Effect of Using the Food Quotient as a Proxy of the Respiratory Quotient in the Calculation of Energy Expenditure by the Doubly Labeled Water Method in Older Adults.

Key Points

• The aim is to evaluate the effectiveness of using food quotient as a proxy for respiratory quotient in energy expenditure calculations.
• Analyzed self-reported dietary intake data to estimate food quotient
• Compared energy expenditure calculations using food quotient and respiratory quotient
• Applied the doubly labeled water method for total energy expenditure calculations
• Using food quotient resulted in modest differences in energy expenditure estimates
• Overestimation of energy requirements was observed when fixed respiratory quotient values were used