Table 1.
Participant Characteristics at Baseline
| CBT (n = 60) |
CT (n = 65) |
BT (n = 63) |
Total (N = 188) |
Statistic | ||
|---|---|---|---|---|---|---|
| Gender (female) - % (n) | 53.3 (32) | 69.2 (45) | 63.5 (40) | 62.2 (117) | 3.42, p = .18 | |
| Age (yrs) – M (SD) | 46.9 (11.3) | 46.7 (12.8) | 48.5 (13.6) |
47.4 (12.6) |
0.40, p = .67 | |
| Ethnicity (non-caucasian) - % (n) | 8.5 (5) | 9.2 (6) | 3.2 (2) | 6.9 (13) | 3.61, p = .23 | |
| Marital Status - % (n) | 1.73, p = .78 | |||||
| Single | 33.3 (20) | 24.6 (16) | 27.0 (17) | 28.2 (53) | ||
| Married/Partnered | 51.7 (31) | 53.9 (35) | 55.6 (35) | 53.7 (101) | ||
| Divorced/Separated/Wid owed |
15.0 (9) | 21.5 (14) | 17.5 (11) | 18.1 (34) | ||
| Education (yrs) – M (SD) | 16.7 (3.0) | 15.9 (3.4) | 15.5 (3.3) | 16.0 (3.2) | 2.00, p = .14 | |
| Employment - % (n) | 7.42, p = .12 | |||||
| Full-part time/student | 82.8 (48) | 76.6 (49) | 67.7 (42) | 75.5 (139) | ||
| Unemployed | 12.1 (7) | 6.3 (4) | 12.9 (8) | 10.3 (19) | ||
| Retired | 5.2 (3) | 17.2 (11) | 19.4 (12) | 14.1 (26) | ||
| Insomnia duration (yrs) – M (SD) | 13.8 (11.9) | 14.8 (12.9) | 14.8 (13.6) |
14.5 (12.8) |
0.11, p = .90 | |
| Insomnia Severity Index– M (SD) | 17.9 (3.4) | 17.6 (3.5) | 18.3 (3.4) | 17.9 (3.4) | 0.70, p = .50 | |
| Type of insomnia - % (n) | 9.53, p = .30 | |||||
| Initial | 6.7 (4) | 4.6 (3) | 6.4 (4) | 5.9 (11) | ||
| Middle | 21.7 (13) | 29.2 (19) | 12.7 (8) | 21.3 (40) | ||
| Late | 3.3 (2) | 9.2 (6) | 6.4 (4) | 6.4 (12) | ||
| Mixed | 65.0 (39) | 56.9 (37) | 73.0 (46) | 64.9 (122) | ||
| Non-restorative | 3.3 (2) | 0.0 (0) | 1.6 (1) | 1.6 (3) | ||
| Number of apnea/hypopnea /hour (PSG) – M (SD) |
0.26 (0.86) | 0.15 (0.39) | 0.14 (0.38) |
0.18 (0.58) |
0.74, p = .48 | |
| Number of PLM associated with arousals (PSG) – M (SD) |
0.97 (2.64) | 0.74 (1.55) | 0.52 (1.58) |
0.74 (1.98) |
0.78, p = .46 | |
| Prior medication - % (n) | ||||||
| Antidepressant | 1.7 (1) | 6.2 (4) | 3.2 (2) | 3.7 (7) | 2.66, p = .26 | |
| Hypnotic | 35.0 (21) | 30.8 (20) | 39.7 (25) | 35.1 (66) | 1.17, p = .57 | |
| OTC | 20.0 (12) | 15.4 (10) | 20.6 (13) | 18.6 (35) | 0.69, p = .71 | |
| Comorbidity - % (n) | ||||||
| Medical (any) | 59.3 (35) | 52.3 (34) | 69.8 (44) | 60.4 (113) | 4.16, p = .13 | |
| Psychiatric (any) | 25.0 (15) | 23.1 (15) | 23.8 (15) | 23.9 (45) | 0.06, p = .97 | |
| Anxiety | 18.3 (11) | 21.5 (14) | 23.8 (15) | 21.3 (40) | 0.55, p = .76 | |
| Mood | 6.7 (4) | 6.2 (4) | 6.4 (4) | 6.4 (12) | 0.01, p = .99 | |