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Table 2 Change in HAZ, HAD and height from baseline (children around 8 months of age) to follow-up (around 58 months of age) and expected velocity in height in the Young Lives 4 country cohort study by catch-up growth (using the z-score criterion)

From: Using height-for-age differences (HAD) instead of height-for-age z-scores (HAZ) for the meaningful measurement of population-level catch-up in linear growth in children less than 5 years of age

    Ethiopia India Peru Vietnam
All children   n 520 240 393 332
   Change from baseline to follow-up     
    HAZ -0.40 -0.61 -0.66 -0.62
    HAD (cm) -4.1 -5.2 -6.1 -4.8
   Velocity in heighta     
    Observed (cm) 34.8 35.1 32.2 34.4
    Expected (cm) 38.9 40.3 38.3 39.1
By catch-up according to z-score criterion No n 324 167 308 267
  Change from baseline to follow-up     
   HAZ -1.27 -1.2 -1.01 -0.92
   HAD (cm) -6.3 -6.9 -7.3 -5.8
  Velocity in heighta     
   Observed (cm) 32.6 33.7 31.1 33.7
   Expected (cm) 38.9 40.6 38.3 39.4
Yes n 196 73 85 65
  Change from baseline to follow-up     
   HAZ 1.03 0.75 0.61 0.61
   HAD (cm) -0.5 -1.5 -1.7 -0.5
  Velocity in heighta     
   Observed (cm) 38.4 38.3 36.4 37.4
   Expected (cm) 38.9 39.8 38.1 37.9
  1. aThe observed velocity in height is the mean change in height between baseline and follow-up. The expected velocity is the expected change in height using the WHO 2006 growth standards