Number of studies | Men | Women | Odds Ratio | 95% CI | Test of heterogeneity | |||
---|---|---|---|---|---|---|---|---|
Events | Total | Events | Total | |||||
Rural^{a} | 5 | 3247 | 13,934 | 3339 | 13,277 | 0.91 | 0.86,0.96*** | Q(4) = 1.01, p = 0.91 |
Urban^{a} | 8 | 3669 | 13,990 | 3605 | 14,668 | 1.01 | 0.84,1.22 | Q(7) = 56.32, p < 0.00001 |
Hongkong^{a} | 5 | 1066 | 8041 | 2386 | 12,581 | 0.58 | 0.47,0.72*** | Q(4) = 21.49, p < 0.0003 |
Total | 18 | 7982 | 35,965 | 9330 | 40,526 | 0.84 | 0.74,0.96* | Q(17) = 189.86, p < 0.00001 |
Heterogeneity: τ
^{2} = 0.06, χ
^{2} = 189.86, df = 17 (p < 0.00001), I^{2} = 91% Test of overall effect: Z = 2.58 (p = 0.010) | ||||||||
Test for subgroup difference: 0.06, χ ^{2} = 17.35, df = 2 (p = 0.0002), I^{2} = 88.5% |