The Mifflin-St Jeor equation is a widely used tool to determine the basal metabolic rate [BMR], which is defined as the number of calories burned while the body is performaing its basic functions to work. The equation was developed by MD Mifflin and ST St Jeor and first introduced in a paper published in 1990.
he Mifflin-St Jeor equation is the most reliable, predicting BMR within 10% of measured in more nonobese and obese individuals than any other equation, and it also has the narrowest error range.
Both the Harris-Benedict formula and Mifflin – St Jeor formula are commonly used and referenced today. It has been suggested that the difference between the Harris-Benedict and Mifflin-St Jeor equations is around 5%, with a higher accuracy level achieved by the Mifflin – St Jeor formula.
The WHO Formula has been designed to calculate the BMR to predict human energy requirements.
However, a survey of the most recent studies (1980–2000) in BMR suggests that in most cases the current FAO/WHO/UNU predictive equations overestimate BMR in many communities.