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

Figure 2

The revised factorial structure of the 7-item ESS. e2-e8: car-S-R represent error variances; single-headed arrows from factors depict factor loading to items; car: in a car while stopped a few minutes; passenger: as a passenger in a car for an hour without a break; quietly: sitting quietly after a lunch; lying; lying down to rest in afternoon; TV: watching TV; P-P: public places; S-R: sitting and reading.