Official Journal of the Italian Society of Orthopaedics and Traumatology
Variables | Total | Normal postoperative labs | Abnormal postoperative labs | P value |
---|---|---|---|---|
N (%) | 213 (100%) | 6 (11.6%) | 207 (88.4%) | Â |
Preoperative variables | ||||
 Age (years) | 72.7 ± 10.7 | 57.5 ± 9.3 | 73.2 ± 10.4 |  < 0.001 |
 Gender | 155F:58 M | 3F:3 M | 152F:55 M | 0.348 |
 BMI (kg/m2) | 22.4 ± 3.6 | 23.8 ± 2.1 | 22.4 ± 3.6 | 0.377 |
 ASA score | 2.8 ± 0.6 | 2.3 ± 0.5 | 2.8 ± 0.6 | 0.057 |
 Diabetes | 39 | 0 | 39 | 0.595 |
 Anemia | 89 | 0 | 89 | 0.042 |
 Hemoglobin level (g/L) | 119.6 ± 16.0 | 139.0 ± 9.7 | 119.0 ± 15.9 | 0.002 |
 Hypoalbuminemia | 22 | 0 | 22 | 0.871 |
 Albumin Level (g/L) | 39.4 ± 4.5 | 43.3 ± 1.9 | 39.3 ± 4.5 | 0.029 |
 Abnormal creatinine | 35 | 0 | 35 | 0.592 |
 Creatinine level (μmol/L) | 77.0 ± 52.4 | 73.7 ± 11.5 | 77.1 ± 53.1 | 0.875 |
 Abnormal sodium | 16 | 0 | 16 |  > 0.999 |
 Sodium level (mmol/L) | 140.9 ± 3.0 | 143.3 ± 1.8 | 140.9 ± 3.0 | 0.043 |
 Abnormal potassium | 19 | 0 | 19 | 0.959 |
 Potassium level (mmol/L) | 4.0 ± 0.4 | 4.1 ± 0.3 | 4.0 ± 0.5 | 0.783 |
 Abnormal calcium | 27 | 1 | 26 | 0.561 |
 Calcium level (mmol/L) | 2.25 ± 0.12 | 2.36 ± 0.10 | 2.25 ± 0.12 | 0.031 |
 Preoperative LOS (days) | 6.1 ± 3.7 | 4.2 ± 1.0 | 6.2 ± 3.7 | 0.189 |
Intraoperative variables | ||||
 TXA use | 192 | 6 | 186 | 0.787 |
 Estimated blood loss (mL) | 117.0 ± 93.5 | 75.0 ± 27.4 | 118.2 ± 94.5 | 0.266 |
 Operation time (min) | 69.0 ± 30.6 | 48.2 ± 16.6 | 69.6 ± 30.8 | 0.092 |
Postoperative variables | ||||
 Drop in hemoglobin (g/L) | 17.6 ± 11.0 | 8.5 ± 7.6 | 17.9 ± 11.0 | 0.040 |
 Drop in albumin (g/L) | 7.1 ± 4.1 | 4.7 ± 2.7 | 7.1 ± 4.1 | 0.147 |
 Drop in creatine (μmol/L) | 1.8 ± 20.6 | 6.7 ± 5.6 | 1.6 ± 20.8 | 0.553 |
 Drop in sodium (mmol/L) | 1.1 ± 3.1 | 2.3 ± 1.9 | 1.1 ± 3.2 | 0.326 |
 Drop in potassium (mmol/L) | − 0.34 ± 0.52 | − 0.32 ± 0.47 | − 0.34 ± 0.53 | 0.930 |
 Drop in calcium (mmol/L) | 0.16 ± 0.14 | 0.17 ± 0.11 | 0.18 ± 0.14 | 0.876 |
 Postoperative LOS (days) | 8.46 ± 3.5 | 6.0 ± 0.9 | 8.5 ± 3.6 |  < 0.001 |