Table 5.
Association between change of DBAS consequences subscale score and change of sleep and other outcomes
| DBAS-Consequences subscale score change by treatment interaction on outcome change | DBAS consequences subscale score (baseline to posttreatment) | Treatment (CBTI) | DBAS consequences subscale score change (baseline to posttreatment) × treatment | |
|---|---|---|---|---|
| PSQI change | Coefficient [95% CI] | −0.34 [−0.83, 0.15] | −1.61 [−2.83, −0.40] | 0.86, [0.29, 1.43] |
| p-value | .169 | .010 | .004 | |
| ISI change | Coefficient [95% CI] | −0.20 [−0.98, 0.58] | −3.04 [−4.97, −1.11] | 1.09 [0.18, 1.99] |
| p-value | .611 | .002 | .019 | |
| Sleep efficiency-D change | Coefficient [95% CI] | 0.42 [−1.83, 2.67] | 5.98 [0.47, 11.50] | −1.28 [−3.87, 1.31] |
| p-value | .715 | .034 | .329 | |
| WASO-D change | Coefficient [95% CI] | 1.19 [−6.63, 9.02] | −9.25 [−28.45, 9.95] | 1.71 [−7.30, 10.73] |
| p-value | .763 | .342 | .707 | |
| Sleep efficiency-A change | Coefficient [95% CI] | 0.45 [−0.35, 1.25] | −1.41 [−3.36, 0.55] | −0.19 [−1.13, 0.75] |
| p-value | .270 | .156 | .693 | |
| ESS change | Coefficient [95% CI] | −0.20 [−0.66, 0.26] | 0.18 [−0.96, 1.33] | 0.64 [0.10, 1.18] |
| p-value | .398 | .752 | .020 | |
| FFS change | Coefficient [95% CI] | −0.57 [−1.57, 0.43] | −0.87 [−3.36, 1.61] | 1.93 [0.76, 3.09] |
| p-value | .259 | .489 | .001 | |
| PHQ-9 change | Coefficient [95% CI] | 0.19 [−0.41, 0.79] | −0.26 [−1.76, 1.24] | 0.60 [−0.11, 1.30] |
| p-value | .536 | .734 | .095 | |
| SF-12vs physical health change | Coefficient [95% CI] | −0.63 [−1.97, 0.70] | 1.42 [−1.89, 4.72] | 0.09 [−1.46, 1.65] |
| p-value | .348 | .397 | .905 | |
| SF-12vs mental health change | Coefficient [95% CI] | −0.12 [−1.43, 1.19] | −2.00 [−5.25, 1.26] | −0.37 [−1.89, 1.16] |
| p-value | .855 | .227 | .636 |
DBAS, Dysfunctional Beliefs and Attitudes about Sleep; PSQI, Pittsburgh Sleep Quality Index; ISI, Insomnia Severity Index; sleep efficiency-D, sleep diary measured sleep efficiency; WASO-D, sleep diary measured wake after sleep onset; sleep efficiency-A, actigraphy measured sleep efficiency; ESS, Epworth Sleepiness Scale; FFS, Flinders Fatigue Scale; PHQ-9, Patient Health Questionnaire-9 items; SF-12, Medical Outcomes Study 12-item Short-Form health-related quality of life.