In-hospital mortality as a function of body mass index: an age-dependent variable

Research output: Contribution to journalArticle

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Abstract

In a retrospective review of 8428 hospital admissions, the relationship between age, sex, disease category, body mass index, and mortality during hospitalization was examined. Records were analyzed for adult admissions whose principal diagnosis fell into one of three categories: malignant disease, heart and cerebrovascular disease, and other diseases. In this study, age, disease category, and body mass index were predictors of survival; sex and race were not. Predicted mortality calculated by logistic regression was greatest at the extremes of body weight in all age groups and in each disease category describing a U-shaped relationship. Obesity was associated with higher mortality only when subjects were 100% or more overweight, whereas being at or below ideal weight was usually associated with increased mortality. Lowest mortality occurred at moderate overweight. The deleterious effects of extremes of body weight take on increasing importance the older the age of the patient. Underweight seems to be a more important predictor of mortality than overweight in older hospitalized subjects. The higher mortality in thin patients could not be explained by weight loss between hospitalizations.

Original languageEnglish (US)
Pages (from-to)M59-M63
JournalJournals of Gerontology
Volume43
Issue number3
DOIs
StatePublished - Jan 1 1988

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Hospital Mortality
Body Mass Index
Mortality
Hospitalization
Body Weight
Cerebrovascular Disorders
Thinness
Weight Loss
Heart Diseases
Age Groups
Obesity
Logistic Models
Weights and Measures
Survival

ASJC Scopus subject areas

  • Aging

Cite this

In-hospital mortality as a function of body mass index : an age-dependent variable. / Potter, Jane Frances; Schafer, Daniel Francis; Bohi, R. L.

In: Journals of Gerontology, Vol. 43, No. 3, 01.01.1988, p. M59-M63.

Research output: Contribution to journalArticle

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