Table 2.
Sleep-related symptoms and polysomnographic findings.
| Control (n=72) | OSA (n=216) | p-value | |
|---|---|---|---|
| Snoring | 29 (40) | 107 (50) | 0.173 |
| Insomnia | 17 (24) | 70 (32) | 0.159 |
| Day-time sleepiness | 9 (13) | 45 (21) | 0.117 |
| Witnessed apnoea | 8 (11) | 64 (30) | 0.002 |
| Total sleep time (min) | 356 (316–404) | 360 (303–400) | 0.795 |
| AHI (events/h) | 1.95 (1.13–3.67) | 16.3 (8.9–26.7) | <0.001 |
| 3% ODI (events/h) | 2.85 (1.03–4.70) | 14.0 (8.18–22.5) | <0.001 |
| Mean SaO2 (%) | 96 (95–97) | 95 (94–96) | 0.006 |
| Lowest SaO2 (%) | 91 (89–93) | 86 (83–89) | <0.001 |
| Cumulative time of SaO2< 90% | 0 (0–0.4) | 2 (0.5–9) | <0.001 |
| Arousal index (events/h) | 4.60 (1.90–10.6) | 17.7 (11.2–26.1) | <0.001 |
Values are median (interquartile range) or n (%).
AHI, apnoea-hypopnoea index; ODI, oxygen desaturation index; SaO2, arterial oxyhaemoglobin saturation.