Moderator | No. of studies | Slope | 95% CI | P-value | R2 (%) |
---|---|---|---|---|---|
Publication year | 6 | 0.7637 | 0.0811 to 1.4462 | 0.028 | 44.40 |
Sample size | 6 | − 0.0002 | − 0.0007 to 0.0003 | 0.379 | 0 |
Mean age | 6 | 0.0485 | − 0.1024 to 0.1994 | 0.528 | 0 |
Male % | 6 | 0.0113 | − 0.0485 to 0.0710 | 0.711 | 0 |