Table 6.

PDCS subscales as determinants of quality of life (PDQ-39 Summary index).

	Coefficient	S.E.	95% CI	t	p	Beta
Motor	0.65	0.10	0.44-0.85	6.18	<0.001	0.25
Non-Motor	1.04	0.09	0.87-1.21	12.10	<0.001	0.38
Complications	0.36	0.13	0.10-0.62	2.73	0.007	0.08
Disability	2.35	0.45	1.46-3.23	5.21	<0.001	0.21

S.E.: standard error. 95% CI: 95% confidence interval

F (4, 661): 263.08; p < 0.0001; Adjusted R-squared: 0.61

Variance inflation factor: 1.50–2.89 (mean: 2.21)