Table 2.

Subgroup analysis of the effects of different covariates on sleep quality in patients with PD.

Stratified subgroups	SMD (95% CI)	p	I2 (%)	p heterogeneity
Duration of intervention
<60 min	−0.559 (−0.775, −0.342)	<0.001	67.4	<0.001
≥60 min	−0.270 (−0.499, −0.040)	0.021	0.0	0.953
Frequency of intervention
<5 times/weeks	−0.468 (−0.758, −0.178)	<0.001	66.1	<0.001
≥5 times/weeks	−0.507 (−0.698, −0.301)	<0.001	42.5	0.042
Intervention period
<6 weeks	−0.416 (−0.590, −0.241)	<0.001	0.0	0.558
≥6 weeks	−0.518 (−0.758, −0.277)	<0.001	66.8	<0.001

CI, confidence interval.