### Description

High blood pressure may be difficult to identify in a pediatric patient. The National High Blood Pressure Education Program Working Group developed equations to help to evaluate the blood pressure in this population.

Parameters:

(1) percentile of the patient for height by age

(2) systolic blood pressure in mm Hg

(3) diastolic blood pressure in mm Hg

(4) gender

Z score for height =

= NORMSINV(percentile of height for age)

mean systolic blood pressure for age in a male =

= (1.82416 * ((age) - 10)) + (0.12776 * (((age) - 10)^2)) + (0.00249 * (((age) - 10)^3)) - (0.00135 * (((age) - 10)^4)) + (2.73157 * (Z score for height)) - (0.19618 * ((Z score for height)^2)) - (0.04659 * ((Z score for height)^3)) + (0.00947 * ((Z score for height)^4)) + 102.19768

mean systolic blood pressure for age in a female =

= (1.94397 * ((age) - 10)) + (0.00598 * (((age) - 10)^2)) - (0.00789 * (((age) - 10)^3)) - (0.00059 * (((age) - 10)^4)) + (2.03526 * (Z score for height)) + (0.02534 * ((Z score for height)^2)) - (0.01884 * ((Z score for height)^3)) + (0.00121 * ((Z score for height)^4)) + 102.01027

mean diastolic blood pressure for age in a male =

= (0.68314 * ((age) - 10)) - (0.09835 * (((age) - 10)^2)) + (0.01711 * (((age) - 10)^3)) + (0.00045 * (((age) - 10)^4)) + (1.46993 * (Z score for height)) - (0.07849 * ((Z score for height)^2)) - (0.03144 * ((Z score for height)^3)) + (0.00967 * ((Z score for height)^4)) + 61.01217

mean diastolic blood pressure for age in a female =

= (1.01301 * ((age) - 10)) + (0.01157 * (((age) - 10)^2)) + (0.00424 * (((age) - 10)^3)) - (0.00137 * (((age) - 10)^4)) + (1.16641 * (Z score for height)) + (0.12795 * ((Z score for height)^2)) - (0.03869 * ((Z score for height)^3)) - (0.00079 * ((Z score for height)^4)) + 60.50510

 Standard Deviation male female systolic blood pressure 10.7128 10.4855 diastolic blood pressure 11.6032 10.9573

Z score for systolic blood pressure =

= ((measured systolic blood pressure) - (mean systolic blood pressure for age)) / (standard deviation for age)

Z score for diastolic blood pressure =

= ((measured diastolic blood pressure) - (mean diastolic blood pressure for age)) / (standard deviation for age)

percentile for systolic blood pressure for age =

= NORMSDIST(Z score for systolic blood pressure)

percentile for diastolic blood pressure for age =

= NORMSDIST(Z score for diastolic blood pressure)