OSA | OSA nCPAP | Controls | 3-way p-value | Controls versus OSA p-value | Controls versus nCPAP p-value | OSA versus nCPAP p-value | |
Subjects n | 36 | 15 | 17 | ||||
Age yrs | 52.8±12.0 | 53.4±10.8 | 46.4±10.7 | ns | 0.06 | 0.10 | ns |
Males % | 81 | 93 | 82 | ns | ns | ns | ns |
BMI kg·m−2 | 29.6±5.0 | 27.4±3.3 | 26.4±3.1 | 0.04 | 0.01 | ns | ns |
AHI events·h−1 | 31.7±14.4 | 11.3±4.9 | 9.7±3.8 | ns | |||
Time spent with Sa,O2 <90% % | 11.2±16.0 | 0.3±1.2 | 1.0±2.2 | 0.0001 | 0.001 | 0.10 | 0.0001 |
HTN % | 39 | 20 | 19 | ns | ns | ns | ns |
IHD % | 3 | 13 | 0 | ns | ns | ns | ns |
DM % | 22 | 0 | 6 | 0.07 | ns | ns | 0.09 |
Current smokers % | 25.0 | 20.0 | 29.4 | ns | 0.06 | ns | ns |
Never-smokers % | 38.9 | 53.3 | 64.7 | ns | 0.06 | ns | ns |
Data are presented as n, mean±sd and %, unless otherwise stated. BMI: body mass index; AHI: apnoea–hypopnoea index (total number of hypopnoeas plus hypopnoeas divided by hours of sleep); Sa,O2: arterial oxygen saturation; HTN: hypertension; IHD: ischaemic heart disease; DM: diabetes mellitus; ns: nonsignificant.