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Results of meta-regression models
| Study level variables | Coefficient (95% CI) | P value | I2 (%) |
|---|---|---|---|
| Age (mean) | 1.02 (0.93 to 1.12) | 0.67 | 96.00 |
| Body mass index (mean) | 0.97 (0.87 to 1.08) | 0.52 | 80.43 |
| Publication year | 1.01 (0.92 to 1.10) | 0.87 | 96.66 |
| Length of follow-up (mean) | 1.00 (0.93 to 1.07) | 0.94 | 96.67 |
