| No treatment | Acute CPAP OSA all |
OSA smokers | OSA nonsmokers | OSA all | |
Patients n | 10 | 8 | 18 | 18 |
Age yrs | 42.7±7.1 | 45.0±10.5 | 43.7±8.6 |
Body mass index kg·m−2 | 36.8±4.6 | 33.7±7.6 | 35.5±6.1 |
Office systolic BP mmHg | 135.0±8.7 | 127.5±11.3 | 131.5±10.4 |
Office diastolic BP mmHg | 87.7±5.7 | 80.0±7.1# | 84.1±7.3 |
Apnoea/hypopnoea index n·h−1 | 81±12 | 78±27 | 80±20 | 4±3 |
BP recording time min | 272±59 | 280±48 | 275±53 | 157±50¶ |
Nocturnal wakefulness % of BP recording time+ | 17.0±9.9 | 12.3±5.8 | 14.9±8.5 | 12.7±16.0 |
NREM stage 2 sleep % of BP recording time+ | 62.6±10.8 | 67.8±13.0 | 64.9±11.8 | 51.2±18.1¶ |
NREM stage 3–4 sleep % of BP recording time+ | 0.9±2.7 | 4.2±7.4 | 2.4±5.4 | 13.9±15.0¶ |
REM sleep % of BP recording time+ | 8.2±4.5 | 8.6±4.7 | 8.4±4.4 | 20.1±14.3¶ |
Sa,O2 during wakefulness % | 95.3±1.3 | 96.0±1.3 | 95.7±1.3 | 96.2±1.4 |
Mean lowest Sa,O2 NREM sleep % | 76.7±6.9 | 84.9±4.4# | 80.2±7.3 | 95.8±1.4¶ |
Mean lowest Sa,O2 REM sleep % | 60.6±11.2 | 71.5±12.9 | 64.9±13.0 | 95.3±1.6¶ |