Table 1. Comparison of baseline data.

Variables	Heterogeneity		Model	Summary statistic	Effect value
	I2 (%)	P			Effect [95% CI]	Z	P
Gender	0	1.00	Fix	OR	1.12 [0.92, 1.36]	1.13	0.26
Age	0	0.47	Fix	MD	0.54 [−0.07, 1.15]	1.74	0.08
Duration	0	0.86	Fix	SMD	0.04 [−0.08, 0.16]	0.69	0.49

P<0.05, there was a statistical significance. Abbreviation: Fix, fixed-effects model.