7. Application of principles

7.1 Example 1: Child with trisomy 21

AB's family was interested in how her growth compared to the growth of other children with trisomy 21. The limitations of the condition-specific growth charts were explained:

Small sample sizes with limited diversity

Reflect growth of children with and without cardiac problems and feeding problems; not necessarily "ideal" growth

The condition-specific growth chart was used to make the following points:

		AB seems "short for her age" when compared to typically-developing children; when compared to other children with trisomy 21, she is not "short."
		At the age of 35 months, even among children with trisomy 21, AB's weight is at the 95th percentile for age.