Table 1.
Descriptive statistics (n=681).
| Mean (SD), n (%) | |
|---|---|
| Age, years | 62.1 (5.4) |
| Sex, female | 380 (55.8%) |
| Education: Low | 53 (7.8%) |
| Intermediate | 409 (60.1%) |
| High | 217 (31.9%) |
| Body mass index, kg/m2 | 27.2 (4.4) |
| Smoking: Never | 199 (29.2%) |
| Current | 113 (16.6%) |
| Previous | 368 (54.0%) |
| Alcohol use at night of PSG, units | 0.5 (1.0) |
| Depressive symptoms, score | 5.4 (6.7) |
| Systolic blood pressure, mmHg | 132.9 (17.9) |
| Total cholesterol, mmol/l | 5.6 (1.1) |
| Diabetes mellitus, yes | 41 (6.0%) |
| Myocardial infarction, yes | 11 (1.6%) |
| Sleep medication, yes | 55 (8.1%) |
| AHI | 13.5 (12.5) |
| Low AHI (<15) | 447 (65.6%) |
| Moderate AHI (15≤30) | 153 (22.5%) |
| High AHI (≥30) | 81 (11.9%) |
| Nocturnal oxygen desaturation, n/min | 0.3 (0.3) |
| Arousals, n/min | 0.05 (0.15) |
Abbreviations: AHI, apnea-hypopnea index; PSG, polysomnography; SD, standard deviation.