Step 1: Definition of Hypertension in Children.
Hypertension in children is defined as a sustained elevated blood pressure that is above the 95th percentile for age, sex, and height, measured on at least three different occasions. Blood pressure measurements are categorized as follows:
(1) Normal: Systolic BP<90th percentile
(2) Pre-hypertension: Systolic BP between 90th and 95th percentile
(3) Hypertension: Systolic BP \(\ge\) 95th percentile for age, sex, and height.