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Table 3 Regression analysis of fat free mass, and fat free mass index by age in white, and black men and women. The Third National Health and Nutrition Examination Survey (NHANES III 1988–94).

From: Ethnic and age-related fat free mass loss in older Americans: The Third National Health and Nutrition Examination Survey (NHANES III)

   Men Women
  Characteristics Beta Coefficient Standard Error P Value Beta Coefficient Standard Error P Value
FFM (kg)        
  Ethnicity -0.338 0.276 0.227 -0.821 0.313 0.012
  Age (yrs) -0.109 0.011 <0.001 -0.125 0.021 <0.001
  BMI (kg/m2) 1.527 0.039 0.001 1.053 0.032 <0.001
FFMI (kg/m2)        
  Ethnicity -0.333 0.070 <0.001 -0.456 0.147 0.003
  Age (yrs) 0.017 0.003 <0.001 -0.015 0.005 0.004
  Body Weight (kg) 0.122 0.003 <0.001 0.479 0.006 <0.001
  1. Note: Statistical significance was set at P ≤ 0.05; Fat free mass model adjusted for body mass index; and fat free mass index model adjusted for body weight. FFM indicates fat free mass; FFMI indicates fat free mass index; and BMI indicates body mass index.