Total (n=204) | 71 (35) | 133 (65) |
Age years | 52.7±13.4 | 51.7±12.9 |
Male sex | 32 (45) | 52 (39) |
Body mass index kg·m−2 | 28.8±6.1 | 28.4±6.5 |
MME mg per day | 72 (22–135) | 68.8 (30–180) |
Neck circumference cm | 39 (36–42) | 38 (34–42.5) |
Active smoker | 9 (13) | 36 (27)* |
Cannabis user | 3 (4) | 12 (9) |
Medical conditions | | |
Asthma | 8 (11) | 12 (9) |
COPD | 3 (4) | 4 (3) |
Osteoarthritis | 25 (35) | 29 (22) |
Sleep parameters | | |
Apnoea–hypopnoea index events·h−1 | 8 (3.2–17.8) | 5.3 (1.5–19.4) |
Obstructive apnoea index events·h−1 | 5.6 (2.0–12.9) | 4.2 (1.3–14.2) |
Central apnoea index events·h−1 | 0.4 (0–1.7) | 0.4 (0–2.6) |
Mixed apnoea index events·h−1 | 0 (0–0) | 0 (0–0) |
Hypopnoea index events·h−1 | 5.7 (2.0–13.1) | 3.7 (1.1–9.8) |
Total arousal index | 15.9 (8.9–26.6) | 12.9 (8.4–23.1) |
Mean SpO2 % | 94.5 (92.9–96.2) | 94.2 (93–95.7) |
Nadir SpO2 % | 87 (84–91) | 87 (83–91) |
CT90 % | 0.2 (0–3.1) | 0.2 (0–4.8) |
Oxygen desaturation index (≥3%) | 11.2 (3.9–26.5) | 8.7 (2.1–26.2) |
Total sleep time min | 334 (276.5–372) | 335.5 (278.3–375.7) |
Sleep efficiency % | 79.8 (71.6–90.2) | 86.5 (76.0–91.7)# |
Sleep stage N1 % | 7.5 (4.0–12.1) | 6.0 (3.2–11.1) |
Sleep stage N2 % | 67.9 (59.5–75.2) | 66.0 (59.4–74.7) |
Sleep stage N3 % | 8.0 (2.6–15.9) | 9.7 (2.0–18.8) |
REM % | 12.6 (74–18.0) | 12.4 (5.5–19) |