Characteristics of the patient populations
| Characteristics | Exploratory study (n=72) | Validation study (n=133) |
| Age (years), median (IQR) | 54 (46–61) | 52 (44–60) |
| Men, n (%) | 65 (90) | 118 (88) |
| BMI (kg/m2), median (IQR) | 34 (30–37) | 33 (30–37) |
| ESS, mean (IQR) | 13 (7–16) | 12 (7–16) |
| AHI (events/h), median (IQR) | 32 (20–54) | 25 (13–42) |
| ODI (events/h), median (IQR) | 35 (22–55) | 24 (13–44) |
| Years since first driving licence, median (IQR) | 34 (25–40) | 30 (30–38) |
AHI, apnoea hypopnoea index; BMI, body mass index; ESS, Epworth Sleepiness Score; ODI, oxygen desaturation index.