Baseline characteristics of the two study groups
| n | Intervention (n=32) | n | Control (n=33) | |
|---|---|---|---|---|
| Age | 32 | 41.5 (11.5) | 33 | 42.9 (11.7) |
| Body mass index (kg/m2) | 32 | 28.2 (2.9) | 33 | 27.7 (3.3) |
| Tonsil size | 32 | 2.5 (0.8) | 33 | 2.3 (0.9) |
| Friedman stage | 32 | 1.5 (0.5) | 33 | 1.6 (0.5) |
| Epworth Sleepiness Scale | 32 | 12.5 (3.2) | 33 | 12.9 (3.1) |
| Total sleep time (min) | 32 | 376.9 (46.7) | 33 | 376.9 (44.0) |
| Sleep efficiency (%) | 32 | 87.4 (6.7) | 33 | 87.2 (8.2) |
| Sleep latency (min) | 31 | 21.4 (13.7) | 33 | 20.5 (16.2) |
| N3 latency (min) | 30 | 76.7 (62.6) | 31 | 80.7 (69.9) |
| REM latency (min) | 32 | 169.3 (84.5) | 32 | 163.8 (89.5) |
| Time N1 (%) | 32 | 8.2 (6.8) | 33 | 8.8 (6.3) |
| Time N2 (%) | 32 | 56.2 (11.0) | 33 | 56.7 (11.0) |
| Time N3 (%) | 32 | 14.2 (11.4) | 33 | 14.1 (11.7) |
| Time REM (%) | 32 | 13.8 (5.7) | 33 | 12.5 (6.4) |
| Number of awakenings | 32 | 19.9 (13.2) | 33 | 20.6 (10.9) |
| Time in supine position (%) | 32 | 39.2 (22.4) | 33 | 40.1 (27.4) |
| Arousal index (events/h sleep) | 32 | 64.0 (16.2) | 33 | 60.3 (22.7) |
| Respiratory effort-related arousal index (events/h sleep) | 32 | 2.3 (3.1) | 33 | 1.9 (2.9) |
| Apnoea index (events/h sleep) | 32 | 40.8 (21.0) | 33 | 42.5 (23.7) |
| Apnoea/hypopnoea index (events/h sleep) | 32 | 53.3 (19.7) | 33 | 52.6 (21.7) |
| Mean length of apnoeas+hypopnoeas (s) | 32 | 24.1 (7.2) | 33 | 24.8 (7.7) |
| Respiratory disturbance index (events/h sleep) | 32 | 55.6 (18.6) | 33 | 54.7 (21.0) |
| Oxygen desaturation index (events/h sleep) | 32 | 44.6 (23.5) | 33 | 41.1 (22.2) |
| Nadir of oxygen saturation (%) | 32 | 79.9 (5.3) | 33 | 81.0 (6.6) |
Data are mean (SD).