Table 4.
Comparison of April 2019 and 2020 injury characteristics and patient outcomes
| Injury characteristic | April 2019 (n=7398)* | April 2020 (n=4997)* | 2019 to 2020 patient volume absolute change (%) | 2019 to 2020 proportional change (%)† | P value for proportional change‡ |
| ISS, mean (SD) | 8.3 (7.5) | 9.0 (7.5) | <0.001 | ||
| Mild (1 to 8), no. (%) | 3881 (52.6) | 2344 (46.9) | −39.6 | −5.6 | <0.001 |
| Moderate (9 to 15), no. (%) | 2573 (34.8) | 1904 (38.1) | −26.0 | 3.3 | <0.001 |
| Severe (16 to 24), no. (%) | 531 (7.2) | 433 (8.7) | −18.5 | 1.5 | 0.002 |
| Very severe (>24), no. (%) | 400 (5.4) | 315 (6.3) | −21.2 | 0.9 | 0.036 |
| GCS, mean (SD) | 14.3 (2.3) | 14.2 (2.5) | 0.009 | ||
| Mild (13 to 15), no. (%) | 6652 (93.8) | 4474 (92.6) | −32.7 | −1.3 | 0.491 |
| Moderate (9 to 12), No. (%) | 151 (2.1) | 122 (2.5) | −19.2 | 0.4 | 0.136 |
| Severe (3 to 8), no. (%) | 288 (4.1) | 238 (4.9) | −17.4 | 0.9 | 0.018 |
| Injury type | |||||
| Blunt, no. (%) | 6692 (90.5) | 4364 (87.3) | −34.8 | −3.1 | <0.001 |
| Penetrating, no. (%) | 537 (7.3) | 500 (10) | −6.9 | 2.7 | <0.001 |
| Fall, no. (%) | 4151 (56.1) | 2828 (56.6) | −31.9 | 0.5 | 0.594 |
| MVC, no. (%) | 1249 (16.9) | 628 (12.6) | −49.7 | −4.3 | <0.001 |
| Firearm, no. (%) | 204 (2.8) | 212 (4.2) | 3.9 | 1.5 | <0.001 |
| Cut/pierce, no. (%) | 291 (3.9) | 259 (5.2) | −11.0 | 1.2 | <0.001 |
| MVC ISS, mean (SD) | 10.0 (9.5) | 11.1 (9.6) | 0.003 | ||
| Hospital LOS, mean (SD), d | 5.1 (8.2) | 4.5 (5.1) | <0.001 | ||
| Deaths, no. (%) | 207 (2.8) | 181 (3.6) | −12.6 | 0.8 | 0.010 |
| Discharge disposition | |||||
| Home, no. (%) | 4475 (68.1) | 2970 (69.1) | −33.6 | 1.0 | 0.24 |
| Skilled nursing facility, no. (%) | 2051 (31.2) | 1301 (30.3) | −36.6 | −1.0 | 0.038 |
| Transfer, no. (%) | 42 (0.6) | 25 (0.6) | −40.5 | −0.1 | 0.616 |
*Categorical data may not equal the total number of patients due to missing demographic information.
†Proportional change and absolute change calculated only for categorical variables.
‡P value test used: Kruskal-Wallis H test for continuous variables, Pearson’s χ2 test for category proportion comparisons.
GCS, Glasgow Coma Score; ICU, intensive care unit; ISS, injury severity score; LOS, length of stay; MVC, motor vehicle collision.