| Unadjusted OR (95% CI) | p-value | Adjusted OR# (95% CI) | p-value | |
| AHI <5, ESS <10 (controls) | 1 | 1 | ||
| AHI <5, ESS ≥10 | 1.32 (0.40–4.31) | 0.65 | 1.33 (0.35–5.12) | 0.65 |
| AHI >5, ESS ≥10 | 2.18 (0.74–6.41) | 0.16 | 0.73 (0.19–2.70) | 0.63 |
| AHI >5, ESS <10 | 8.24 (3.56–19.1) | <0.001 | 3.66 (1.30–10.3) | 0.014 |
| AHI >15, ESS <10¶ | 11 (4.27–28) | <0.001 | 4.5 (0.43–48) | 0.209 |
| AHI >30, ESS <10¶ | 16 (4.6–56) | <0.001 | 3.06 (0.09–101) | 0.531 |
| Age yrs | 1.10 (1.07–1.14) | <0.001 | 1.08 (1.03–1.12) | 0.001 |
| BMI kg·m−2 | 1.32 (1.22–1.43) | <0.001 | 1.29 (1.18–1.42) | <0.001 |
| Alcohol dependence | 3.13 (1.21–8.07) | 0.018 | 7.16 (2.14–23.9) | 0.001 |
| Current smoking | 1.23 (0.60–2.52) | 0.58 | 2.01 (0.60–5.10) | 0.14 |
AHI: apnoea/hypopnoea index; ESS: Epworth Sleepiness Scale; BMI: body mass index. #: adjusted for all the factors in the table; ¶: analysed separately with AHI <5, ESS <10 as controls.