[Monitoring infant growth: comparative use of WHO standards and French national reference curves]

C Bois1, J Servolin, G Guillemot

  • 1Service départemental de protection maternelle et infantile (PMI), conseil général des Hauts-de-Seine, 2-16 boulevard Soufflot, Nanterre, Hauts-de-Seine, France. cbois1@cg92.fr

Insights

The World Health Organization (WHO) infant growth curves, unlike French Personal Child Health Record curves, provide a more accurate assessment for all infants. Using WHO curves optimizes infant care by preventing misinterpretations of weight gain.

Area of Science:

  • Pediatrics
  • Public Health
  • Growth Monitoring

Background:

  • The World Health Organization (WHO) growth curves (2006) are designed for exclusively breast-fed infants but are underutilized in France.
  • French Personal Child Health Record (PHCR) curves differ significantly from WHO curves, particularly in the 2-3 month range.
  • Discrepancies between growth curve interpretations can impact infant care and feeding recommendations.

Purpose of the Study:

  • To evaluate if the choice of growth curve (WHO vs. PHCR) influences the interpretation of infant growth and subsequent advice.
  • To assess the applicability of WHO curves for all infant feeding types in the French context.
  • To compare the concordance of interpretations between WHO and PHCR curves.

Main Methods:

  • Retrospective analysis of weight gain curves (WHO and PHCR) for 20 exclusively breast-fed infants by 22 physicians.
  • Prospective analysis of WHO curves for 151 infants (0-3 months) monitored in a consultation setting.
  • Statistical analysis using weighted kappa to measure inter-observer agreement for curve interpretations.

Main Results:

  • Significant discordance was observed between interpretations of French PHCR and WHO curves at 2 months (weighted kappa = -0.26).
  • Satisfactory concordance was found for interpretations within the WHO curves (weighted kappa = 0.71) and PHCR curves (weighted kappa = 0.58) independently.
  • French PHCR curves overestimated weight gain in one-third of infants, potentially leading to inappropriate feeding restrictions or overlooked concerns.

Conclusions:

  • The WHO growth curves offer a more reliable and consistent assessment of infant weight gain compared to French PHCR curves.
  • The WHO curves are applicable to a broader infant population, including non-breast-fed infants (excluding premature babies), for growth monitoring.
  • Wider adoption of WHO curves in France is recommended to enhance the accuracy of infant growth assessment and optimize clinical care.

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