Table 2 Meta-regression analysis of included studies for exploration of the sources of heterogeneity
Factors | Coefficient | Standard error | 95% Confidence interval | P |
|---|---|---|---|---|
Disciplines | 0.5787264 | 0.5137159 | -0.4281382 - 1.585591 | 0.26 |
Country | 0.5002787 | 1.474001 | -2.38871 - 3.389267 | 0.734 |
Year | -13.09959 | 177.2125 | -421.7524 - 395.5533 | 0.943 |
Identities | 0.1852473 | 0.737756 | -1.516021 - 1.886516 | 0.808 |