Table 1.
Summary statistics by split sets. Abbreviations: SD = standard deviation; Pctl. = percentile; AIS = Abbreviated Injury Scale.
| Variables | Training | Validation | Test |
|---|---|---|---|
| (N = 488,128) | (N = 244,036) | (N = 244,050) | |
| Socio-demographics | |||
| Age at injury (years) | |||
| Mean | 35.1 | 35.1 | 35.1 |
| SD | 25.5 | 25.6 | 25.6 |
| Pctl. 25 | 15 | 15 | 15 |
| Median | 27 | 27 | 27 |
| Pctl. 75 | 54 | 54 | 54 |
| Sex, n (%) | |||
| Male | 274,186 (56.2) | 136,412 (55.9) | 137,220 (56.2) |
| Rurality indicator, n (%) | |||
| Rural | 75,516 (15.5) | 37,578 (15.4) | 37,828 (15.5) |
| Income quintile, n (%) | |||
| Q1 (lowest income) | 99,290 (20.3) | 49,216 (20.2) | 49,390 (20.2) |
| Q2 | 94,866 (19.4) | 47,638 (19.5) | 47,518 (19.5) |
| Q3 | 96,042 (19.7) | 48,174 (19.7) | 47,708 (19.5) |
| Q4 | 98,886 (20.3) | 49,880 (20.4) | 49,914 (20.5) |
| Q5 (highest income) | 99,044 (20.3) | 49,128 (20.1) | 49,520 (20.3) |
| OHIP-specifica | |||
| Patients with a diagnosis, n (%) | 463,943 (95.1) | 231,889 (95.0) | 231,855 (95.0) |
| Total number of diagnoses | 20,441,616 | 10,290,796 | 10,271,548 |
| TBI-specificb | |||
| Patients with TBI | 244,064 | 122,018 | 122,025 |
| Injury severity, n (%) | |||
| Unknown | 111,387 (45.6) | 55,869 (45.8) | 55,958 (45.9) |
| Mild (AIS 1–2) | 101,081 (41.4) | 50,235 (41.2) | 50,087 (41.0) |
| Moderate (AIS = 3) | 6072 (2.5) | 3076 (2.5) | 3134 (2.6) |
| Severe (AIS >3) | 25,524 (10.5) | 12,838 (10.5) | 12,846 (10.5) |
| Cause of injury, n (%) | |||
| Falls | 109,485 (44.9) | 54,707 (44.8) | 54,703 (44.8) |
| Struck by/against | 84,382 (34.6) | 42,351 (34.7) | 42,012 (34.4) |
| Cyclist Collision | 5956 (2.4) | 3005 (2.5) | 3046 (2.5) |
| Motor Vehicle Collision | 25,742 (10.5) | 12,675 (10.4) | 13,137 (10.8) |
| Other | 21,263 (8.7) | 10,725 (8.8) | 10,586 (8.7) |
a
Summary for patients with OHIP diagnosis.
b
Summary for patients with TBI.