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Reference equation for 6-min walk distance in healthy North African children 6-16 years old

Helmi Ben Saad1, Christian Prefaut, Rayfa Missaoui

  • 1Service de Physiologie et des Explorations Fonctionnelles, EPS Farhat Hached, Sousse, Tunisia.

Pediatric Pulmonology
|March 31, 2009
PubMed

Insights

A new reference equation for the 6-minute walk distance (6-MWD) was developed for healthy North African children aged 6-16. This equation accurately predicts 6-MWD, aiding pediatric patient care.

Area of Science:

  • Pediatric Pulmonology
  • Clinical Exercise Physiology
  • Anthropometry

Background:

  • Existing 6-minute walk distance (6-MWD) reference equations are not accurate for North African children.
  • A validated reference equation is needed for this specific pediatric population.

Purpose of the Study:

  • To develop and validate a new 6-minute walk distance (6-MWD) reference equation for healthy North African children aged 6-16 years.
  • To improve the accuracy of 6-MWD assessments in pediatric patients from this region.

Main Methods:

  • A prospective cross-sectional study was conducted with 200 healthy Tunisian children (100 girls) aged 6-16 years.
  • Anthropometric measurements (height, weight) and 6-minute walk distance (6-MWD) were recorded.
  • A validation cohort of 41 children was used to confirm the equation's reliability.

Main Results:

  • Published reference equations showed poor prediction of measured 6-MWD in North African children.
  • The 6-MWD was significantly correlated with age, height, and weight (P < 0.001).
  • The derived equation (6-MWD (m) = 4.63 x height (cm) - 3.53 x weight (kg) + 10.42 x age (years) + 56.32) explained 60% of 6-MWD variability, with satisfactory agreement in the validation group.

Conclusions:

  • A reliable 6-MWD reference equation for North African children aged 6-16 has been established.
  • This equation provides a valuable tool for clinical assessments and enriches existing pediatric reference data.
  • The findings support improved diagnostic accuracy and patient management in pediatric care within this demographic.
Abstract

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