Table 2.

Hierarchical Multiple Logistic Regression (n = 266)

Step 1-Covariates	b	SE	p	OR	95% CI (OR)
age	−.022	.014	.109	.979	.953,1.01
gender	−.338	.365	.354	.713	.348, 1.46
race (Black vs. White)	.172	.347	.621	1.187	.601, 2.34
race (Other vs. White)	−.641	1.106	.562	.527	.060, 4.60
site (site 3 vs. 1)	−.066	.438	.879	.936	.397, 2.21
site (site 2 vs. 1)	.530	.473	.262	1.699	.673, 4.29
NYHA functional class	.721	.210	.001	2.057	1.364, 3.10
Step 2-Predictors
age	−.019	.017	.248	.981	.949, 1.01
gender	−.350	.460	.447	.705	.287, 1.74
race (Black vs. White)	.154	.474	.746	1.166	.461, 2.95
race (Other vs. White)	−1.013	1.236	.412	.363	.0322, 4.09
site (site 3 vs. 1)	−.434	.538	.420	.648	.226, 1.86
site (site 2 vs. 1)	.383	.585	.513	1.467	.466, 4.62
NYHA functional class	.454	.236	.054	1.575	.992, 2.50
Total number of prescription drugs	−.033	.062	.589	.967	.857, 1.09
Number of Drugs Cause Daytime Somnolence	.733	.233	.002	2.082	1.33, 3.29
Treatment quality score	.402	.958	.674	1.496	.229, 9.77
Systolic blood pressure	−.019	.011	.089	.982	.961, 1.00
Waist circumference	−.002	.012	.863	.998	.976, 1.02
Sleep Disordered Breathing	.084	.413	.839	1.088	.484, 2.45
Exercise	−.186	.131	.155	.830	.642, 1.07
Alcohol consumption	−.297	.260	.253	.743	.447, 1.24
Smoking history	−.424	.298	.155	.654	.365, 1.17
Sleep hygiene	.334	.103	.001	1.397	1.14, 1.71
Depression (PHQ-2)	.602	.177	.001	1.827	1.29, 2.59
Perceived overall health	.495	.241	.040	1.641	1.02, 2.63
MSPSS total social support score	.006	.016	.710	1.006	.975, 1.04

Note: b =logit; parameter estimates derived from each step

OR = Odds Ratio

MSPSS = Multidimensional Scale of Perceived Social Support; PHQ-2 = Patient Health Questionnaire