When entering data it is important to verify that the data is valid or not. This is typically done by checking the value against expected limits.

Data: height for age


Reference: CDC 2000 height for age tables (merged 0 to 36 month with the 2 to 20 year tables)


Age metric: age in months


age in months =

= ((current date) - (birthdate)) / 30.4375



(1) absurdly high (more than 2 times the +4 SD value)

(2) more than 4 standard deviations above mean for age

(3) from -4 to +4 SD for age

(4) less than -4 SD from mean

(5) absurdly low (less than 0.5 times the -4 SD value)

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