Digital Paediatric Growth Charts & Percentile Calculators

Update: Anyone keen to use the Digital Paediatric Growth Charts calculator that tracks growth over time can now contact us for a free trial. We will send you the joining instructions. An Activation link and User ID will be sent by Email (please check your spam folder if need be). Log on, Register a patient, click Care Record > Physical Exam tab and add your measures. Download our quick-start guide for the Digital Paediatric Growth Charts here (T&C apply, 30 day free use, extended at discretion on request for individual clinicians or payment of nominal fees as appropriate for group practices).

Why use growth charts in children?

As a part of working with children and young people in CAMHS or Children & Young People’s Services as well as within Paediatric Services, it is often necessary to monitor a child’s Pulse, Blood Pressure, Height, Weight, Body Mass Index etc. The Royal College of Psychiatrists MARSIPAN Guidelines recommends this. We use the same methodology as shown below.

Formula for calculating the %Median BMI of %Weight for Height in children and young people.

It is often not recognised that raw scores of the above parameters do not approximate those of Adults and need to be converted to percentile data which is more meaningful, especially under the age of 18. Below we have two children, pre-pubescent and second one in early adolescence, as seen below, simply going by the Body Mass Index as we do with Adults will lead to erroneous interpretations. If we go with BMI child 1 would be healthy at 28kg and child 2 would be healthy at 55kg. Yet at these weight’s their %weight for height (W4H) is 145% and 122% when ideal body weight range is 95% to 105%. A much lower weight of 18kg and 43kg equals healthy weight for these children. Also note that the App calculates 100% ideal body weight, not shown here the app also works out 95% and 105% estimates for current height, age, gender of the child to provide guidance on the healthy range.

How we do it?

In our Application we use LMS values to work out the height and weight centiles, we also calculate the BMI centiles and in addition provide % weight for height (i.e. % median BMI). The latter is far more valuable as the weight should be in line with the child’s current height (which is determined by parental heights rather than 50th centile lines shown on the charts).

While currently 2-3 applications online may provide the above information, none record longitudinal data, the Patient-Tracker does this over time. It would be thus useful for paediatricians, general practitioners dealing with medical causes affecting growth. The App would also benefit psychiatrists who work with ADHD and /or Eating Disorders.

The App in addition supports percentile calculations of head circumference (age 3 months to 5 years) as well as Blood Pressure (age 4-24 years).

Please browse through the media links below for more on this. We would be happy to work with your Electronic Health Records Provider to develop a secure API to make the care you provide more meaningful and safer. 

Weight | Height | BMI Percentiles with % Median BMI or Weight for Stature Calculations
Percentile Calculator – Blood Pressure in Children
Percentile Calculator for Children’s Head Circumference