Influences on catch-up growth using relative versus absolute metrics: evidence from the MAL-ED cohort study.

Journal Article (Journal Article)

Background

Poor growth in early childhood has been considered irreversible after 2-3 years of age and has been associated with morbidity and mortality over the short-term and with poor economic and cognitive outcomes over the long-term. The MAL-ED cohort study was performed in eight low-income settings with the goal of evaluating relationships between the child's environment and experience (dietary, illness, and pathogen exposure, among others) and their growth and development. The goal of this analysis is to determine whether there are differences in the factors associated with growth from 24 to 60 months using two different metrics.

Methods

Across six MAL-ED sites, 942 children had anthropometry data at 24 and 60 months, as well as information about socioeconomic status, maternal height, gut permeability (lactulose-mannitol z-score (LMZ)), dietary intake from 9 to 24 months, and micronutrient status. Anthropometric changes were in height- or weight-for-age z-score (HAZ, WAZ), their absolute difference from the growth standard median (HAD (cm), WAD (kg)), as well as recovery from stunting/underweight. Outcomes were modeled using multivariate regression.

Results

At 24 months, almost half of the cohort was stunted (45%) and 21% were underweight. Among those who were stunted at 24 months (n = 426), 185 (43%) were no longer stunted at 60 months. Most children increased their HAZ from 24 to 60 months (81%), whereas fewer (33%) had positive changes in their HAD. Linear regression models indicate that girls improved less than boys from 24 to 60 months (HAZ: -0.21 (95% CI -0.27, -0.15); HAD: -0.75 (-1.07, -0.43)). Greater intestinal permeability (higher LMZ) at 0-24 months was associated with lower relative and absolute changes from 24 to 60 months (HAZ: -0.10 (-0.16, -0.04); HAD: -0.47 (-0.73, -0.21)). Maternal height (per 10 cm) was positively associated with changes (HAZ: 0.09 (0.03, 0.15); HAD: 0.45 (0.15, 0.75)). Similar relationships were identified for changes in WAZ and WAD.

Conclusions

The study children demonstrated improved growth from 24 to 60 months of age, but only a subset had positive changes in HAD and WAD. The same environmental factors were associated with growth from 24 to 60 months regardless of metric used (change in HAZ or HAD, or WAZ and WAD).

Full Text

Duke Authors

Cited Authors

  • Richard, SA; McCormick, BJJ; Murray-Kolb, LE; Bessong, P; Shrestha, SK; Mduma, E; Ahmed, T; Kang, G; Lee, GO; Seidman, JC; Svensen, E; Kosek, MN; Caulfield, LE; MAL-ED Network Investigators,

Published Date

  • June 29, 2021

Published In

Volume / Issue

  • 21 / 1

Start / End Page

  • 1246 -

PubMed ID

  • 34187407

Pubmed Central ID

  • PMC8240385

Electronic International Standard Serial Number (EISSN)

  • 1471-2458

International Standard Serial Number (ISSN)

  • 1471-2458

Digital Object Identifier (DOI)

  • 10.1186/s12889-021-11120-0

Language

  • eng