4.6 Article

Linear Growth Trajectories, Catch-up Growth, and Its Predictors Among North Indian Small-for-Gestational Age Low Birthweight Infants: A Secondary Data Analysis

期刊

FRONTIERS IN NUTRITION
卷 9, 期 -, 页码 -

出版社

FRONTIERS MEDIA SA
DOI: 10.3389/fnut.2022.827589

关键词

catch-up growth (CUG); linear growth; small for gestational age (SGA); low birthweight (LBW) infant; growth faltering

资金

  1. Centre for Intervention Science in Maternal and Child Health (CISMAC), Department of Global Public Health and Primary Care, University of Bergen, Norway
  2. Research Council of Norway through its Centers of Excellence Scheme [223269]
  3. University of Bergen through funding to Centre for Intervention Science in Maternal and Child Health

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This study aims to describe the linear growth trajectories of low birthweight small-for-gestational-age (SGA-LBW) infants during the first 6 months of life compared with appropriate-for-gestational-age LBW (AGA-LBW) infants. The results showed that SGA-LBW infants had slower linear growth, lower attained length, and lower LAZ score compared to AGA-LBW infants. Factors associated with poor catch-up growth in SGA-LBW infants included lower wealth quintiles, high birth order, home birth, male child, term delivery, non-exclusive breastfeeding, and pneumonia.
Background: Low birthweight small-for-gestational-age (SGA-LBW) (birthweight below the 10th percentile for gestational age; SGA-LBW) infants are at an increased risk of poor postnatal growth outcomes. Linear growth trajectories of SGA-LBW infants are less studied in South Asian settings including India. Objectives: To describe the linear growth trajectories of the SGA-LBW infants compared with appropriate-for-gestational-age LBW (AGA-LBW) infants during the first 6 months of life. In addition, we estimated catch-up growth (delta LAZ > 0.67) in SGA-LBW infants and their performance against the WHO linear growth velocity cut-offs. Additionally, we studied factors associated with poor catch-up growth in SGA-LBW infants. Methods: The data utilized came from an individually randomized controlled trial that included low birthweight (LBW) infants weighing 1,500-2,250 g at birth. A total of 8,360 LBW infants were included. For comparison between SGA-LBW and AGA-LBW infants, we presented unadjusted and adjusted estimates for mean differences (MDs) or risk ratios (RRs) for the outcomes of length, linear growth velocity, length for age z-score (LAZ) score, and stunting. We estimated the proportion of catch-up growth. Generalized linear models of the Poisson family with log links were used to identify factors associated with poor catch-up growth in SGA-LBW infants. Results: Low birthweight small-for-gestational-age infants had a higher risk of stunting, lower attained length, and a lower LAZ score throughout the first 6 months of life compared with AGA-LBW infants, with differences being maximum at 28 days and minimum at 6 months of age. The linear growth velocity in SGA-LBW infants compared with AGA-LBW infants was significantly lower during the birth-28 day period [MD -0.19, 95% confidence interval (CI): -0.28 to -0.10] and higher during the 3- to 6-month period (MD 0.17, 95% CI: 0.06-0.28). Among the SGA-LBW infants, 55% showed catch-up growth for length at 6 months of age. Lower wealth quintiles, high birth order, home birth, male child, term delivery, non-exclusive breastfeeding, and pneumonia were associated with the higher risk of poor catch-up in linear growth among SGA-LBW infants. Conclusion: Small for gestational age (SGA) status at birth, independent of gestational age, is a determinant of poor postnatal linear growth. Promotion of institutional deliveries, exclusive breastfeeding, and prevention and early treatment of pneumonia may be helpful to improve linear growth in SGA-LBW infants during early infancy.

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