| CompSA | No CompSA | p-value | |
| Subjects n | 82 | 593 | |
| TST min | 341.4±87.9 | 344.2±81.6 | 0.733 |
| SE % | 69.5±15.6 | 70.5±15.5 | 0.558 |
| SL min | 36.1±44.9 | 29.3±33.7 | 0.204 |
| N1 % | 17.7±14.7 | 15.9±14.1 | 0.286 |
| N2 % | 50.4±14.8 | 51.7±13.4 | 0.429 |
| N3 % | 14.0±9.1 | 15.4±10.1 | 0.290 |
| REM % | 18.1±7.4 | 17.1±7.4 | 0.395 |
| WASO min | 118.8±67.4 | 117.1±71.0 | 0.657 |
| Arousal index events·h−1 | 51.4±24.4 | 46.9±25.3 | 0.061 |
| Awakenings n | 66.1±41.1 | 56.2±35.3 | 0.028* |
| Mean Sa,O2 % | 92.4±3.2 | 92.7±2.9 | 0.367 |
| AHI events·h−1 | 35.9 (22.0–54.5) | 26.2 (15.2–43.7) | 0.003* |
| AI events·h−1 | 19.7 (7.9–34.2) | 8.8 (2.9–22.6) | <0.001* |
| HI events·h−1 | 11.4 (7.0–18.3) | 12.2 (6.7–21.6) | 0.548 |
| OAI events·h−1 | 4.1 (0.8–10.8) | 4.1 (0.5–12.6) | 0.908 |
| MAI events·h−1 | 4.9 (0.6–17.1) | 1.0 (0.1–5.4) | <0.001* |
| CAI events·h−1 | 2.0 (0.3–4.7) | 0.2 (0.0–1.2) | <0.001* |
| Patients with periodic breathing % | 18.3 | 0.8 | <0.001* |
Data are presented as mean±sd or median (interquartile range), unless otherwise stated. TST: total sleep time; SE: sleep efficiency; SL: sleep latency; N1: sleep stage 1; N2: sleep stage 2; N3: sleep stage 3; REM: rapid eye movement; WASO: wake after sleep onset; Sa,O2: arterial oxygen saturation; AHI: apnoea/hypopnoea index; AI: apnoea index; HI: hypopnoea index; OAI: obstructive apnoea index; MAI: mixed apnoea index; CAI: central apnoea index. *: p<0.05, which was considered significant.