Table 1.
Baseline characteristics of the study samples.
| Groups | Statistics | |||
| Variables | Intervention group (N = 70) | Waiting-list control group (N = 44) | ||
| M (SD) | M (SD) | t | P | |
|
| ||||
| Age | 55.3 (11.2) | 57.2 (12.4) | 0.87 | .39 |
| Duration of sleep problems (years) | 11.9 (11.1)a | 12.02 (9.6)b | 0.05 | .96 |
|
| ||||
| n (%) | n (%) | chi2 | P | |
|
| ||||
| Gender | 18 men (25.7%) | 10 men (22.7%) | 0.13 | .72 |
| 52 women (74.3%) | 34 women (77.3%) | |||
|
| ||||
| Sleep problems | ||||
| Solely problems with initiating sleep | 5 (7.1%) | 4 (9.1%) | 0.14 | .71 |
| Solely problems with maintaining sleep | 30 (42.9%) | 25 (56.8%) | 2.11 | .15 |
| Problems initiating and maintaining sleep | 35 (50.0%) | 15 (34.1%) | 2.78 | .10 |
| Consumption of hypnotics | 30 (42.9%) | 22 (50.0%) | 0.56 | .46 |
|
| ||||
| Comorbidities | ||||
| Somatic (e.g., cardiovascular disease) | 52 (74.3%) | 38 (86.4%) | 2.37 | .12 |
| Psychiatric (e.g., depression) | 14 (20.0%) | 6 (13.6%) | 0.76 | .38 |
| Medication for comorbidities | 49 (70.0%) | 33 (75.0%) | 0.34 | .56 |
a n = 45 respondents; b n = 33 respondents.