A reliable change index (RCI) for the Epworth sleepiness scale (ESS).
Smith
Simon
S
Sullivan
Karen A
KA
D001049:Apnea / Q000175:diagnosis*; D006970:Disorders of Excessive Somnolence / Q000175:diagnosis*; D006801:Humans; D011594:Psychometrics; D015203:Reproducibility of Results; D011795:Surveys and Questionnaires