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