Frequencies of measurements for height used for plotting the reference curves for Dutch children with Down syndrome, arranged by age and sex.

1Height measurements of the children categorized as healthy or with only mild CHD (n = 664).2Head circumference of the children categorized as healthy or with only mild CHD, born at term (n = 223).1. 664名被归类为健康或仅患有轻度先天性心脏病（Congenital Heart Disease, CHD）的儿童的身高测量数据。 2. 223名足月出生、被归类为健康或仅患有轻度先天性心脏病的儿童的头围测量数据。