Psychometric properties of the Epworth sleepiness scale in Ethiopian university students

Table 3 Internal consistency of the Epworth Sleepiness Scale (ESS) scores in Ethiopian university students

	Item-Total Correlation	Cronbach’s Alpha if Item Deleted	Communality
Sitting and Reading	.61^*	.72	.42
Watching TV	.59^*	.72	.39
Sitting inactive in a public place (i.e., a theatre)	.67^*	.72	.45
As a car passenger for an hour without a break	.64^*	.72	.40
Lying down to rest in the afternoon	.60^*	.74	.29
Sitting and talking to someone	.55^*	.72	.40
Sitting quietly after lunch without alcohol	.57^*	.74	.30
In a car, while stopping for a few minutes in traffic	.55^*	.73	.33