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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