Table 4.

Fit indices for models run

Model	Deviance	df	Deviance/df	AIC	BIC
(a) GLM—ESS continuous	142.33	2333	0.061	113.497	205.678
(b) GLM—US/RoW cutoffs: No EDS (ESS, 0–10), mild EDS (ESS, 11–12), moderate EDS (ESS, 13–15), severe EDS (ESS, 16–24)	141.91	2325	0.061	122.601	260.872
(c) GLM—UK cutoffs: No EDS (ESS, 0–10), mild EDS (ESS, 11–14), moderate EDS (ESS, 15–18), severe EDS (ESS, 19–24)	141.99	2331	0.061	111.912	215.615
(d) Piecewise linear: ESS score 0–11, ESS score 12–24	141.74	2331	0.061	107.752	211.456
(e) Linear spline with breakpoint at 11: ESS score 0–11, ESS score 12–24	141.74	2332	0.061	105.809	203.751

AIC Akaike information criterion, BIC Bayesian information criterion, df degrees of freedom, EDS Excessive daytime sleepiness, ESS Epworth Sleepiness Scale, GLM Generalized linear model, RoW Rest of world, UK United Kingdom, US United States