Table 2.

Analysis of SAQ subgroups.

SAQ	Heterogeneity		Effect value
	I 2 (%)	P	SMD [95% CI]	P
PL	69	0.07	0.50 [−0.14, 1.13]	0.13
AS	0	0.37	0.65 [0.29, 1.01]	0.0004∗
AF	55	0.14	0.64 [0.11, 1.18]	0.02∗
TS	72	0.06	0.95 [0.25, 1.65]	0.008∗
DP	73	0.06	0.20 [−0.48, 0.87]	0.57

^∗ P < 0.05, there was statistical significance.