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Area of Science:

  • Pediatric Nutrition
  • Global Health
  • Child Malnutrition

Background:

  • Children treated for wasting are often classified as 'non-responders' if they don't meet recovery criteria within 12-16 weeks, leading to their categorization as treatment failures.
  • This classification overlooks potential variations in growth trajectories among these children, potentially misidentifying those with delayed recovery as definitive treatment failures.

Purpose of the Study:

  • To conduct a pooled analysis of 14 studies involving children aged 6-59 months undergoing therapeutic feeding for wasting.
  • To explore the growth trajectories of 'non-responders' and critically evaluate the appropriateness of the current 'non-response' definition.
  • To differentiate between subgroups of non-responders based on their anthropometric gains during treatment.

Main Methods:

  • Pooled data from 14 studies including children classified as recovered or non-responders.
  • Defined 'low growth non-responders' (<25th percentile anthropometric gain) and 'high growth non-responders' (≥25th percentile gain) using pooled non-responder data.
  • Utilized mixed-effects generalized additive models to plot growth trajectories (MUAC, weight, height) for recovered, high growth, and low growth groups.
  • Employed multivariate multinomial logistic regression to identify predictors of non-response categories.

Main Results:

  • Non-responders are not a homogenous group; approximately 75% demonstrated significant growth ('high growth non-responders'), while 25% showed limited growth ('low growth non-responders').
  • High growth non-responders exhibited worse initial anthropometric status than recovered children but followed a similar growth trajectory, suggesting delayed recovery.
  • Low growth non-responders displayed minimal growth throughout treatment, indicating true treatment failure.

Conclusions:

  • The current definition of 'non-response' in wasting treatment is overly simplistic, failing to distinguish between delayed responders and true treatment failures.
  • High growth non-responders should be considered 'delayed responders' and may benefit from extended treatment duration.
  • Low growth non-responders represent genuine treatment failures requiring prompt referral for further investigation and management.