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Table 2 Distributions of fat free mass, fat free mass index and body weight in white and black men, and in 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)

  Age Groups (yrs) Sample Size Whites Mean ± SE African Americans Mean ± SE P Value
FFMI (kg/m 2)      
Men 40–49 708 20.64 ± 0.12 20.91 ± 0.14 0.153
  50–59 573 21.13 ± 0.11 20.92 ± 0.15 0.265
  60–69 718 21.00 ± 0.12 20.92 ± 0.17 0.704
  70–79 600 20.68 ± 0.14 20.33 ± 0.15 0.059
  > 80 455 19.93 ± 0.12 19.89 ± 0.32 0.904
Women 40–49 607 17.49 ± 0.10 18.70 ± 0.20 <0.001
  50–59 506 18.07 ± 0.17 18.71 ± 0.22 0.026
  60–69 581 18.09 ± 0.12 19.26 ± 0.29 <0.001
  70–79 605 18.21 ± 0.11 18.93 ± 0.25 0.014
  > 80 450 18.09 ± 0.09 18.34 ± 0.32 0.432
FFM (kg)      
Men 40–49 708 64.83 ± 0.52 65.30 ± 0.61 0.550
  50–59 573 65.94 ± 0.38 64.29 ± 0.59 0.012
  60–69 718 64.42 ± 0.42 63.23 ± 0.66 0.139
  70–79 600 61.50 ± 0.43 60.36 ± 0.65 0.124
  > 80 455 57.74 ± 0.46 57.23 ± 1.32 0.715
Women 40–49 607 46.90 ± 0.35 50.28 ± 0.66 <0.001
  50–59 506 47.66 ± 0.46 49.59 ± 0.69 0.013
  60–69 581 46.94 ± 0.40 50.15 ± 0.69 0.001
  70–79 605 45.59 ± 0.39 48.01 ± 0.62 0.002
  > 80 450 43.83 ± 0.27 45.04 ± 0.83 0.143
Body Weight (kg)      
Men 40–49 708 83.76 ± 1.00 82.10 ± 1.00 0.252
  50–59 573 85.35 ± 0.66 81.13 ± 1.03 <0.001
  60–69 718 83.94 ± 0.73 80.41 ± 1.13 0.013
  70–79 600 78.92 ± 0.70 76.91 ± 1.09 0.097
  > 80 455 73.25 ± 0.63 72.77 ± 2.07 0.834
Women 40–49 607 65.71 ± 0.66 71.71 ± 1.41 <0.001
  50–59 506 68.47 ± 0.93 71.83 ± 1.38 0.031
  60–69 581 66.86 ± 0.68 72.33 ± 1.09 <0.001
  70–79 605 64.11 ± 0.74 68.44 ± 1.07 0.002
  > 80 450 60.46 ± 0.45 61.93 ± 1.62 0.365
  1. Note: statistical significance was set at P ≤ 0.05; Whites and African Americans refer to respective ethnic groups of non-Hispanic origin. FFM indicates fat free mass; FFMI indicates fat free mass index; and BMI indicates body mass index.