Table 5 The balance test of propensity score matching (N = 988).
Variables | Preoperative DVT: No (n = 499) | Preoperative DVT: Yes (n = 499) | Standardized diff. | P-value |
|---|---|---|---|---|
Age (y) | 79.36 ± 6.54 | 79.41 ± 6.31 | < 0.01 | 0.90 |
Sex | 0.20 | < 0.01* | ||
Male | 171 (34.3) | 125 (25.1) | ||
Female | 328 (65.7) | 374 (74.9) | ||
Injury mechanism | 0.05 | |||
Falling | 492 (98.6) | 480 (96.2) | 0.15 | |
Accident | 5 (1) | 15 (3) | 0.14 | |
Other | 2 (0.4) | 4 (0.8) | 0.05 | |
Fracture classification | 0.36 | < 0.01* | ||
Intertrochanteric fracture | 252 (50.5) | 338 (67.7) | ||
Femoral neck fracture | 247 (49.5) | 161 (32.3) | ||
aCCI | 0.87 | |||
2 | 22 (4.4) | 17 (3.4) | 0.05 | |
3 | 101 (20.2) | 104 (20.8) | 0.01 | |
4 | 199 (39.9) | 212 (42.5) | 0.05 | |
5 | 123 (24.6) | 120 (24) | 0.01 | |
6 | 41 (8.2) | 32 (6.4) | 0.07 | |
7 | 11 (2.2) | 11 (2.2) | 0 | |
8 | 2 (0.4) | 3 (0.6) | 0.03 | |
Hypertension | 242 (48.5) | 260 (52.1) | 0.07 | 0.28 |
Diabetes | 97 (19.4) | 94 (18.8) | 0.02 | 0.87 |
CHD | 252 (50.5) | 260 (52.1) | 0.03 | 0.66 |
Arrhythmia | 146 (29.3) | 159 (31.9) | 0.06 | 0.41 |
Hemorrhagic stroke | 9 (1.8) | 11 (2.2) | 0.03 | 0.82 |
Ischemic stroke | 159 (31.9) | 145 (29.1) | 0.06 | 0.37 |
Cancer | 12 (2.4) | 15 (3) | 0.04 | 0.70 |
Associated injuries | 27 (5.4) | 46 (9.2) | 0.15 | 0.03* |
Dementia | 13 (2.6) | 27 (5.4) | 0.14 | 0.04* |
COPD | 30 (6) | 25 (5) | 0.04 | 0.58 |
Hepatitis | 20 (4) | 12 (2.4) | 0.09 | 0.21 |
Gastritis | 12 (2.4) | 3 (0.6) | 0.15 | 0.04 |
Treatment strategy | < 0.01* | |||
ORIF | 256 (51.3) | 336 (67.3) | 0.33 | |
HA | 234 (46.9) | 156 (31.3) | 0.32 | |
THA | 9 (1.8) | 7 (1.4) | 0.03 | |
Transfusion (U) | < 0.01* | |||
0 | 316 (63.3) | 271 (54.3) | 0.18 | |
1 | 0 (0) | 2 (0.4) | 0.09 | |
2 | 162 (32.5) | 188 (37.7) | 0.11 | |
4 | 21 (4.2) | 35 (7) | 0.12 | |
6 | 0 (0) | 3 (0.6) | 0.11 | |
Time to admission (h) | 77.14 ± 208.81 | 92.73 ± 216.17 | 0.07 | 0.25 |
Operation time (mins) | 92.37 ± 32.53 | 95.52 ± 38.41 | 0.09 | 0.16 |
Blood loss (mL) | 234.43 ± 137.74 | 240.96 ± 155.37 | 0.04 | 0.48 |
Infusion (mL) | 1588.52 ± 354.38 | 1597.62 ± 398.94 | 0.02 | 0.70 |
