| Before | After | P value |
Nocturnal oxygen saturations (Sp02) % | 94.4 | 95.0 | 0.412 |
Overnight nadir oxygen saturations (Sp02) % | 81.0 | 87.0 | 0.002 |
Nocturnal 3% oxygen desaturation index (ODI) | 5.45 | 2.4 | 0.003 |
Nocturnal carbon dioxide (pC02) kPa | 6.00 | 5.78 | 0.438 |
ACS (admissions per year) | 0.59 | 0.23 | 0.254 |
VOE (admission per year) | 0.45 | 0.50 | 0.922 |