1. Meta‐regression.
| Estimate | SE | 95% CI | P value | ||
| Lower | Upper | ||||
| Intercept | ‐29.5401 | 26.5608 | ‐81.5983 | 22.5181 | 0.2661 |
| Year | 0.0147 | 0.0133 | ‐0.0114 | 0.0408 | 0.2706 |
| Chinese | 64.7592 | 120.7041 | ‐171.8166 | 301.3349 | 0.5916 |
| Year*Chinese (interaction) | ‐0.0326 | 0.0603 | ‐0.1508 | 0.0857 | 0.5895 |
tau² (estimated amount of residual heterogeneity): 0.8884 (SE = 0.4106)
tau (square root of estimated tau² value): 0.9426
I² (residual heterogeneity / unaccounted variability): 97.91%
H² (unaccounted variability / sampling variability): 47.80%
R² (amount of heterogeneity accounted for): 0.00%