Table 1.
Baseline Characteristics
| CBTI Mean (SD) | CTRL Mean (SD) | Total Mean (SD) | |
|---|---|---|---|
| Age (years) | 49.5 (13.6) | 47.8 (13.4) | 48.6 (13.3) |
| Female | 54% | 67% | 61% |
| Hispanic | 8% | 7% | 7% |
| Caucasian non-Hispanic | 77% | 67% | 71% |
| Age of depression onset (years) | 37 (16.6) | 33 (19) | 35 (18) |
| Duration of current MDE (months) | 20.4 (22.9) | 16.6 (15.7) | 18.3 (19) |
| Number of past depressive episodes | 2.3 (1.6) | 2.9 (2.5) | 2.6 (2.1) |
| Double depression (Dysthymia – MDD) | 46% | 47% | 46% |
| Age of insomnia onset (years) | 38 (15) | 35 (14) | 36 (14) |
| Duration of current insomnia episode (months) | 27.9 (20.7) | 32.6 (35.6) | 30.4 (28.7) |
| BMI (Kg/m2) | 26.3 (5.4) | 25.5 (4.8) | 25.9 (5.0) |
| PLM (events per hour) | 0.4 (1.3) | 0.2 (0.8) | .03 (1.0) |
| Arousal RDI (events per hour) | 2.5 (2.0) | 2.1 (2.2) | 2.3 (2.1) |
Arousal RDI – average number of respiratory events associated with arousal per hour of sleep.
All P-values were ≥ 0.4.