Relationships among Depression, Anxiety, Sleep, and Quality of Life in Patients with Parkinson’s Disease in Taiwan

Table 5

Predictors of PDQ-39 in the forward multiple regression analysis .

Model	Unstandardized coefficients
	B	SE	p value
Constant	53.20	27.70
Sex
Males versus females	−3.28	3.16	0.301
Current age (years)	0.04	0.16	0.816
Disease duration (years)	−0.10	0.30	0.744
H&Y stage (1–4)	−2.26	2.79	0.421
LEDD (mg)	−0.002	0.004	0.643
MMSE	−1.97	0.827	0.019
UPDRS part I	0.53	0.66	0.432
UPDRS part II	1.47	0.38	<0.001
UPDRS part III	0.08	0.17	0.652
UPDRS part IV	0.66	0.56	0.246
BDI	0.70	0.21	0.001
BAI	0.95	0.18	<0.001
PDSS-2	−0.10	0.13	0.445
		0.70
	Adjusted	0.66

B: unstandardized regression coefficient; SE: standard error; H&Y: Hoehn and Yahr scale; UPDRS: Unified Parkinson’s Disease Rating Scale; BAI: Beck Anxiety Inventory; BDI: Beck Depression Inventory; PDSS-2: Parkinson’s Disease Sleep Scale-2; PDQ-39: 39-item Parkinson’s Disease Questionnaire; LEDD: levodopa equivalent daily dosage.