Table 4 Inter-item Correlation matrix of the Epworth Sleepiness Scale (ESS) scores in Ethiopian university students
From: Psychometric properties of the Epworth sleepiness scale in Ethiopian university students
ESS item-1 | ESS item-2 | ESS item-3 | ESS item-4 | ESS item-5 | ESS item-6 | ESS item-7 | ESS item-8 | |
|---|---|---|---|---|---|---|---|---|
ESS item-1 | .40** | .31** | .32** | .27** | .28** | .24** | .26** | |
ESS item-2 | .32** | .23** | .25** | .34** | .28** | .23** | ||
ESS item-3 | .38** | .26** | .36** | .36** | .36** | |||
ESS item-4 | .36** | .26** | .26** | .32** | ||||
ESS item-5 | .14* | .25** | .12* | |||||
ESS item-6 | .29** | .35** | ||||||
ESS item-7 | .30** | |||||||
ESS item-8 |