| Factor | OR (95% CI)* |
| Sex | |
| Boys | 1.14 (0.87 to 1.49) |
| Girls | 1.00 |
| Age group, years | |
| 5–9 | 1.00 |
| 10–14 | 1.91 (1.34 to 2.71) |
| 15–18 | 2.28 (1.64 to 3.18) |
| Insurance type | |
| Medicare and Medicaid | 1.12 (0.80 to 1.56) |
| Private including HMO | 1.00 |
| Uninsured | 1.21 (0.68 to 2.15) |
| Other | 0.81 (0.46 to 1.42) |
| Admission source | |
| Emergency room | 1.00 |
| Transfer from a hospital / healthcare facility | 0.34 (0.20 to 0.58) |
| Other | 0.86 (0.62 to 1.19) |
| Hospital bed size | |
| Small | 1.00 |
| Medium | 1.06 (0.68 to 1.65) |
| Large | 0.97 (0.65 to 1.44) |
| Hospital region | |
| Northeast | 1.00 |
| Midwest | 0.46 (0.31 to 0.68) |
| South | 0.47 (0.31 to 0.69) |
| West | 0.53 (0.35 to 0.78) |
| Teaching status of hospital | |
| Non-teaching | 1.91 (1.44 to 2.53) |
| Teaching | 1.00 |
| Hospital location | |
| Rural | 1.75 (1.11 to 2.77) |
| Urban | 1.00 |
Analysis adjusted for median household income, external cause of injury and all the variables listed in the table, weighted to discharges from all community, non-rehabilitation hospitals in the USA.
* Reference category: other sport-related traumatic brain injuries.