Validity of self-reported energy intake in lean and obese young women, using two nutrient databases, compared with total energy expenditure assessed by doubly labeled water

Objective: To compare self-reported total energy intake (TEI) estimated usi ng two databases with total energy expenditure (TEE) measured by doubly lab eled water in physically active lean and sedentary obese young women, and t o compare reporting accuracy between the two subject groups. Design: A cross-sectional study in which dietary intakes of women trained i n diet-recording procedures were analyzed using the Minnesota Nutrition Dat a System (NDS; versions 2.4/6A/21, 2.6/6A/23 and 2.6/8.A/23) and Nutritioni st III (N3; version 7.0) software. Reporting accuracy was determined by com parison of average TEI assessed by an 8 day estimated diet record with aver age TEE for the same period, Results: Reported TEI differed from TEE for both groups irrespective of nut rient database (P < 0.01). Measured TEE was 11.10 +/- 2.54 and 11.96 +/- 1. 21 MJ for lean and obese subjects, respectively. Reported TEI, using either database, did not differ between groups. For lean women, TEI calculated by NDS was 7.66 +/- 1.73 MJ and by N3 was 8.44 +/- 1.59MJ. Corresponding TEI for obese women were 7.46 +/- 2.17 MJ from NDS and 7.34 +/- 2.27 MJ from N3 . Lean women under-reported by 23% (N3) and 30% (NDS), and obese women unde r-reported by 39% (N3) and 38% (NDS). Regardless of database, lean women re ported higher carbohydrate intakes, and obese women reported higher total f at and individual fatty acid intakes. Higher energy intakes from mono- and polyunsaturated fatty acids were estimated by NDS than by N3 in both groups of women (P less than or equal to 0.05). Conclusions: Both physically active lean and sedentary obese women under-re ported TEI regardless of database, although the magnitude of under-reportin g may be influenced by the database for the lean women, Sponsorship: USDA Hatch Project award (ARZT-136528-H-23-111) to LB Houtkoop er and WH Howell. Descriptors: energy intake; nutrient databases; doubly labeled water.