Patient demographics
| Non-obese (BMI <30) | Obese (BMI ≥30) | P value | |
| N | 6953 | 2528 | – |
| Male gender | 4756 (68%) | 1632 (64%) | <0.001 |
| Age | 50±22 | 48±18 | 0.40 |
| Body mass index | 24.7±3.1 | 35.1±5.2 | <0.001 |
| Injury severity score | 11±9 | 10±9 | 0.001 |
| Mechanism of Injury | |||
| Assault | 690 (10%) | 164 (6%) | <0.001 |
| Fall | 2517 (36%) | 811 (32%) | <0.001 |
| Motorcycle collision | 238 (3%) | 100 (4%) | 0.22 |
| Motor vehicle collision | 2159 (31%) | 971 (38%) | <0.001 |
| Pedestrian/bike versus auto | 280 (4%) | 88 (4%) | 0.22 |
| Other | 1069 (15%) | 394 (16%) | 0.80 |
| Liver injury | 182 (3%) | 55 (2%) | 0.22 |
| Spleen injury | 231 (3%) | 91 (4%) | 0.51 |
| Hospital length of stay | 5.6±9.5 | 5.6±8.6 | 0.84 |
| Mortality | 288 (4%) | 84 (3%) | 0.069 |
BMI, body mass index.