Results of this study suggested that an RA diagnosis and treatment are associated with urbanization.

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Objective: Very-low-birth-weight (VLBW) preterm infants are at risk of growth delay if they do not receive adequate nutritional support. This study evaluated the effect of aggressive early high-dose amino acid infusion plus early enteral trophic feeding on growth in VLBW infants within the first day of life. Study Design: The effect of a high-dose 3 g amino acid (HAA)/kg/d regimen beginning on the first day of life was compared with that of low-dose amino acid (LAA) supplementation at a dose of 0.5 or 1.0 g/kg/d. The primary outcome measures were the days of regained birth weight and achieved full enteral feeding. Result: Compared with the 19 infants in the LAA group, the 17 infants in the HAA group achieved significantly earlier full enteral feeding (7.8 ± 3.6 vs. 15.2 ± 8.9, p = 0.003) and regained birth weight (13.3 ± 3.8 vs. 17.5 ± 7.9, p = 0.047). In addition, shorter parenteral nutrition time was achieved by HAA administration (p < 0.05). Total energy intake was greater during the first 7 days of life in the HAA group (85 ± 12 kcal/kg/d on day 7) than in the LAA group (60 ± 16 kcal/kg/d on day 7, p < 0.001). Other clinical parameters such as length of hospital stay and morbidity favored the use of HAA. Conclusion: Aggressive early simultaneous amino acid administration plus enteral feeding during the first few days of life for preterm infants was associated with improved weight gain and earlier full enteral feeding.

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