Table 4.

GRADE quality of evidence assessment of included studies

Outcome Measures	Number of Studies	Sample Size	Limitations	Inconsistency	Indirectness	Imprecision	Publication Bias	Evidence Quality
MOCA Score	3	175	0	0	0	Downgraded by One Grade (b)	0	Moderate
HAMD Score	4	186	0	0	0	Downgraded by One Grade (b)	0	Moderate
TUGT Score	5	178	0	Downgraded by One Grade (a)	0	Downgraded by One Grade (b)	0	Low
FOG-Q Score	3	90	0	0	0	Downgraded by One Grade (b)	0	Moderate
UPDRS III Score	11	489	0	Downgraded by One Grade (a)	0	0	0	Moderate

Note: a: The confidence intervals of different studies have poor overlap, with a high I² value and a low P-value in the heterogeneity test; b: The sample size is too small, resulting in a wide confidence interval and poor overlap of confidence intervals; c: Publication bias is present