Equations of Deurenberg et al for Estimating Fat Free Mass in Pediatric and Adult Patients Using Bioelectric Impedance

Patient selection: from 7 to 83 years of age

Parameters:

(1) gender (with male = 1, female = 0)

(2) age in years

(3) height in meters

(4) weight in kilograms

(5) resistance from bioelectric impedance in ohms

fat free mass in kilograms for a patient 7 to 15 years old =

= (0.406 * (10^4) * ((height)^2) / (resistance)) + (0.360 * (weight)) + (5.58 * (height)) + (0.56 * (points for gender)) - 6.48

fat free mass in kilograms for a patient >= 16 years old =

= (0.34 * (10^4) * ((height)^2) / (resistance)) + (0.273 * (weight)) + (15.34 * (height)) + (4.56 * (points for gender)) - (0.127 * (age)) - 12.44

where:

• Resistance in the study group was usually in the range of 450 to 600 ohms.