title: Waist circumference and weight change are associated with disability among elderly Hispanics.
abstract: BACKGROUND
  Studies have suggested that both high and low body mass index (BMI) and weight change are related to functional disability in elderly populations. Elderly Hispanics have a high prevalence of both obesity and disability, yet few studies have examined their interrelationship in this population. Therefore, we examined these relationships in a mostly Puerto Rican group of Hispanic elders.
  
  
  METHODS
  We investigated associations between a three-level disability score created from responses to a questionnaire on activities of daily living and BMI, waist circumference (WC), and weight change since age 50, using the proportional odds model in a cross-sectional study of 763 elderly Hispanics, aged 60 to 92 years, residing in Massachusetts.
  
  
  RESULTS
  After adjusting for potential confounders, men with a WC > or =109.3 cm (vs <90 cm), or with a reported weight loss of -0.32 to -0.01 kg/year, or a weight gain > or =0.55 kg/year since age 50 (vs relatively stable weight, -0.01 to +0.21 kg/year [y]) were each significantly associated with an approximately threefold higher risk for greater disability. Women with a BMI > or =35 kg/m(2) were almost four times as likely to have higher disability as those with a BMI of 20 to 25 kg/m(2). Compared with women with a WC < or =85.2 cm, those with a WC of 91.5 to 106.6 cm were two times more likely, and those with a WC > or =106.6 cm were five times more likely, to have higher disability scores. Compared with relatively stable weight (-0.05 to +0.23 kg/y), weight gain > or =0.23 kg/year was associated with a twofold higher risk of greater disability among women. When BMI and WC were included in the same model, WC, but not BMI, remained significantly associated with disability.
  
  
  CONCLUSIONS
  Abdominal obesity (WC > or =109.3 cm for men, or WC > or =91.5 cm for women) and weight gain > or =0.55 kg/year after age 50 in men or > or =0.23 kg/year in women may increase the risk of disability among elderly Hispanics.
authors.affiliation: The Jean Mayer USDA Human Nutrition Research Center on Aging, Tufts University, Boston, Massachusetts 02111, USA.
authors.forename: Honglei
authors.initials: H
authors.lastname: Chen
authors.forename: Odilia I
authors.initials: OI
authors.lastname: Bermúdez
authors.forename: Katherine L
authors.initials: KL
authors.lastname: Tucker
mesh_terms: D000368:Aged; D000369:Aged, 80 and over; D000375:Aging / Q000502:physiology*; D001824:Body Constitution; D001835:Body Weight; D003430:Cross-Sectional Studies; D006233:Persons with Disabilities; D005260:Female; D006630:Hispanic or Latino; D006801:Humans; D016013:Likelihood Functions; D008297:Male; D008875:Middle Aged