Validation of the Arabic Version of the Epworth Sleepiness Scale among the Yemeni Medical Students

Table 2

Principal component analysis of ESS.

No.	Item	Correlated item-total correlation	Component 1	Component 2
1	Sitting and reading	0.217	0.456
2	Watching TV	0.561	0.861
3	Sitting, inactive in a public place (e.g., a theatre or a meeting)	0.534	0.819
4	As passenger in a car for an hour without a break	0.421		0.591
5	Lying down to rest in the afternoon when circumstances permit	0.400		0.566
6	Sitting and talking to someone	0.239		0.462
7	Sitting quietly after lunch	0.502		0.698
8	In a car, while stopped for a few minutes in traffic variance explained	0.421		0.803
Cronbach’s alpha ()		0.65	0.65	0.62