Table 1
Representativeness of the CHIRPP: Ottawa-Carleton region, Ontario, Canada, summer 1992
| Predictor variable | No | Missed by CHIRPP (%) | Odds ratio of being missed (unadjusted) | 95% Confidence interval |
|---|---|---|---|---|
| Sex | ||||
| Male | 1416 | 36 | 1.08 | 0.91 to 1.28 |
| Female | 964 | 34 | 1.00 | |
| Day | ||||
| Weekend | 784 | 37 | 1.13 | 0.94 to 1.34 |
| Weekday | 1601 | 34 | 1.00 | |
| Time of presentation | ||||
| Night (1701-0759) | 1212 | 33 | 0.85 | 0.72 to 1.01 |
| Day (0800-1700) | 1165 | 37 | 1.00 | |
| Injury intent | ||||
| Unintentional | 2326 | 35 | 0.44 | 0.14 to 1.46 |
| Intentional | 11 | 55 | 1.00 | |
| Nature of injury | ||||
| Laceration/abrasion | 617 | 41 | 1.37 | 1.11 to 1.68 |
| Sprain | 268 | 44 | 1.55 | 1.18 to 2.03 |
| Fracture/dislocation | 455 | 24 | 0.60 | 0.47 to 0.78 |
| Concussion | 24 | 17 | 0.39 | 0.14 to 1.10 |
| Other | 1011 | 34 | 1.00 | |
| Disposition | ||||
| Admitted | 76 | 17 | 0.37 | 0.20 to 0.68 |
| Treated and released | 2295 | 36 | 1.00 | |
| Age (years) | ||||
| >14 | 503 | 59 | 3.57 | 2.91 to 4.38 |
| ≤14 | 1843 | 29 | 1.00 | |
| Total | 2386 | 35 |
