Lazzer et al reported equations for estimating the resting energy expenditure (REE) of obese Italian males. The authors are from the Italian Institute for Auxology, IRCCS, in Milan.
Patient selection: adult Italian male, 20 to 65 years of age, severely obese
Parameters:
(1) body weight in kilograms
(2) fat-free mass (FFM) in kilograms
(3) fat mass (FM) in kilograms
(4) height in meters
(5) age in years
fat mass =
= (body weight) - (FFM)
resting energy expenditure in megaJoules per day =
= (0.048 * (weight in kilograms)) + (4.655 * (height in meters)) - (0.020 * (age)) - 3.605
resting energy expenditure in megaJoules per day =
= (0.081 * (FFM in kilograms)) + (0.049 * (FM in kilograms)) - (0.019 * (age)) - 2.194
The second equation gives a lower than expected value. The comparable equation for obese females has the constant added, not subtracted. The rewritten equation would be
resting energy expenditure in megaJoules per day =
= (0.081 * (FFM in kilograms)) + (0.049 * (FM in kilograms)) - (0.019 * (age)) + 2.194
