Table 6. Meta-regression1 .

Parameters	Coefficient	Standard errors	t	P>|t|	[95% Conf. Interval]
Disease 2	-0.42	0.25	-1.66	0.112	[-0.94, 0.1]
Disease 3	0.9	0.43	2.06	0.053	[-0.01, 1.82]
Sample size	0.002	0.001	2.16	0.043	[0.001, 0.002]
Age	-0.05	0.03	-1.77	0.092	[-0.115, 0.009]
Constant	3.77	1.69	2.23	0.037	[0.24 , 7.29]
Meta-regression			Number of obs= 25
REML estimate of between-study variance			Tau2 = 0.155
% residual variation due to heterogeneity			I-squared_res = 53.88%
Proportion of between-study variance explained			Adj R-squared = 66.71%
Joint test for all covariates			Model F(4,20) = 6.57
Prob> F			0.0015