Predictor variables and the associated levels/baselines used when modeling injury severity for single-vehicle accidents in Florida (United States) from 2006–2013.
| Predictor | Levels of predictor | Base level for model |
|---|---|---|
| Gender | Female Male | Female |
| Age | Continuous variable | None |
| Seatbelt use | Yes No | No |
| Airbag deployed | Yes No | No |
| Occupant ejected | Yes No Partially | No |
| Drug/Alcohol use | Yes No | No |
| Estimated speed | Continuous variable | None |
| Land use | Rural Urban | Rural |
| Road type | County/State Forest Interstate/Tollway Local | County/State |
| Shoulder type | Curb Paved Unpaved | Curb |
| Road surface conditions | Dry Loose Slippery Standing water | Dry |
| Light conditions | Daylight Dark Dark w/lighting Dawn/Dusk | Daylight |
| Weather conditions | Clear Cloudy Low visibility Precipitation Severe winds | Clear |
| Crash type | Barrier Ditch Fence No fixed object Other Pole Rollover Sign Structure Tree Water | Tree |