Weight/length ratio references and newborn body composition estimation at birth from a Brazilian cohort

Autor(es)

Grandi, Carlos ^[1] ; Rodrigues, Livia Dos S. ^[2] ; Aragon, Davi C. ^[2] ; Carmona, Fabio ^[2] ; Cardoso, Viviane C. ^[2]

Afiliação do(s) autor(es)

^[1] Argentine Soc Pediat, Res Dept, Buenos Aires, DF - Argentina

^[2] Univ Sao Paulo, Fac Med Ribeirao Preto, Dept Puericultura & Pediat, Ribeirao Preto, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: Jornal de Pediatria; v. 97, n. 6, p. 610-616, 2021.
• Citações Web of Science: 1

Resumo

Objectives: The objective was to calculate weight/length (W/L) ratio values and percentiles by sex and gestational age (GA) to estimate fat mass (FM), fat-free mass (FFM) and body fat percentage (BF%) as welt as to compare these indices in preterm, small (SGA), and large (LGA) for GA, stunted and wasted infants from a Brazilian cohort of newborns, comparing with the INTERGROWTH-21st. Methods: Secondary, cross-sectional analysis of data obtained of 7427 live-born infants from the BRISA Cohort Study in the city of Ribeirao Preto, SP, Brazil in 2010. For body composition estimation, W/L ratio was used in multiple regression models. The 3rd, 50th, and 97th percentiles for W/L ratio and body composition measures (FM, FFM, and BF%) were calculated using fractional polynomial regression models. Results: Average W/L ratio was 6.50 kg/m (SD 0.87), while for FM, BF%, and FFM the corresponding values were 359.64 g (145.76), 10.90% (3.05) and 2798.84 g (414.84), respectively. SGA (< 3rd percentile), and wasted infants showed the lowest W/L ratios and measures of body composition. The 3rd, 50th, and 97th percentiles charts of W/L, FM, BF%, and FFM by GA and sex are presented. Conclusions: W/L ratio values of the RP-BRISA Cohort are higher than IG-21st. SGA (< 3rd) and wasted infants showed the lowest W/L ratio and measures of body composition. The body composition references presented here could be used to refine the nutritional assessment of Brazilian newborns and to facilitate comparisons across populations. (C) 2021 Sociedade Brasileira de Pediatria. Published by Elsevier Editora Ltda. (AU)

• Processo FAPESP: 08/53593-0 - Fatores etiológicos da prematuridade e conseqüências dos fatores perinatais na saúde da criança: coortes de nascimentos em duas cidades brasileiras
• Beneficiário: Marco Antonio Barbieri
• Modalidade de apoio: Auxílio à Pesquisa - Temático