Distribution of patients by injury severity (ISS) in three data sources and the comparison with NISS
| ISS | ||||
|---|---|---|---|---|
| ISS/NISS categories | NPTR* No (%) | UHDDS† No (%) | Trauma registry‡ No (%) | NISS: NPTR* No (%) |
| *NPTR = National Pediatric Trauma Registry (ISS derived from AIS-90, NISS derived from AIS-90). | ||||
| †UHDDS Massachusetts Uniform Hospital Discharge Data Set (ISS derived from AIS-85). | ||||
| ‡Trauma registry (ISS derived from AIS-90). | ||||
| Minor (ISS/NISS 1–3) | 8 433 (20) | 5 855 (14) | 314 (16) | 8 621 (20) |
| Moderate (ISS/NISS 4–8) | 17 668 (43) | 18 811 (45) | 754 (38) | 17 926 (43) |
| Serious (ISS/NISS 9–15) | 8 926 (22) | 14 804 (36) | 618 (31) | 10 091 (24) |
| Severe (ISS/NISS 16–24) | 3 124 (8) | 1 846 (4) | 182 (9) | 3 384 (8) |
| Critical (ISS/NISS 25–75 | 2 738 (7) | 615 (1) | 107 (6) | 1 557 (5) |
| Median | 5 | 5 | 5 | 5 |
| Mean | 7 | 8 | 9 | 10 |
| Mode | 4 | 4 | 4 | 4 |