Table 5. Examples of body composition methods.

Category

Equation

Reference method

Reference

Type I property-based methods

Fat = 0.65 x BW - 0.21 x Ht + 14.1

Anthropometry

 
 

FFM = 0.85 x Ht2/Z + 3.04

Bioimpedance analysis

 
 

SM = 18.9 x Cre + 4.1

24-h urinary creatinine excretion

(Lukaski et al., 1985)

     

(Wang et al., 1996)

Type II property-based methods

Fat = 4.95 x BV - 4.50 x BW

Hydrodensitometry

(Behnke et al., 1942)

 

FFM = 5.50 x BW - 4.95 x BV

Hydrodensitometry

 

Type I component-based methods

Protein = 0.335 x TBW - 2.53

Tracer dilution

(Beddoe and Hill, 1985)

Type II component-based methods

Protein = 6.25 x TBN

Prompt- IVNA gg

(Cunningham, 1994)

 

FFM = 1.37 x TBW

Tracer dilution

(Pace and Rathbun, 1945)

 

BCM = 213 x TBK

Whole-body 40K counting

(Modlesky et al., 1996)

 

Fat = 1.30 x TBC - 4.45 x TBN - 0.06 x TBCa

Prompt-gg IVNA and inelastic neutron scattering

(Kehayias et al., 1991)

Abbreviation: BW, body weight; Ht, height; FFM, fat-free body mass; Z, electrical impedance; SM, skeletal muscle; Cre, 24-h urinary creatinine excretion; BV, body volume; TBW, total body water; TB, total body; BCM, body cell mass; IVNA, in vivo neutron activation (Modified from Pace and Rathbun, 1945; Heymsfield et al., 1997).