High BMI and frontal crashes

In adult patients injured in front impact motor vehicle collisions, the outcomes of obese patients with a Body Mass Index greater than 30 kg/m2 was compared with those less than 30 kg/m2. Obese patients were more likely to suffer a severe head injury from a frontal collision.

J Trauma. 2009 Mar;66(3):727-9
Traumatic Brain Injury After Frontal Crashes: Relationship With Body Mass Index