Table 3.
Survival and LOS stratified by ISS
| UM NSQIP Trauma | # Patients | % Patients | # Deaths | % Mortality | Mean LOS |
|---|---|---|---|---|---|
| ISS 1 – 15 | 191 | 36 | 0 | 0 | 7.2† |
| ISS 16 – 25 | 185 | 35 | 6 | 3† | 11.5† |
| ISS 26 – 35 | 98 | 19 | 17 | 17 | 13.0 |
| ISS > 35 | 51 | 10 | 21 | 41 | 28.6 |
|
| |||||
| Total | 525 | -- | 44 | 8.4%* | 11.1† |
| NTDB (2004) | # Patients | % Patients | # Deaths | % Mortality | Mean LOS |
|
| |||||
| ISS 1 – 15 | 41024 | 75 | 553 | 1 | 4.1 |
| ISS 16 – 25 | 8430 | 16 | 891 | 11 | 9.7 |
| ISS 26 – 35 | 3208 | 6 | 817 | 25 | 17.3 |
| ISS > 35 | 1816 | 3 | 862 | 47 | 26.5 |
|
| |||||
| Total | 54478 | -- | 3123 | 5.7% | 6.0 |
LOS, length of stay; ISS, Injury Severity Score; UM, University of Michigan; NSQIP, National Surgical Quality Improvement Program; NTDB, National Trauma Data Bank.
*
p<0.01, comparing total % mortality between UM NSQIP trauma patients and NTDB patients.
†
p=0.001, comparing % mortality or mean LOS between UM NSQIP trauma patients and NTDB patients within ISS groups.