| Before treatment | After treatment | Statistical significance |
BMI kg·m−2 # | 31.2±5.6 | 31.2±5.6 | ns |
Total sleep time min | 386.4±57.2 | 387.4±52.1 | ns |
Sleep efficiency % | 87.4±10.1 | 89.5±9.5 | ns |
Stage wake % | 9.1±8.9 | 7.1±7.8 | ns |
Sleep stages 1+2 % | 66.0±13.6 | 64.9±11.1 | ns |
Sleep stages 3+4 % | 13.7±10.4 | 14.4±7.5 | ns |
Sleep stage REM % | 10.8±6.3 | 12.7±5.9 | <0.05 |
AHI n·h−1 | 28.0±19.5 | 5.2±8.2 | <0.001 |
Minimum nocturnal Sa,O2 % | 81.5±9.4 | 87.2±10.5 | <0.001 |
Mean nocturnal Sa,O2 % | 92.7±3.7 | 94.1±2.2 | <0.001 |