Author
 |
Butte, Nancy |
|
HOPKINSON, JUDY - BAYLOR COLL OF MEDICINE |
|
HEINZ, CAROLYN - BAYLOR COLL OF MEDICINE |
|
MEHTA, NITESH - BAYLOR COLL OF MEDICINE |
|
Wong, William |
|
SHYPAILO, ROMAN - BAYLOR COLL OF MEDICINE |
|
Ellis, Kenneth |
|
Submitted to: Pediatric Research
Publication Type: Abstract Only Publication Acceptance Date: 2/19/1999 Publication Date: N/A Citation: N/A Interpretive Summary:
Technical Abstract: Current recommendations for energy intake of infants and children are based on observed energy intakes due to a lack of data on energy expenditure, the preferred basis for estimating energy requirements. The purpose of this study was to estimate energy requirements during the first two years of life from measurements of total energy expenditure (TEE) and energy deposited as fat and protein. Methods: Measurements were performed on 76 healthy, term infants (40 breast-fed (BF) and 36 formula-fed (FF)) at 3, 6, 9, 12, 18, and 24 mo of age. TEE was measured by the doubly-labeled water (2H218O) method. Energy deposition was estimated from changes in body fat and protein. Fat was measured using a multicomponent model based on total body water by deuterium dilution; total body potassium (TBK) by whole body counting; and bone mineral content by dual energy x-ray absorptiometry. Protein was estimated from TBK. Energy equivalents for fat and protein deposition were taken as 38.7 kJ/g and 23.6 kJ/g, respectively. Data were analyzed by repeated measures ANOVA. Results: At 3, 6, 9, 12, 18, and 24 mo of age, mean TEE (kJ/kg/d) was 286 +/- 55, 312 +/- 58, 338 +/- 61, 335 +/- 55, 330 +/- 57, 336 +/- 46. Rates of energy deposition were 85 +/- 24, 19 +/- 14, 10 +/- 13, 10 +/- 7, 6 +/- 5, 6 +/- 9, respectively. Energy requirements were 370 +/- 57, 328 +/- 58, 348 +/- 62, 344 +/- 55, 328 +/- 60, 340 +/- 48, respectively. Energy deposition differed by age (P=0.001). Adjusted for weight, TEE and energy requirements differed by feeding group (BF |
