Comparison of severe pelvic fracture patients between ATDB and NTDB before and after propensity score matching
| Variables | ATDB (n=160) | Comparison with, before matching | Comparison with, after matching | ||
| NTDB (n=6438) | P values | NTDB (n=160) | P values | ||
| Covariates | |||||
| Age, years | 48.5 (35–61) | 46 (29–46) | 0.044 | 48 (34–61) | 0.889 |
| Sex, male | 93 (58.1) | 4157 (64.6) | 0.093 | 100 (62.5) | 0.424 |
| SBP at admission, mm Hg | 100 (72–116) | 118 (98–136) | <0.001 | 104 (81.25–124) | 0.218 |
| GCS at admission | 13 (5–15) | 15 (11–15) | <0.001 | 15 (3–15) | 0.222 |
| Pelvic AIS | 5 (4–5) | 4 (4–5) | <0.001 | 4 (4–5) | 0.434 |
| Head AIS | 0 (0–2) | 0 (0–2) | 0.006 | 0 (0–2) | 0.398 |
| Thorax AIS | 3 (0–3) | 3 (0–3) | 0.665 | 1.5 (0–3) | 0.850 |
| Abdomen AIS | 0 (0–3) | 2 (0–3) | 0.005 | 0 (0–3) | 0.670 |
| ISS | 34 (26–43) | 29 (21–41) | 0.001 | 33.5 (25–45) | 0.448 |
| Mechanism of injury | <0.001 | 0.819 | |||
| Traffic related | 89 (55.6) | 5081 (78.5) | 90 (56.3) | ||
| Falls | 57 (35.6) | 1044 (16.2) | 59 (36.9) | ||
| Other | 14 (8.8) | 313 (4.9) | 11 (6.9) | ||
| Transfer, yes | 88 (55) | 1991 (30.9) | <0.001 | 93 (58.1) | 0.573 |
| Outcomes | |||||
| Hospital LOS, days | 36.5 (3–81) (n=160) | 10 (5–19) (n=6341) | <0.001 | 8 (2–18) (n=160) | <0.001 |
| ICU LOS, days | 13 (6–34) (n=95) | 5 (3,12) (n=4592) | <0.001 | 5 (2.5–14.5) (n=105) | <0.001 |
| Ventilator, days | 14 (5.75–26.5) (n=90) | 5 (2–12)(n=3021) | <0.001 | 4 (1.9) (n=77) | <0.001 |
| Mortality | 59 (36.9) | 1077 (16.7) | <0.001 | 37 (23.1) | 0.007 |
All continuous variables were shown as a median (IQR) and compared by Mann-Whitney U test.
All categorical variables were shown as a number (percentage) and compared by χ2.
AIS, Abbreviated Injury Scale; ATDB, Ajou Trauma Data Bank; GCS, Glasgow Coma Scale; ICU, intensive care unit; ISS, Injury Severity Score; LOS, length of stay; NTDB, National Trauma Data Bank; SBP, systolic blood pressure.