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The financial burden of overweight and obesity among elderly Americans: the dynamics of weight, longevity, and health care cost.(Medicare and the Elderly)(Report)

Objective. To investigate the financial burdens attributed to overweight and obesity on the U.S. health care system among elderly Americans.

Data Source. Longitudinal Cost and Use files of the Medicare Current Beneficiary Survey from 1992 to 2001.

Study Design. We constructed a simultaneous equation system to model the dynamic relationship between changes in body weight, chronic diseases, functional status, longevity, and health care expenditures using maximum likelihood estimation. Based on the estimation, we conducted a simulation of one cohort with different baseline weights at age 65 and followed to death or up to age 100 of their health outcomes and lifetime health care ...

<18.5), 45 percent were in normal weight range (BMI between 18.5 and 25), 35 percent were overweight (BMI between 25 and 30), and 15 percent were obese (BMI>
<18.5)   0.05 
  Normal weight (BMI between 18.5 and 25) 0.45 
  Overweight (BMI between 25 and 30)  0.35 
  Obese (BMI>

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