Table 1.
Preoperative demographic characteristics in the training set
| Characteristics | Transfusion (n = 111) | Non-transfusion (n = 465) | t/z/χ2 | P |
|---|---|---|---|---|
| Age (year) | 77 (69-82) | 66 (56-77) | 7.87 | < 0.01* |
| Sex | 7.49 | < 0.01* | ||
| Female | 83 (22.7%) | 283 (77.3%) | ||
| Male | 28 (13.3%) | 182 (86.7%) | ||
| BMI (kg/m2) | 22 (20.3-24) | 23.2 (20.8-25.4) | 3.16 | < 0.01* |
| Hb (g/L) | 105.96 ± 14.08 | 126.62 ± 15.18 | 11.07 | < 0.01* |
| TXA | 13.29 | < 0.01* | ||
| No | 79 (24.6%) | 242 (75.4%) | ||
| Yes | 32 (12.5%) | 223 (87.5%) | ||
| Type of anesthesia | 1.33 | 0.25 | ||
| GA | 69 (20.9%) | 261 (79.1%) | ||
| CSEA | 42 (17.1%) | 204 (82.9%) | ||
| Waiting time (d) | 5 (4-7) | 5 (4-7) | 1.83 | 0.70 |
| Hypertension | 1.69 | 0.19 | ||
| No | 70 (17.8%) | 323 (82.2%) | ||
| Yes | 41 (22.4%) | 142 (77.6%) | ||
| Diabetes | 5.08 | 0.02* | ||
| No | 85 (17.6%) | 397 (82.4%) | ||
| Yes | 26 (27.7%) | 68 (72.3%) | ||
| Smoking | 5.08 | 0.02* | ||
| No | 99 (21.0%) | 372 (79%) | ||
| Yes | 12 (11.4%) | 93 (88.6%) | ||
| Alcohol | 2.93 | 0.09 | ||
| No | 96 (20.6%) | 369 (79.4%) | ||
| Yes | 15 (13.5%) | 96 (86.5%) | ||
| Surgical approach | 0.09 | 0.75 | ||
| HA | 87 (19.6%) | 358 (80.4%) | ||
| IF | 24 (18.3%) | 107 (81.7%) | ||
| Type of fracture | 3.63 | 0.06 | ||
| FNF | 87 (21.3%) | 322 (78.7%) | ||
| ITF | 24 (14.4%) | 143 (85.6%) |
Abbreviations: BMI body mass index, Hb hemoglobin, TXA tranexamic acid, GA general anesthesia, CSEA combined spinal and epidural anesthesia, HA hip arthroplasty, IF, internal fixation, FNF femoral neck fracture, ITF inter-trochanteric fracture
*: Statistically significant difference