| Analytical method | Results |
| Inverse variance Relative Risk Fixed‐effect model | 0.89 (95% CI 0.76 to 1.05), P = 0.18, I2 = 15% |
| Inverse variance Relative Risk Random‐effects model | 0.72 (95% CI 0.55 to 0.95), P = 0.02, I2 = 15% |
| Inverse variance Odds Ratio Fixed‐effects model | 0.87 (95% CI 0.72 to 1.05), P = 0.14, I2 = 20% |
| Inverse variance Odd's Ratio Random‐effects model | 0.67 (95% CI 0.49 to 0.92), P = 0.01, I2 = 20% |
| Peto Odd's Ratio | 0.83 (95% CI 0.69 to 1.00), P = 0.05, I2 = 37% |
| MH Odd's ratio Fixed‐effect model | 0.83 (95% CI 0.69 to 1.00), P = 0.05, I2 = 21% |
| MH Odd's ratio Random‐effects model | 0.67 (95% CI 0.49 to 0.92), P = 0.01, I2 = 21% |
| MH Relative Risk Fixed‐effect model | 0.85 (95% CI 0.73 to 1.00), P = 0.05, I2 = 16% |
| MH Relative Risk Random‐effects model | 0.72 (95% CI 0.55 to 0.95), P = 0.02, I2 = 16% |
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