Related Experiment Video
Updated: May 23, 2026

Development of an Uncomplicated Mild Traumatic Brain Injury Model Modified by Weight-Drop Method and Evidenced by Magnetic Resonance Imaging
Published on: April 11, 2025
Weight gain after childhood traumatic brain injury: a matter of concern
Claire Jourdan1, Dominique Brugel, Katelyne Hubeaux
1AP-HP, Hôpital Raymond Poincaré, Physical Medicine and Rehabilitation Department, Garches, France. claire.jourdan@rpc.aphp.fr
Insights
Children experience rapid weight gain after traumatic brain injury (TBI). Male sex and mobility issues are linked to excessive weight gain in pediatric TBI patients.
Area of Science:
- Pediatric neurology
- Neurorehabilitation
- Child health
Background:
- Traumatic brain injury (TBI) can significantly impact a child's physical recovery.
- Weight changes and associated factors post-TBI require thorough investigation for optimal patient management.
Purpose of the Study:
- To evaluate weight changes in children during the first year following a traumatic brain injury.
- To identify factors influencing weight fluctuations and BMI z-score evolution after pediatric TBI.
Main Methods:
- A longitudinal observational study tracked 39 children with mixed-severity TBI over one year.
- Monthly weight and height measurements were used to calculate BMI and z-scores.
- Linear mixed-effect models analyzed factors affecting z-score changes.
Main Results:
- Children exhibited initial weight loss followed by rapid weight gain, with a mean BMI gain of 0.9 kg/m².
- Increased z-scores were associated with mobility restrictions, male sex, and older age.
- Six children became overweight, and males showed significantly higher weight gain.
Conclusions:
- Pediatric TBI is associated with rapid and potentially excessive weight gain in the first year.
- Male sex is identified as a risk factor for accelerated weight gain post-TBI.
Aim:
The aim of the study was to assess weight changes after traumatic brain injury (TBI) in children and the factors influencing them.
Method:
We conducted a longitudinal observational study of children with TBI of mixed severity who were consecutively admitted to one rehabilitation department (39 children; 23 males, 16 females; median age 8y 7mo; 25th to 75th centiles 3y 7mo-11y 6mo). Weight and height before TBI were obtained from the children's records and were measured monthly for 1 year after TBI. Body mass index (BMI) and BMI z-scores were calculated, and pre-TBI values were compared with the final values using paired tests. Linear mixed-effect interaction models were used to assess the effect of various factors on z-score evolution.
Results:
Z-score curves revealed early weight loss followed by a rapid increase in weight. The mean BMI gain over the period under study was 0.9 kg/m² (p < 0.001) and the mean z-score gain was 0.4 (p = 0.006). Six children had become overweight by the time of final assessment. Factors associated with a greater rate of increase in the post-TBI z-score were mobility restriction, male sex, and older age. Global pre- to post-TBI weight gain was significantly higher in males (z-score 0.7). Pituitary hormonal testing was available for 17 children at 3 months and for 27 at 1 year. Growth hormone deficiency was detected in one child.
Interpretation:
Weight gain of children during the first year after TBI was rapid and excessive. Male sex was a risk factor for excessive weight gain.
Related Concept Videos
Traumatic Brain Injury l: Introduction
Increased Intracranial Pressure l: Introduction
Increased Intracranial Pressure ll: Pathophysiology
Traumatic Memory
Post-traumatic Stress Disorder
Symptoms and Behavioral Manifestations
A spectrum of distressing symptoms characterizes PTSD. Recurrent flashbacks, where individuals involuntarily relive traumatic events, are a...

