Table 2. Spearman’s correlation of quality of life with disease characteristics in patients with PD.

Characteristics		Duration	H&Y	UPDRS	GDS	PAS	PDQ-39
Abbreviations: GDS, geriatric depression scale; H&Y, Hoehn and Yahr staging scale; LED, levodopa equivalent dose; PAS, the Parkinson anxiety scale; PD, Parkinson’s disease; UPDRS, unified PD rating scale.
Duration	Pearson’s correlation	–	–	–	–	–	–
H&Y	Pearson’s correlation	0.331	–	–	–	–	–
UPDRS	Pearson’s correlation	0.457	0.595	–	–	–	–
GDS	Pearson’s correlation	0.315	0.299	0.695	–	–	–
PAS	Pearson’s correlation	0.419	0.459	0.772	0.733	–	–
PDQ-39	Pearson’s correlation	0.454	0.503	0.836	0.769	0.871	–
LED	Pearson’s correlation	0.448	0.468	0.630	0.510	0.582	0.644