Table 4. Multiple regression analyses of PSQI (a) in relation to subscales of DHI, age, sex, and all groups.

Predictive Variables	Regression Coefficient	Standard error	Standardized Regression Coefficient	p-value	VIF
Age	0.019	0.018	0.070	0.287	1.155
Sex	0.257	0.472	0.034	0.587	1.077
DHI-P	–0.018	0.057	–0.027	0.756	2.081
DHI-E	0.096	0.049	0.199	0.050	2.768
DHI-F	0.069	0.048	0.163	0.158	3.593
BPPV
MD	0.559	0.713	0.054	0.434	1.288
VN	–0.612	9.677	–0.062	0.367	1.283
VM	1.037	0.624	0.123	0.098	1.487
PD	1.820	0.842	0.143	0.032*	1.191
Other	2.262	0.830	0.182	0.007†	1.208

*p < 0.05.

^†p < 0.01.

R = 0.405, R² = 0.164, adjusted R² = 0.127. VIF, variance inflation factor.