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WHO Growth Chart Training

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Using the WHO Growth Standard Charts

Transitioning from WHO to CDC Growth Charts at 2 Years of Age

When a child reaches age 24 months, health care providers need to switch from using the WHO growth standards charts to using the CDC growth reference charts for children ages 2 years up through 19 years. During the transition from one chart to another, children may experience a difference in classification because of a change from:

  • Recumbent length to standing height measurements. Note that the difference between recumbent length and stature in national survey data is approximately a 0.8 cm (¼ inch) difference. Standing height measures less than recumbent length. 
  • Breastfed reference population to a primarily formula-fed reference population.
  • Weight-for-length chart to BMI-for-age chart.
  • One set of cutoff values to another.
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