Table 2.
Covariates of male and female patients with high-risk OSTA scores before and after propensity-score matching analyses (1:1 matching via greedy method).
| Variables | Before Matching | After Matching | ||||||
|---|---|---|---|---|---|---|---|---|
| Female, n = 1585 | Male, n = 663 | Odds Ratio (95% CI) | p | Female, n = 573 | Male, n = 573 | Odds Ratio (95% CI) | p | |
| Age (years) | 80.6 ± 6.9 | 82.1 ± 6.3 | - | <0.001 | 81.4 ± 6.3 | 81.8 ± 6.4 | - | 0.402 |
| Co-morbidity, n (%) | ||||||||
| DM | 400 (25.2) | 92 (13.9) | 2.1 (1.64–2.68) | <0.001 | 80 (1.4) | 80 (1.4) | 1.0 (0.72–1.40) | 1.000 |
| HTN | 962 (60.7) | 310 (46.8) | 1.8 (1.47–2.11) | <0.001 | 282 (49.2) | 282 (49.2) | 1.0 (0.79–1.26) | 1.000 |
| CAD | 156 (9.8) | 59 (8.9) | 1.1 (0.82–1.53) | 0.488 | 49 (8.6) | 49 (8.6) | 1.0 (0.66–1.51) | 1.000 |
| CHF | 44 (2.8) | 17 (2.6) | 1.1 (0.62–1.91) | 0.778 | 12 (2.1) | 12 (2.1) | 1.0 (0.45–2.25) | 1.000 |
| CVA | 151 (9.5) | 91 (13.7) | 0.7 (0.50–0.87) | 0.003 | 73 (12.7) | 73 (12.7) | 1.0 (0.71–1.42) | 1.000 |
| Mechanism, n (%) | ||||||||
| Motor vehicle | 9 (0.6) | 3 (0.5) | 1.3 (0.34–4.66) | 1.000 | 1 (0.2) | 1 (0.2) | 1.0 (0.06–16.03) | 1.000 |
| Motorcycle | 133 (8.4) | 132 (19.9) | 0.4 (0.28–0.48) | <0.001 | 80 (14.0) | 80 (14.0) | 1.0 (0.72–1.40) | 1.000 |
| Bicycle | 74 (4.7) | 53 (8.0) | 0.6 (0.39–0.81) | 0.002 | 39 (6.8) | 39 (6.8) | 1.0 (0.63–1.58) | 1.000 |
| Pedestrian | 56 (3.5) | 18 (2.7) | 1.3 (0.77–2.25) | 0.321 | 15 (2.6) | 15 (2.6) | 1.0 (0.48–2.07) | 1.000 |
| Fall | 1277 (80.6) | 434 (65.5) | 2.2 (1.79–2.68) | <0.001 | 427 (74.5) | 427 (74.5) | 1.0 (0.77–1.30) | 1.000 |
| Penetrating injury | 7 (0.4) | 6 (0.9) | 0.5 (0.16–1.45) | 0.222 | 1 (0.2) | 1 (0.2) | 1.0 (0.06–16.03) | 1.000 |
| Struck by/against | 29 (1.8) | 17 (2.6) | 0.7 (0.39–1.30) | 0.262 | 10 (1.7) | 10 (1.7) | 1.0 (0.41–2.42) | 1.000 |
| ISS, median (IQR) | 9 (9–9) | 9 (9–13) | - | 0.001 | 9 (9–13) | 9 (9–13) | - | 0.400 |
CAD = coronary artery disease; CI = confidence interval; CVA = cerebral vascular accident; DM = diabetes mellitus; HTN = hypertension; IQR = interquartile range; ISS = injury severity score; OR = odds ratio.