Table 3. Simple and multiple regression analyses among BMI reduction rate and other clinical variables.

Independent variables	Simple regression		Multiple regressiona
	β	P	β	P
Age	0.123	NS	0.066	NS
Baseline BMI	−0.078	NS	−0.016	NS
Marital status	0.063	NS	NI	NI
Working status	−0.014	NS	NI	NI
Smoking status	0.236	0.025	0.216	0.033
CES-D	−0.200	0.059	−0.167	NS
STAI-state	−0.171	NS	NI	NI
STAI-trait	−0.134	NS	NI	NI
The number of walking steps per day during treatment	0.048	NI	NI	NI
Total calorie intake per day during treatment	−0.229	0.030	−0.261	0.01
The number of wake episodes per night at baseline	−0.350	0.001	−0.341	0.001

Abbreviations: BMI, body mass index; CES-D, Center for Epidemiologic Studies-Depression Scale; β, standard regression coefficients; NI, not insert; NS, not significant; STAI, State-Trait Anxiety Inventory.

^aAdjusted R²=0.273, F=5.187, P=0.002.