The World Health Organization (WHO) has published tables for the distribution of physical features in infants and young children up to the age of 5 years.

Patient selection: infant or child up to 5 years (from 0 to 1,856 days)



(1) birthdate

(2) date of the examination

(3) gender

(4) height in cm


age in days =

= (date of examination) - (date of birth)


The mean and standard deviation for each gender are known:


z-score =

= ((height in cm) - (mean)) / (standard deviation)


The z-scores range from -4 to +4.

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