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J Am Geriatr Soc. 2007 Jun;55(6):913-7.

Association between body mass index and mortality in an 80-year-old population.

Author information

  • 1Division of General Internal Medicine, Department of Health Promotion, Kyushu Dental College, Kitakyushu, Japan. yutaka@kyu-dent.ac.jp

Abstract

OBJECTIVES:

To evaluate the association between body mass index (BMI) and all-cause mortality and cardiovascular disease (CVD) in an 80-year-old population.

DESIGN:

Cohort study.

SETTING:

Community-based.

PARTICIPANTS:

Six hundred ninety-seven of 1,282 (54.4%) 80-year-old candidate individuals.

MEASUREMENTS:

The dates and causes of all deaths were followed up for 4 years.

RESULTS:

The relative hazard ratios (HRs) for all-cause mortality were lower in overweight subjects (BMI > or= 25.0) than in underweight (BMI<18.5) or normal-weight (BMI 18.5-24.9) subjects. Similarly, the HRs for mortality due to CVD in overweight subjects were 78% less (HR=0.22, 95% confidence interval (CI)=0.06-0.77) than those in underweight subjects, and those in normal weight subjects were 78% less (HR=0.22, 95% CI=0.08-0.60) than those in underweight subjects. Mortality due to CVD was 4.6 times (HR 4.64, 95% CI=1.68-12.80) as high in underweight subjects as in normal-weight subjects, and mortality due to cancers was 88% lower (HR=0.12, 95% CI=0.02-0.78) in the overweight group than in the underweight group. There were no differences in mortality due to pneumonia.

CONCLUSION:

Overweight status was associated with longevity and underweight with short life, due to lower and higher mortality, respectively, from CVD and cancer.

[PubMed - indexed for MEDLINE]
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