Table 2. Pittsburgh Sleep Quality Index (PSQI) and Epworth Sleepiness Scale (ESS) subscale-total scale correlations according to country.

Pittsburgh Sleep Quality Index (PSQI)
	Chile	Ethiopia	Peru	Thailand
N	830	2230	2581	2840
Median (IQR)	6 (4,8)	6 (4,8)	6 (4,8)	5 (4, 7)
Sleep Duration	0.62	0.63	0.64	0.58
Sleep Disturbance	0.47	0.46	0.46	0.40
Sleep Latency	0.61	0.53	0.49	0.59
Sleep Efficiency	0.54	0.65	0.42	0.56
Daytime Dysfunction	0.55	0.52	0.57	0.51
Sleep Medication	0.37	0.32	0.28	0.34
Sleep Quality	0.71	0.54	0.63	0.63

*IQR-Interquartile range.