From: Examining the impact of excessive daytime sleepiness on utility scores in patients with obstructive sleep apnoea and/or narcolepsy in five European countries
No EDS (ESS, 0–10)
Mild EDS (ESS, 11–12)
Moderate EDS (ESS, 13–15)
Severe EDS (ESS, 16–24)
(N = 1,557)
(N = 230)
(N = 265)
(N = 296)
EQ-5D utility scores, mean (SD)
0.711 (0.251)
0.685 (0.261)
0.643 (0.268)
0.559 (0.323)