Table 3.

Meta-regression analyses result

lnhr	Coef.	Std. Err.	t	P > |t|	[95% Conf. Interval]
Age	.2187126	.1562825	1.40	0.171	−.0988917	.5363169
Study period	.3282157	.1214176	2.70	0.011	.0814654	.574966
Diagnostic criteria	−.1795994	.1203679	−1.49	0.145	−.4242164	.0650176
Constant	−3.146882	.5048756	−6.23	0.000	−4.172913	−2.120851