Table 2.
Patient Characteristics of NEXUS Chest imaging studies
| Patient Characteristics | |||||
|---|---|---|---|---|---|
| Characteristic | CXR Derivation1 | CXR Validation2 | CT Derivation3 | CT Validation4 | TOTAL |
| Number | 2,628 | 9,905 | 6,002 | 5,475 | 24,010 |
| Gender: | |||||
| Male (%) | 1,698 (64.6) | 6,220 (62.8) | 3,583 (59.7) | 3,384 (61.8) | 14,885 (62.0) |
| Female | 930 (35.4) | 3,685 (37.2) | 2,419 (40.3) | 2,091 (38.2) | 9,125 (38.0) |
| Age, years, median (IQR) | 42 (28-57) | 45 (29-60) | 46 (29-62) | 45 (28-61) | 45 (29-61) |
| Mechanism of Injury: | |||||
| Motor vehicle crash (%) | 926 (35.2) | 3,463 (35.0) | 2,141 (35.7) | 1,945 (35.5) | 8,476 (35.3) |
| Motorcycle crash | 254 (9.7) | 878 (8.9) | 466 (7.8) | 594 (10.8) | 2,192 (9.1) |
| Pedestrian struck by vehicle | 418 (15.9) | 1,057 (10.7) | 498 (8.3) | 543 (9.9) | 2,516 (10.5) |
| Bicycle crash | 194 (7.4) | 624 (6.3) | 427 (7.1) | 408 (7.5) | 1,653 (6.9) |
| Fall | 535 (20.4) | 2,726 (27.5) | 1,781 (29.7) | 1,368 (25.0) | 6,410 (26.7) |
| Struck by object or assault | 177 (6.7) | 577 (5.8) | 416 (6.9) | 305 (5.6) | 1,475 (6.1) |
| Other or unknown | 124 (4.7) | 580 (5.9) | 273 (4.5) | 312 (5.7) | 1,289 (5.4) |
| GCS score, median (IQR) | 15 (15-15) | 15 (15-15) | 15 (15-15) | 15 (15-15) | 15 (15-15) |
| Admitted to hospital (%) | 5,173 (52.2) | 2,768 (46.1) | 2,733 (49.9) | 5,501 (47.9) | |
| Survival to discharge (%) | 4877 (94.3) | 2,599 (93.9) | 2,575 (94.2) | 5,174 (94.1) | |
| Hospital LOS, median (IQR) | 3 (1-5) | 3 (1-5) | 3 (1-5) | 3 (1-5) | |
| ISS, median (IQR) | 5 (1-10) | 5 (1-10) | 5 (1-10) | ||
| Imaging: | |||||
| CXR only (%) | 2,044 (78) | 4,817 (48.6) | 3,741 (62.3) | 2,555 (46.7) | 13,157 (54.8) |
| CXR and CT | 554 (21) | 4,828 (48.7) | 1,873 (31.2) | 2,628 (48) | 9,883 (41.2) |
| CT only | 30 (1) | 260 (2.6) | 388 (6.5) | 292 (5.3) | 970 (4.0) |
CXR = chest X-ray
CT = computed tomography
SD = standard deviation
IQR = interquartile range
GCS = Glasgow coma scale
LOS = length of stay
ISS = Injury severity score
1
= July 2007-August 2009;
2
= December 2009-January 2012;
3
= September 2011-December 2012;
4
= February 2013-May 2014