Table 4.
Models of 4 outcomes regressed on treatment components, time, and their interaction.
| Insomnia Severity | Fatigue Level | WASO | SE | Dyspnea | ||||||
|---|---|---|---|---|---|---|---|---|---|---|
| β | P | β | P | β | P | β | P | β | P | |
| Intercept | 15.89 | <.0001 | 3.72 | <.0001 | 71.64 | <.0001 | 74.37 | <.0001 | 4.42 | <.0001 |
| COPD-ED | 1.11 | .01 | −0.14 | .17 | 2.88 | .38 | −0.53 | .61 | 0.02 | .87 |
| CBT-I | 0.13 | .75 | 0.05 | .65 | 5.18 | .12 | −1.65 | .11 | −0.26 | .07 |
| COPD-ED × CBT-I | −0.84 | .04 | 0.08 | .42 | 2.55 | .44 | −0.30 | .77 | −0.11 | .41 |
| Baseline | 0.00 | — | 0.00 | — | 0.00 | — | 0.00 | — | 0.00 | — |
| Post-test | −4.03 | <.0001 | 0.45 | <.0001 | −4.84 | .06 | 2.31 | <.0001 | 0.38 | <.0001 |
| Follow-up | −5.05 | <.0001 | 0.59 | <.0001 | −3.54 | .20 | 2.29 | <.0001 | 0.44 | .0004 |
| COPD-ED × baseline | 0.00 | — | 0.00 | — | 0.00 | — | 0.00 | — | 0.00 | — |
| COPD-ED × post-test | −0.74 | .12 | 0.03 | .72 | −2.41 | .34 | −0.44 | .54 | 0.09 | .31 |
| COPD-ED × follow-up | −0.10 | .83 | −0.03 | .73 | −2.69 | .32 | 0.97 | .17 | −0.11 | .34 |
| CBT-I × baseline | 0.00 | — | 0.00 | — | 0.00 | — | 0.00 | — | 0.00 | — |
| CBT-I × post-test | −1.80 | <.001 | 0.10 | .27 | −8.30 | <.001 | 2.23 | <.001 | 0.11 | .21 |
| CBT-I × follow-up | −1.77 | <.001 | 0.16 | .09 | −9.78 | <.001 | 2.21 | <.001 | 0.21 | .09 |
| COPD-ED × CBT-I × baseline | 0.00 | — | 0.00 | — | 0.00 | — | 0.00 | — | 0.00 | — |
| COPD-ED × CBT-I × post-test | 0.91 | .06 | −0.14 | .12 | −1.40 | .58 | −0.14 | .84 | −0.15 | .08 |
| COPD-ED × CBT-I × follow-up | 1.56 | <.001 | −0.21 | .02 | 3.80 | .16 | −1.84 | .01 | −0.13 | .26 |
Components (COPD-ED and CBT-I) were effect coded (−1, 1). Bold = P < .05. AC = attention control, CBT-I = cognitive behavioral therapy for insomnia, COPD-ED, chronic obstructive pulmonary disease education, SE = actigraphy sleep efficiency, WASO = actigraphy wake after sleep onset.