Principal CHIRPP variables used to describe circumstances
| Variable | No of values | Examples |
|---|---|---|
| Location | 57 | Own home, school, public park, highway |
| Area | 48 | Bathroom, stairs, swimming pool, bicycle path/lane |
| Context | 47 | Pedestrian, informal sports, food preparation, eating |
| Breakdown event | 22 | Fall on same level, collision, spill, structural fire, failure, malfunction |
| Breakdown, mechanism or contributing factors | 728 | Window glass, dog, television, barbeque, hammer, acetaminophen, dishwasher detergent, coffee table, ice hockey, light bulb, iron, radiator, lawn mower, swing |
| Intent | 7 | Unintentional, intentional self harm, maltreatment by parent or caregiver, sexual assault |