COMPARISON OF THREE METHODS OF TOTAL ENERGY EXPENDITURE

Abstract

1341 Alteration of total energy expenditure (TEE) is the cornerstone of weight management. Measurement of TEE using whole-room indirect calorimetry (WIC) or doubly labeled water (DLW) is difficult, time consuming, and expensive. Measurement of TEE by physical activity recall questionnaires (PARQ) is less time consuming and inexpensive but may not be precise and thus, may yield errors. To determine if differences in TEE exist between these 3 methods, we measured TEE by each method within a 1-month period. DLW and PARQ were measured simultaneously and measurement by WIC occurred within the following 2 weeks. Subjects (N=12) were moderately overweight (BMI=29.35±2.4kg·m−2), 21.50±4 years of age, were free from metabolic disease, were not medicated, and did not smoke. Results indicated TEE was 2878±522 kcal/d, 3077±863 kcal/d, and 2881±498 kcal/d for WIC, DLW, and PARQ, respectively. Analysis using ANOVA showed no significant differences between these methods. The intra-class correlation coefficient between the 3 methods was 0.97. Since PARQ compares favorably with the 2 reference methods of WIC and DLW, it may be a feasible, less time consuming and less expensive alternative to measure TEE. Supported by NIH DK49181 and NIH DK 49181-S1