Table 3.
Postoperative information and proportion in different BMI classifications after hip fracture
| Total (n = 644) | UWa (n = 105) | NWa (n = 362) | OWa (n = 126) | OBa (n = 30) | P value | |
|---|---|---|---|---|---|---|
| Transfusion, n (%) | 0.011* | |||||
| No | 362 (56) | 46 (44) | 207 (57) | 76 (60) | 22 (73) | |
| Yes | 282 (44) | 59 (56) | 155 (43) | 50 (40) | 8 (27) | |
| Postoperative anemia, n (%) | 488 (76) | 84 (80) | 277 (77) | 90 (71) | 23 (77) | 0.277 |
| No anemia | 153 (24) | 20 (19) | 83 (23) | 36 (29) | 7 (23) | |
| Mild anemia | 382 (59) | 62 (59) | 213 (59) | 76 (60) | 19 (63) | |
| Moderate anemia | 102 (16) | 22 (21) | 61 (17) | 14 (11) | 3 (10) | |
| Severe anemia | 4 (1) | 0 | 3 (1) | 0 | 1 (3) | |
| Extremely severe anemia | 0 | 0 | 0 | 0 | 0 | |
| 30-day mortality, n (%) | 11 (2) | 4 (4) | 4 (1) | 3 (2) | 0 | 0.239 |
| 3-mouth mortality, n (%) | 30 (5) | 9 (9) | 14 (4) | 5 (4) | 1 (3) | 0.240 |
| 1-year mortality, n (%) | 56 (9) | 17 (16) | 31 (9) | 6 (5) | 1 (3) | 0.013* |
| Complications, n (%) | 160 (25) | 30 (29) | 82 (23) | 34 (27) | 9 (30) | 0.485 |
| Major complications(Life-threatening), n (%) | 119 (18) | 29 (28) | 56 (15) | 22 (17) | 9 (30) | 0.014* |
| Acute renal failure | 78 (12) | 20 (19) | 34 (9) | 16 (13) | 6 (20) | 0.029* |
| Pulmonary embolism | 6 (1) | 2 (2) | 4 (1) | 0 | 0 | 0.516 |
| Myocardial infarction | 14 (2) | 3 (3) | 8 (2) | 3 (2) | 0 | 0.964 |
| Stroke | 14 (2) | 4 (4) | 5 (1) | 3 (2) | 2 (7) | 0.108 |
| Arrhythmia | 22 (3) | 3 (3) | 12 (3) | 4 (3) | 2 (7) | 0.669 |
| Minor complications(No life-threatening), n (%) | 108 (17) | 23 (22) | 54 (15) | 23 (18) | 5 (17) | 0.383 |
| Pneumonia | 24 (4) | 6 (6) | 9 (2) | 4 (3) | 3 (10) | 0.081 |
| Pulmonary insufficiency | 17 (3) | 4 (4) | 8 (2) | 4 (3) | 1 (3) | 0.618 |
| Other site infections | 9 (1) | 0 | 4 (1) | 4 (3) | 1 (3) | 0.112 |
| Heart failure | 28 (4) | 7 (7) | 14 (4) | 6 (5) | 1(3) | 0.611 |
| Delirium | 45 (7) | 8 (8) | 29 (8) | 5 (4) | 2 (7) | 0.499 |
*Denotes statistical significance
aUnderweight (UW) (BMI < 18.5 kg/m2), normal weight (NW) (BMI 18.5–24.9 kg/m2), overweight (OW) (BMI 25.0–29.9 kg/m2), obese (OB) (BMI ≥ 30.0 kg/m2)