Table 3 Meta-regression analysis of factors affecting between-study heterogeneity
Source of heterogeneity | Coef | Std. Err | Z | P >|z| | [95% Conf. Interval] |
|---|---|---|---|---|---|
Year of publication | 2.868348 | .8107 | 3.54 | 0.000 | 1.279406 4.457291 |
Sample size | -.0003462 | .0003429 | -0.01 | 0.313 | -.0010184 .0003259 |