Table 7.

Meta-regression: Gender.

Main results for model 2: random effects (MM), Z-distribution, fisher's Z
Covariate	Coefficient	Standard error	95% lower	95% upper	Z-value	2-sided P-value	VIF
Intercept	0.440	0.034	0.373	0.507	12.82	0.0000	1.757
Male	0.002	0.001	0.000	0.005	2.06	0.0396	48.028
Female	−0.003	0.001	−0.005	0.000	−2.34	0.0195	48.028
Statistics for Model 2
Test of the model: Simultaneous test that all coefficients (excluding intercept) are zero
Q = 8.54, df = 2, p = 0.0140
Goodness of fit: Test to determine if unexplained variance is zero
Tau2 = 0.008, Tau = 0.088, I2 = 66.77%, Q = 54.16, df = 18, p = 0.0000
Comparison of Model 2 with the null model
Total variance between studies (intercept only)
Tau2 = 0.015, Tau = 0.124, I2 = 83.24%, Q = 119.35, df = 20, p = 0.0000
Proportion of total between-study variance explained by Model 2
R2 analog = 0.49