Table 3. Begg’s test and Egger’s test results of subgroup analysis.

Subgroup	Sample	Begg’s test		Egger’s test
		z	p	z	p
EXT	17	1.32	0.1871	0.78	0.4347
AGR	14	-0.44	0.7418	-0.81	0.4161
CON	12	0.27	0.7834	0.78	0.4372
NEU	12	-0.96	0.4095	-0.91	0.3632
OPN	16	-0.54	0.6522	1.03	0.3020