterogeneity test
x
2
P
Fixed effect model
6
1.42
1.16–1.72
9.61
0.087
After excluding non-ovarian cancer articles
4
1.37
0.93–1.99
2.94
0.455
After removing Chinese articles
5
1.41
1.02–1.96
4.08
0.290