Variables | Training cohort (N = 616) | Validation cohort (N = 311) | p-value |
---|---|---|---|
Age (years) | 70.50 ± 13.10 | 69.76 ± 13.48 | 0.490 |
BMI (kg/m2) | 22.94 ± 3.21 | 22.90 ± 2.98 | 0.888 |
Sex | Â | Â | 0.594 |
 Male | 126 (20.5%) | 59 (19.0%) |  |
 Female | 490 (79.5%) | 252 (81.0%) |  |
Reasons of operation | Â | Â | 0.450 |
 FNF | 197 (32.0%) | 97 (31.2%) |  |
 ONFN | 257 (41.7%) | 142 (45.7%) |  |
 OAH | 162 (26.3%) | 72 (23.2%) |  |
 Operation time (min) | 91.62 ± 30.21 | 92.55 ± 31.68 | 0.977 |
 Intraoperative blood loss (mL) | 118.84 ± 112.39 | 132.19 ± 126.91 | 0.444 |
Type of anesthesia | Â | Â | 0.648 |
 GA | 321 (52.1%) | 167 (53.7%) |  |
 CSEA | 295 (47.9%) | 144 (46.3%) |  |
Smoking | Â | Â | 0.347 |
 No | 529 (85.9%) | 274 (88.1%) |  |
 Yes | 87 (14.1%) | 37 (11.9%) |  |
Drinking | Â | Â | 0.334 |
 No | 535 (86.9%) | 277 (89.1%) |  |
 Yes | 81 (13.1%) | 34 (10.9%) |  |
Hypertension | Â | Â | 0.395 |
 No | 275 (44.6%) | 148 (47.6% |  |
 Yes | 341 (55.4%) | 163 (52.4% |  |
Diabetes | Â | Â | 0.199 |
 No | 485 (78.7%) | 256 (82.3) |  |
 Yes | 131 (21.3) | 55 (17.7%) |  |
Cardiovascular disease | Â | Â | 0.783 |
 No | 541 (87.8%) | 278 (89.4%) |  |
 Yes | 75 (12.2%) | 33 (10.6%) |  |
Cerebrovascular disease | Â | Â | 0.276 |
 No | 516 (83.8%) | 269 (86.5%) |  |
 Yes | 100 (16.2%) | 42 (13.5%) |  |
Osteoporosis | Â | Â | 0.517 |
 No | 378 (61.4%) | 184 (59.2%) |  |
 Yes | 238 (38.6%) | 127 (40.8%) |  |
TP (g/L) | 65.70 ± 7.40 | 66.41 ± 7.19 | 0.164 |
ALB(g/L) | 37.76 ± 4.99 | 38.19 ± 4.76 | 0.208 |
GLB (g/L) | 27.82 ± 5.10 | 28.20 ± 5.33 | 0.330 |
SAA (mg/L) | 81.70 ± 94.98 | 93.45 ± 108.59 | 0.056 |
IRON (μmol/L) | 13.39 ± 12.30 | 13.10 ± 13.75 | 0.627 |
TIBC (μmol/L) | 46.97 ± 9.33 | 47.20 ± 10.28 | 0.787 |
CRP (mg/L) | 23.44 ± 32.77 | 27.54 ± 36.60 | 0.183 |
RBC (1,012/L) | 3.94 ± 1.58 | 3.94 ± 0.67 | 0.450 |
Hb(g/L) | 120.01 ± 20.13 | 121.47 ± 27.32 | 0.901 |
HCT (%) | 36.04 ± 6.36 | 36.42 ± 5.85 | 0.395 |
MCV (fL) | 93.30 ± 6.20 | 93.06 ± 6.81 | 0.823 |
MCH (pg) | 31.11 ± 2.42 | 30.86 ± 2.78 | 0.519 |
MCHC (g/L) | 333.08 ± 9.83 | 330.82 ± 11.68 | 0.055 |
Anemia | Â | Â | 0.376 |
 No | 381 (61.9%) | 183 (58.8%) |  |
 Yes | 235 (38.1%) | 128 (41.2%) |  |