title: Comparison of severity of illness indicators in an intensive care unit.
abstract: Meaningful comparison of patient outcomes requires an assessment of the severity of illness for the patients being compared. The more severe the underlying illness, the worse the expected outcome. We studied several severity of illness indicators derived from different methodologies in a medical intensive care unit. We compared the Acute Physiologic and Chronic Health Evaluation II, the accepted benchmark indicator for intensive care units, with one complex indicator, Computerized Severity Score, and three simpler indicators, Comorbidity, McCabe-Jackson, and American Society of Anesthesiologists. We found that all correlated well with a comorbidity index. We conclude that the Acute Physiologic and Chronic Health Evaluation II, the Computerized Severity Score, and the McCabe-Jackson scoring systems appear to be comparable predictors of comorbidity in a medical intensive care unit. Selection of a severity indicator will depend on the resources available and the intended uses.
authors.affiliation: Department of Internal Medicine, Hackensack Medical Center, NJ 07601.
authors.forename: P A
authors.initials: PA
authors.lastname: Gross
authors.forename: M R
authors.initials: MR
authors.lastname: Stein
authors.forename: C
authors.initials: C
authors.lastname: van Antwerpen
authors.forename: P J
authors.initials: PJ
authors.lastname: DeMauro
authors.forename: J R
authors.initials: JR
authors.lastname: Boscamp
authors.forename: W
authors.initials: W
authors.lastname: Hess
authors.forename: S
authors.initials: S
authors.lastname: Wallenstein
mesh_terms: D000368:Aged; D015897:Comorbidity; D003428:Cross Infection / Q000453:epidemiology; D005069:Evaluation Studies as Topic; D005260:Female; D006801:Humans; D007362:Intensive Care Units / Q000706:statistics & numerical data*; D007902:Length of Stay; D008297:Male; D008875:Middle Aged; D009515:New Jersey; D017063:Outcome Assessment, Health Care; D011446:Prospective Studies; D012720:Severity of Illness Index