| Patient characteristics and subgroups | Study year, no. (%)* | p | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2005 n = 3449 | 2006 n = 3677 | 2007 n = 3848 | 2008 n = 3691 | 2009 n = 3797 | 2010 n = 3908 | 2011 n = 4051 | |||||||||
| Male | 2643 | (76.6) | 2646 | (71.9) | 2686 | (69.8) | 2631 | (71.3) | 2694 | (70.9) | 2757 | (70.5) | 2874 | (70.9) | 0.52 |
| Mean age, yr (SD) | 50 | (21) | 50 | (21) | 51 | (22) | 53 | (22) | 53 | (22) | 54 | (22) | 54 | (22) | < 0.01 |
| ISS ≥ 25 | 1619 | (46.9) | 1707 | (46.4) | 1830 | (47.6) | 1816 | (49.2) | 1815 | (47.8) | 1858 | (47.5) | 1963 | (48.5) | 0.27 |
| Patient subgroups | |||||||||||||||
| Penetrating truncal injury | 159 | (4.6) | 146 | (4.0) | 148 | (3.8) | 157 | (4.2) | 153 | (4.0) | 133 | (3.4) | 136 | (3.4) | 0.06 |
| Shock in ED | 175 | (5.1) | 177 | (4.8) | 170 | (4.4) | 167 | (4.5) | 161 | (4.2) | 189 | (4.8) | 191 | (4.7) | 0.67 |
| Blunt multisystem injury | 1373 | (39.8) | 1479 | (40.2) | 1491 | (38.7) | 1326 | (35.9) | 1347 | (35.4) | 1410 | (36.1) | 1516 | (37.4) | < 0.01 |
| Older | 997 | (28.9) | 1069 | (29.1) | 1254 | (32.6) | 1249 | (33.8) | 1298 | (34.2) | 1361 | (34.8) | 1487 | (36.7) | < 0.01 |
| Isolated TBI | 1137 | (33.0) | 1181 | (32.1) | 1319 | (34.2) | 1298 | (35.2) | 1417 | (37.3) | 1396 | (35.7) | 1420 | (35.1) | < 0.01 |
Note: ED = emergency department, ISS = Injury Severity Score, TBI = traumatic brain injury. *Unless otherwise indicated.