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  Basal Energy Expenditure - Schofield Equation  

Weight (kg)
Age (years)
  Female Patient
Metabolic stresses Pyrexia (+10%)
Long bone fracture (+10%)
Moderate infection (+10%)
Post-operative (+10%)
Chronic sepsis (+10%)
Inflammatory bowel disease (+10%)
Serious infection (+25%)
Activity Level Unconscious (no modification to BMR)
Awake but bed-bound & immobile (+10%)
Bed-bound & mobile or sitting (+17.5%)
Mobile on ward (+25%)
Ventilated and paralysed (-15%)
Metabolic feeding effect Patient is on IV nutrition (+10%)
Desired weight change None
Weight gain (+600 Kcal/day)
Weight loss (-600 Kcal/day)
   
Adjustment(s) made to calculation factors (% of BMR)
(Kcal/day) {for weight change}
Final calculated
Basal Energy
Expenditure
(Kcal/day)
  NB: See below for notes on the calculation

Calculation(s) used

Schofield equation for calculating Basal Metabolic Rate
(without modifications for stress/activity/illness)
Age (years) Male Female
15 - 18 (17.6 x weight) + 656 (13.3 x weight) + 690
19 - 30 (15.0 x weight) + 690 (14.8 x weight) + 485
31 - 60 (11.4 x weight) + 870 (8.1 x weight) + 842
> 60 (11.7 x weight) + 585 (9.0 x weight) + 656

NB: (weight in Kg) 

 

The Schofield equation 

Takes into account: -

  • Patients weight
  • Likely stresses imposed by their illness
  • Current activity levels
  • Stimulus to metabolism of giving food itself (thermic effect of feeding)
  • Unusual fluid or nutrient losses
  • Any need to make up nutrient deficits
References
1. Adapted from Prescribing Adult Intravenous Nutrition - Peter Austen and Mike Stroud (2007)
2. Kingston University and St. Georges M.Pharm course: PYM450 - Advanced topics in Clinical Pharmacy

Copyright 2006-2010 Jamie Alnasir, all rights reserved