Table 2.
OR (95% CI) | P value | PHeterogeneity | Model | |
---|---|---|---|---|
All studies | 0.94 (0.78, 1.10) | P<0.0001 | P<0.0001 | Random-effect model |
Studies with middle patients | 0.90 (0.71, 1.10) | P<0.0001 | P<0.0001 | Random-effect model |
Studies with old patients | 0.96 (0.75, 1.16) | P<0.0001 | P<0.0001 | Random-effect model |