Table 6 The balance test of PSM
From: Elevated albumin: a protective factor against mortality in geriatric hip fracture patients
Variables | Survival (690) | Mortality (690) | Standardized difference | P value |
|---|---|---|---|---|
Age (year) | 83.22 ± 4.54 | 81.87 ± 6.29 | 0.25 (0.14, 0.35) | < 0.001* |
Sex | Â | Â | 0.09 (-0.01, 0.20) | 0.09 |
 Male | 226 (32.75%) | 256 (37.10%) |  |  |
 Female | 464 (67.25%) | 434 (62.90%) |  |  |
Occupation | Â | Â | 0.12 (0.01, 0.22) | 0.09 |
 Retirement | 442 (64.06%) | 414 (60.00%) |  |  |
 Farmer | 127 (18.41%) | 160 (23.19%) |  |  |
 Other | 121 (17.54%) | 116 (16.81%) |  |  |
History of allergy | Â | Â | 0.03 (-0.08, 0.13) | 0.617 |
 No | 673 (97.54%) | 670 (97.10%) |  |  |
 Yes | 17 (2.46%) | 20 (2.90%) |  |  |
Injury mechanism | Â | Â | 0.08 (-0.02, 0.19) | 0.314 |
 Falling | 675 (97.83%) | 677 (98.12%) |  |  |
 Accident | 12 (1.74%) | 7 (1.01%) |  |  |
 Other | 3 (0.43%) | 6 (0.87%) |  |  |
Fracture classification | Â | Â | 0.11 (0.00, 0.22) | 0.123 |
 Intertrochanteric fracture | 511 (74.06%) | 534 (77.39%) |  |  |
 Femoral neck fracture | 171 (24.78%) | 143 (20.72%) |  |  |
 Subtrochanteric fracture | 8 (1.16%) | 13 (1.88%) |  |  |
aCCI |  |  | 0.39 (0.28, 0.49) | < 0.001* |
 2 | 2 (0.29%) | 8 (1.16%) |  |  |
 3 | 14 (2.03%) | 73 (10.58%) |  |  |
 4 | 317 (45.94%) | 303 (43.91%) |  |  |
 5 | 254 (36.81%) | 209 (30.29%) |  |  |
 6 | 86 (12.46%) | 74 (10.72%) |  |  |
 7 | 15 (2.17%) | 20 (2.90%) |  |  |
 8 | 2 (0.29%) | 3 (0.43%) |  |  |
Hypertension | Â | Â | 0.05 (-0.06, 0.15) | 0.36 |
 No | 329 (47.68%) | 346 (50.14%) |  |  |
 Yes | 361 (52.32%) | 344 (49.86%) |  |  |
Diabetes | Â | Â | 0.04 (-0.07, 0.15) | 0.459 |
 No | 547 (79.28%) | 558 (80.87%) |  |  |
 Yes | 143 (20.72%) | 132 (19.13%) |  |  |
CHD | Â | Â | 0.03 (-0.08, 0.13) | 0.626 |
 No | 316 (45.80%) | 307 (44.49%) |  |  |
 Yes | 374 (54.20%) | 383 (55.51%) |  |  |
Arrhythmia | Â | Â | 0.00 (-0.10, 0.11) | 0.955 |
 No | 449 (65.07%) | 448 (64.93%) |  |  |
 Yes | 241 (34.93%) | 242 (35.07%) |  |  |
Hemorrhagic stroke | Â | Â | 0.00 (-0.11, 0.11) | 1 |
 No | 678 (98.26%) | 678 (98.26%) |  |  |
 Yes | 12 (1.74%) | 12 (1.74%) |  |  |
Ischemic stroke | Â | Â | 0.02 (-0.08, 0.13) | 0.688 |
 No | 462 (66.96%) | 469 (67.97%) |  |  |
 Yes | 228 (33.04%) | 221 (32.03%) |  |  |
Cancer | Â | Â | 0.05 (-0.05, 0.16) | 0.327 |
 No | 667 (96.67%) | 660 (95.65%) |  |  |
 Yes | 23 (3.33%) | 30 (4.35%) |  |  |
Associated injuries | Â | Â | 0.05 (-0.06, 0.15) | 0.373 |
 No | 643 (93.19%) | 651 (94.35%) |  |  |
 Yes | 47 (6.81%) | 39 (5.65%) |  |  |
Dementia | Â | Â | 0.06 (-0.05, 0.16) | 0.297 |
 No | 655 (94.93%) | 646 (93.62%) |  |  |
 Yes | 35 (5.07%) | 44 (6.38%) |  |  |
COPD | Â | Â | 0.03 (-0.08, 0.13) | 0.602 |
 No | 643 (93.19%) | 638 (92.46%) |  |  |
 Yes | 47 (6.81%) | 52 (7.54%) |  |  |
Hepatitis | Â | Â | 0.00 (-0.11, 0.11) | 1 |
 No | 665 (96.38%) | 665 (96.38%) |  |  |
 Yes | 25 (3.62%) | 25 (3.62%) |  |  |
Gastritis | Â | Â | 0.00 (-0.11, 0.11) | 1 |
 No | 677 (98.12%) | 677 (98.12%) |  |  |
 Yes | 13 (1.88%) | 13 (1.88%) |  |  |
Time to admission (h) | 94.38 ± 314.44 | 85.11 ± 157.26 | 0.04 (-0.07, 0.14) | 0.489 |
Operation | Â | Â | 0.09 (-0.01, 0.20) | 0.236 |
 ORIF | 508 (73.62%) | 535 (77.54%) |  |  |
 HA | 180 (26.09%) | 153 (22.17%) |  |  |
 THA | 2 (0.29%) | 2 (0.29%) |  |  |
Operation time (mins) | 90.04 ± 32.51 | 91.54 ± 33.14 | 0.05 (-0.06, 0.15) | 0.394 |
Blood loss (mL) | 237.07 ± 157.23 | 242.80 ± 142.73 | 0.04 (-0.07, 0.14) | 0.479 |
Infusion (mL) | 1502.74 ± 345.87 | 1509.04 ± 371.50 | 0.02 (-0.09, 0.12) | 0.744 |
Transfusion (U) | 1.24 ± 1.25 | 1.30 ± 1.24 | 0.05 (-0.06, 0.15) | 0.377 |
Time to operation (d) | 4.26 ± 2.41 | 4.51 ± 2.85 | 0.09 (-0.01, 0.20) | 0.082 |