Patient selection: pediatric patients from 8 to 16 years
Parameters:
(1) gender
(2) age
(3) standing height in cm
(4) sitting height in cm
(5) body weight in kg
leg length in cm =
= (standing height) - (sitting height)
maturity offset for a male = years from PHV for a male =
= (0.0002708 * (leg length) * (sitting height)) - (0.001663 * (age) * (leg length)) + (0.007216 * (age) * (sitting height)) + (0.02292 * (weight) / (height)) - 9.236
maturity offset for a female = years from PHV for a female =
= (0.0001882 * (leg length) * (sitting height)) + (0.0022 * (age) * (leg length)) + (0.005841 * (age) * (sitting height)) - (0.002658 * (age) * (weight)) + (0.07693 * (weight) / (height)) - 9.376
Interpretation:
• A negative number indicates an age younger than PHV while a positive number indicates that the PHV has passed.
Performance:
• The R-squared for both equations was 0.89. The SEE was 0.59 for males and 0.57 for females.
• Performance is best for males 12 to 16 years of age and for females 9 to 13 years of age.
