Age-adjusted means (±standard errors) and prevalence of risk factors according to 3% ODI levels
| Men | Women | |||||||
| 3% ODI | p for trend | 3% ODI | p for trend | |||||
| 0–<5 | 5–<15 | ≥15 | 0–<5 | 5–<15 | ≥15 | |||
| No. | 879 | 428 | 115 | 2033 | 385 | 48 | ||
| Age (years) | 57.8 (0.3) | 58.4 (0.4) | 59.8 (0.7) | 0.006 | 56.0 (0.2) | 60.1 (0.4) | 60.8 (1.1) | <0.001 |
| BMI (kg/m2) | 23.2 (0.1) | 25.0 (0.1) | 26.6 (0.3) | <0.001 | 22.9 (0.1) | 25.0 (0.2) | 26.9 (0.4) | <0.001 |
| Current alcohol intake (g/day) | 22.4 (0.8) | 24.8 (1.1) | 28.3 (2.2) | 0.006 | 1.7 (0.2) | 2.0 (0.4) | 2.8 (1.0) | 0.22 |
| Current smokers (%) | 45 | 41 | 35 | 0.03 | 5 | 4 | 3 | 0.38 |
| Postmenopause (%) | – | – | – | 76 | 76 | 77 | 0.54 | |
| Hypertension (%) | 40 | 50 | 58 | <0.001 | 29 | 40 | 59 | <0.001 |
| Hypercholesterolaemia (%) | 16 | 23 | 26 | 0.001 | 33 | 34 | 27 | 0.57 |
| Diabetes mellitus (%) | 9 | 8 | 14 | 0.20 | 4 | 6 | 3 | 0.40 |
| Habitual snoring (%) | 19 | 34 | 56 | <0.001 | 7 | 19 | 34 | <0.001 |
| Apnoea (%) | 11 | 25 | 37 | <0.001 | 3 | 6 | 15 | <0.001 |
| Excessive daytime sleepiness (%) | 6 | 8 | 5 | 0.90 | 3 | 4 | 6 | 0.21 |
| Median 3% ODI (events/h) | 2.0 | 7.7 | 19.8 | – | 1.3 | 7.1 | 20.0 | |
| Median Spo2 (%) | 96 | 96 | 96 | – | 97 | 96 | 95 | |
| Median lowest Spo2 (%) | 88 | 84 | 78 | – | 90 | 84 | 78 | |
BMI, body mass index; ODI, oxygen desaturation index; Spo2, oxygen saturation.