Table 2 Main results: mean (95% confidence interval, CI).
| Baseline supine | LV1 | LV2 | p value for heterogeneity | |
|---|---|---|---|---|
| AHI (events/h) | 62.3 (42.3 to 82.3) | 37.2 (27.4 to 47.0) | 31.2 (18.1 to 44.3) | 0.009 |
| Arousal (events/h) | 63.8 (46.2 to 81.4) | 43.5 (31.2 to 55.8) | 38.2(27.2 to 49.2) | 0.039 |
| 3% desaturation (events/h) | 43.0 (23.2 to 62.8) | 16.1 (5.5 to 26.7) | 12.3 (1.9 to 22.7) | 0.002 |
| Mean O2 saturation (%) | 95.4 (94.8 to 96.0) | 96.0 (95.6 to 96.4) | 96.3 (95.7 to 96.9) | 0.001 |
| % awake | 17.4 (10.1 to 24.7) | 10.1 (6.0 to 14.2) | 8.6 (4.1 to 13.1) | 0.071 |
| % stage 1 | 27.8 (20.9‐34.7) | 13.5 (9.6‐17.4) | 14.1 (5.7 to 22.5) | 0.001 |
| % stage 2 | 54.8 (41.1 to 68.5) | 66.5 (54.0 to 79.0) | 77.2 (67.0 to 87.4) | 0.009 |
| Beta power | 11.5 (8.4 to 14.6) | 8.6 (6.6 to 10.6) | 7.9 (5.7 to 10.1) | 0.001 |
| Alpha power | 8.5 (4.4 to 12.6) | 7.1 (4.9 to 9.3) | 7.2 (4.8 to 9.6) | NS |
| Theta power | 10.9 (7.8 to 14.0) | 14.9 (10.6 to 19.2) | 14.7 (12.2 to 17.2) | 0.004 |
| Delta power | 46.4 (33.7 to 59.1) | 55.7 (35.5 to 75.9) | 48.8 (35.1 to 62.5) | NS |
AHI, apnoea hypopea index.
Beta, alpha, theta and delta power are defined in the text.