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ISS means of the four groups based on the ISS anatomical body regions and type of dispatch
| Groups | Mean ISS (SD) |
|---|---|
| Assist and injuries to the head and/or thorax | 20.69 (15.71) |
| Cancellation and injuries to the head and/or thorax | 10.08 (12.71) |
| Assist and injuries to the remaining parts of the body | 8.65 (11.88) |
| Cancellation and injuries to the remaining parts of the body | 2.22 (3.29) |
