| No. of studies | OR (95% CI) | P of OR | P of heterogeneity | OR (95% CI) | P of OR | P of heterogeneity |
---|---|---|---|---|---|---|---|
ϵ4 versus ϵ3 | ϵ2 versus ϵ3 | ||||||
All | 11 | 1.42 (1.21,1.67) | <0.001 | 0.09 | 1.18 (0.96,1.44) | 0.11 | 0.29 |
Asians | 6 | 1.52 (1.20,1.93) | <0.001 | 0.05 | 1.11 (0.83,1.47) | 0.47 | 0.25 |
Caucasians | 5 | 1.34 (1.07,1.66) | 0.009 | 0.32 | 1.26 (0.94,1.68) | 0.12 | 0.28 |