PMC

Legends: Adjusted odds ratio (Point estimate and 95% CI) of atrial fibrillation (AF) (per 1 SD) for: a) common clinical cutoff points of AHI (apnea hypopnea index; No sleep disordered breathing: AHI <5; Mild: 5≤ AHI < 15; Moderate: 15 ≤ AHI < 30; Severe: AHI ≥ 30/hr) and for quartiles of b) ODI (Oxygen desaturation index), c) SWS (slow wave sleep) time and d) Arousal index. No sleep disordered breathing group and 1^st quartile are references. Point estimates for first through fourth quartiles are indicated by open circle (○), filled circle (●), open square (□) and filled square (■) respectively.