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Table 4 Model predictions of ΔFFM

From: New fat free mass - fat mass model for use in physiological energy balance equations

  NHANES Forbes NHANES ΔFFM Forbes ΔFFM
  Baseline Final Baseline Final   
Anorexia [17] 1.5 ± 3.1 -- 2.5 ± 2.8 -- -- --
Athletes Males [18] 8.0 ± 4.5 -- 9.3 ± 5.3 -- -- --
Athletes Females [18] 6.1 ± 2.9 -- 3.7 ± 3.7 -- -- --
Bariatric Surgery [20, 21] -3.8 ± 3.2 -5.7 ± 3.2 1.4 ± 3.2 4.7 ± 3.3 -2.3 ± 3.0 -1.0 ± 3.2
CALERIE 6 Month Females [19] -1.6 ± 3.2 1.2 ± 3.0 -2.0 ± 2.7 0.9 ± 2.5 -0.4 ± 1.1 -0.3 ± 1.2
CALERIE 6 Month Males [19] 4.4 ± 3.2 5.7 ± 4.7 4.9 ± 3.1 6.1 ± 4.4 -0.5 ± 1.2 -0.4 ± 1.2
Gastric Bypass [22] 2.8 ± 3.9 -2.0 ± 7.2 -5.0 ± 4.5 -2.3 ± 5.2 -7.7 ± 4.7 -0.3 ± 5.5
Overfeeding Males [24, 25] -2.2 ± 6.1 -0.5 ± 5.4 -2.2 ± 6.6 -0.3 ± 5.5 0.1 ± 1.5 -0.1 ± 1.6
Overfeeding Females [24, 25] 0.2 ± 3.3 -2.0 ± 3.1 -0.6 ± 3.8 -2.7 ± 3.4 0.8 ± 1.1 0.7 ± 1.3
Minnesota [23] 2.9 ± 3.3 5.2 ± 3.0 0.6 ± 2.8 4.6 ± 2.2 2.2 ± 2.0 0.6 ± 2.1
  1. Mean error between measured and predicted FM at baseline and at the end of the weight change study along with the mean error in the ΔFFM. The NHANES model is comparable to the Forbes model except in the case of the gastric bypass subjects.