| Baseline | At 6 months | |
| Age (years) | 54.3 (11.0) | |
| M/F | 74/12 | |
| BMI (kg/m2)* | 35.6 (32.0–40.0) | 35.5 (31.9–39.9) |
| Neck size (cm) | 44.9 (4.0) | 44.5 (3.90) |
| ESS* | 16.0 (12.0–18.0) | 4.0 (2.0–7.0) |
| 24 hMBP (mm Hg) | 101.0 (10.3) | 96.1 (9.1) |
| Sao2 dips >4%/h of study* | 32.7 (18.3–49.8) | |
| Mean overnight % Sao2* | 92.6 (90.8–93.8) | |
| Minutes spent <90% Sao2* | 55.0 (18.3–120.0) | |
| No with known type 2 diabetes | 16/86 | |
| No on antihypertensive drugs | 47/86 | |
| CPAP compliance (h/night) | 4.8 (2.2) |
Data given as mean (SD) or *median (interquartile range) when not normally distributed.
BMI, body mass index; CPAP, continuous positive airway pressure; ESS, Epworth Sleepiness Score; 24 hMBP, mean 24 h blood pressure; Sao2, arterial oxygen saturation.