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Table 1 Predictive equations for estimation of EE

From: Energy expenditure in critically ill patients estimated by population-based equations, indirect calorimetry and CO2-based indirect calorimetry

Method Equation
a ACCP The ACCP equation [9, 10, 30] using BM as the only variable
EE(ACCP) = 25 kcal/kg/day · BM
b Harris–Benedict The Harris–Benedict equation from 1919 [11] multiplied by a SF
Men: EE(HB) = (66.5 + 13.75 kg−1 · BM + 5.003 cm−1 · height − 6.775 year−1 · age) kcal/day · SF
Women: EE(HB) = (655.1 + 9.563 kg−1 · BM + 1.85 cm−1 · height − 4.676 year−1 · age) kcal/day · SF
c Harris–Benedict IBM The Harris–Benedict equation with ideal body mass (IBM) multiplied by a SF
Men: EE(HBI) = (66.5 + 13.75 kg−1 · IBM + 5.003 cm−1 · height − 6.775 year−1 · age) kcal/day · SF
Women: EE(HBI) = (655.1 + 9.563 kg−1 · IBM + 1.85 cm−1 · height − 4.676 year−1 · age) kcal/day · SF
d Mifflin St Jeor The Mifflin St Jeor equation [12] multiplied by a SF
Men: EE(MSJ) = (9.99 kg−1 · BM + 6.25 cm−1 · height − 4.92 year−1 · age + 166) kcal/day · SF
Women: EE(MSJ) = (9.99 kg−1 · BM + 6.25 cm−1 · height − 4.92 year−1 · age − 161) kcal/day · SF
e Penn State 1 The original Penn State equation from 1998 [13]
EE(PS1) = 1.1 · HB + (32 min l−1 · MV + 140 °C−1 · T Max − 5340) kcal/day
f Penn State 2 Version 2 of the Penn State equation from 2003 [14]
EE(PS2) = 0.85 · HB + (33 min l−1 · MV + 175 °C−1 · T Max − 6433) kcal/day
g Penn State 3 Version 3 of the Penn State equation from 2003 [14]
EE(PS3) = 0.96 · MSJ + (31 min l−1 · MV + 167 °C−1 · T Max − 6212) kcal/day
  1. ACCP American College of Chest Physicians, T Max maximum body temperature in 24 h (°C)