Disease/Condition | Studies | Pooled risk estimate | I2statistic |
---|---|---|---|
Unadjusted | Â | Â | Â |
 Head and neck cancer | 4 | 2.72 (2.20, 3.37) | 0% |
 Female breast cancer | 5 | 0.78 [0.67, 0.91] | 53% |
 Stroke | 5 | 1.84 [1.33, 2.56] | 59% |
Adjusted | Â | Â | Â |
 Head and neck cancer | 6 | 1.40 [1.18, 1.66] | 0% |
 Female breast cancer | 7 | 1.04 [0.85, 1.27] | 73% |
 Stroke | 5 | 1.65 [1.13, 2.41] | 67% |