title: Body mass index and mortality in nonsmoking older adults: the Cardiovascular Health Study.
abstract: OBJECTIVE
  This study assesses the relationship of body mass index to 5-year mortality in a cohort of 4317 nonsmoking men and women aged 65 to 100 years.
  
  
  METHODS
  Logistic regression analyses were conducted to predict mortality as a function of baseline body mass index, adjusting for demographic, clinical, and laboratory covariates.
  
  
  RESULTS
  There was an inverse relationship between body mass index and mortality; death rates were higher for those who weighed the least. Inclusion of covariates had trivial effects on these results. People who had lost 10% or more of their body weight since age 50 had a relatively high death rate. When that group was excluded, there was no remaining relationship between body mass index and mortality.
  
  
  CONCLUSIONS
  The association between higher body mass index and mortality often found in middle-aged populations was not observed in this large cohort of older adults. Over-weight does not seem to be a risk factor for 5-year mortality in this age group. Rather, the risks associated with significant weight loss should be the primary concern.
authors.affiliation: Department of Biostatistics, University of Washington, Seattle 98195, USA.
authors.forename: P
authors.initials: P
authors.lastname: Diehr
authors.forename: D E
authors.initials: DE
authors.lastname: Bild
authors.forename: T B
authors.initials: TB
authors.lastname: Harris
authors.forename: A
authors.initials: A
authors.lastname: Duxbury
authors.forename: D
authors.initials: D
authors.lastname: Siscovick
authors.forename: M
authors.initials: M
authors.lastname: Rossi
mesh_terms: D017677:Age Distribution; D000368:Aged; D015992:Body Mass Index; D002318:Cardiovascular Diseases / Q000209:etiology; D002423:Cause of Death; D015331:Cohort Studies; D005260:Female; D006801:Humans; D016015:Logistic Models; D008297:Male; D009026:Mortality; D011237:Predictive Value of Tests; D012307:Risk Factors; D017678:Sex Distribution; D012907:Smoking / Q000453:epidemiology; D016019:Survival Analysis; D014481:United States / Q000453:epidemiology; D015431:Weight Loss