Table 3.
Logistic Regression Model for <4hrs/night CPAP Use I-NAP‡ (n=97)
| Variable | B Coefficient | SE | Wald Chi-square [df=1] |
p value* | OR (95% CI) |
|---|---|---|---|---|---|
| Intercept | 3.80 | 2.13 | 3.20 | 0.07 | NA |
|
†SEMSA Outcome Expectancy |
−0.80 | 0.50 | 2.57 | 0.11 | 0.45 (0.17-1.20) |
| †SCT Self-efficacy | −0.59 | 0.37 | 2.52 | 0.11 | 0.55 (0.27-1.15) |
| †HLS1 | −0.59 | 0.33 | 3.17 | 0.08 | 0.55 (0.29-1.06) |
| BMI | 0.05 | 0.03 | 2.69 | 0.10 | 1.05 (1.00-1.12) |
| Marital Status (Married) |
−1.15 | 0.56 | 4.25 | 0.04 | 0.32 (0.11-0.95) |
| Sleepiness as presenting symptom |
−1.52 | 0.62 | 5.95 | 0.01 | 0.22 (0.07-0.74) |
| Restlessness in sleep as presenting symptom |
1.07 | 0.56 | 3.69 | 0.05 | 2.92 (0.98-8.69) |
| Gender (Female) | 0.74 | 0.55 | 1.78 | 0.18 | 2.09 (0.71-6.16) |
Likelihood Ratio Test X2[8]=34.67, p<0.0001
SEMSA - Self-efficacy Measure in Sleep Apnea; SCT - Social Cognitive Theory Questionnaire in Sleep Apnea; HLS - Health Literacy Screening Questionnaire; BMI – Body Mass Index; SCT – Social Cognitive Theory Questionnaire in Sleep Apnea; FOSQ – Functional Outcomes of Sleep Questionnaire; SE-Standard Error; OR=Odds Ratio.
p value to remain in the model defined at p<0.20
Variables that did not meet significance level included: HLS3 (p=0.80), HLS2 (p=0.49), ESS (p=0.67), FOSQ Productivity (p=0.22), FOSQ Activity (p=0.23), FOSQ Vigilance (p=0.41), FOSQ Social Outcome (p=0.75), FOSQ Intimacy & Sexual Activity (p=0.69); SEMSA Risk Perception (p=0.84), SEMSA Self-efficacy (p=0.79), SCT Outcome Expectancies (p=0.93), SCT Knowledge (p=0.40); SCT Social Support (p=0.23). Variables excluded from analysis due to collinearity included Total FOSQ score and Total HLS; Shift work excluded due to insufficient number of cases per adherence group.