title: "Apnea index": need for improving the description of respiratory variability during sleep.
authors.forename: D W
authors.initials: DW
authors.lastname: Hudgel
mesh_terms: D000328:Adult; D003953:Diagnosis-Related Groups; D006801:Humans; D008875:Middle Aged; D012119:Respiration; D012720:Severity of Illness Index; D012890:Sleep / Q000502:physiology*; D012891:Sleep Apnea Syndromes / Q000503:physiopathology*