Table 9. Meta-regression 4 .

Parameters	Coefficient	Standard errors	t	P>|t|	[95% Conf. Interval]
Disease1	-1.27	0. 49	-2.55	0.017	[-2.3, -0.24]
Disease2	-1.7	0.46	-3.63	0.001	[-2.66, -0.74]
Constant	2.23	0.43	5.18	< 0.001	[1.35, 3.12]
Meta-regression			Number of obs30
REML estimate of between-study variance			Tau2 = 0.4102
% residual variation due to heterogeneity			I-squared_res = 81.40%
The proportion of between-study variance explained Joint test for all covariates Prob> F			Adj R-squared = 31.63% Model F (2,27) = 6.79 = 0.0041