Table 3.
Baseline scores and change for four outcomes by treatment components: COPD-ED and CBT-I.
| Insomnia Severity Index | CRQ Fatigue | WASO | Sleep Efficiency | |||||
|---|---|---|---|---|---|---|---|---|
| Y | N | Y | N | Y | N | Y | N | |
| COPD-ED | ||||||||
| Baseline | 17.0 | 14.8 | 3.6 | 3.9 | 74.5 | 68.8 | 73.8 | 74.9 |
| Change at post-test | −4.8 | −3.3 | 0.5 | 0.4 | −7.2 | −2.4 | 1.9 | 2.7 |
| Change at follow-up | −5.1 | −4.9 | 0.6 | 0.6 | −6.2 | −0.8 | 3.3 | 1.3 |
| CBT-I | ||||||||
| Baseline | 16.0 | 15.8 | 3.8 | 3.7 | 76.8 | 66.5 | 72.7 | 76.0 |
| Change at post-test | −5.8 | −2.2 | 0.6 | 0.4 | −13.1 | 3.5 | 4.5 | 0.1 |
| Change at follow-up | −6.8 | −3.3 | 0.7 | 0.4 | −13.3 | 6.2 | 4.5 | 0.1 |
Sleep efficiency (actigraphy), n = 101. Bold = P < .05. Numbers are model-based least-square means adjusted for treatment components, time, and their interaction. Participants who received CBT-I are compared with those who did not receive it and participants who received COPD-ED are compared with those who did not receive it. We observed a baseline difference where those receiving COPD-ED had more severe insomnia (17) than those who did not (14.8), despite randomization. There were no other statistically significant differences between those who received COPD-ED and those who did not for all outcomes at baseline, and the change observed at post-test and follow-up. CBT-I = cognitive behavioral therapy for insomnia, COPD-ED = chronic obstructive pulmonary disease education, CRQ, Chronic Respiratory Disease Questionnaire, N = no, WASO = wake after sleep onset (actigraphy), Y = yes.