Table 1 Comparison of the baseline characteristics of the infection and non-infection patients before and after PSM
Variable | Before PSM | After PSM | ||||||
|---|---|---|---|---|---|---|---|---|
Non-infection (n = 2073) | Infection (n = 74) | SMD | P | Non-infection (n = 140) | Infection (n = 70) | SMD | P | |
Age (median [IQR]) | 41 (32, 51) | 39 (31.3, 53) | 0.004 | 0.735 | 43 (32.5, 53) | 39 (32, 54.5) | 0.042 | 0.593 |
Date (median [IQR]) | 42970 (42604, 43291) | 42903 (42352, 43278.5) | 0.207 | 0.131 | 42927 (42582, 43185) | 42947.5 (42451.8, 43299.3) | 0.038 | 0.658 |
Public insurance (n, %) | 1384 (66.8) | 44 (59.5%) | 0.262 | 0.189 | 87 (62.1) | 43 (61.4) | 0.079 | 0.920 |
Living place (rural, %) | 1268 (61.2) | 54 (73.0) | 0.253 | 0.041 | 94 (67.1) | 50 (71.4) | 0.114 | 0.528 |
Sex (male, %) | 1513 (73.0) | 62 (83.8) | 0.265 | 0.040 | 110 (78.6) | 58 (82.9) | 0.016 | 0.464 |
Fracture location (%) | 0.082 | 0.759 | 0.147 | 0.793 | ||||
Ankle | 1073 (51.8) | 38 (51.4) | 69 (49.3) | 35 (50.0) | ||||
Calcaneus | 899 (43.4) | 31 (41.9) | 64 (45.7) | 30 (42.9) | ||||
Talus | 101 (4.9) | 5 (6.8) | 7 (5.0) | 5 (7.1) | ||||