Table 2.
Univariate analysis of risk factors for allogenic blood transfusion (ABT) within 72 hours from admission in 1,484 patients with hip fractures
| Variable | No ABT within 72 hours | ABT within 72 hours | P value | |
|---|---|---|---|---|
| Age at Admission (years) | 80.6 (10.6) | 83.4 (9.3) | < 0.001* | |
| Gender (Female/Male) | 64 %/36 % | 78 %/22 % | < 0.001§ | |
| Surgery time (minutes) | 102 (24) | 108 (34) | < 0.001* | |
| Time admission to surgery (hours) | 68.91 (76.78) | 39.55 (34.9) | ||
| Log | 3.8 (0.86) | 3.4 (0.71) | < 0.001* | |
| Haemoglobin at admission (g/dL) | 12.83 (1.4) | 11.39 (1.57) | < 0.001 * | |
| MCV at admission (fl) | 82.22 (5.4) | 88.62 (6.37) | 0.06* | |
| Creatinine at admission (mg/dL) | 1.21 (0.6) | 1.25 (0.56) | ||
| Log | 0.12 (0.32) | 0.15 (0.33) | 0.06* | |
| INR at admission | 1.15 (0.52) | 1.08 (0.37) | 0.04¥ | |
| Type of implant | Hemiarthroplasty | 48 % | 24.6 % | < 0.001 § |
| Cephalomedullary nail | 7.3 % | 18.7 % | ||
| Dynamic hip screw | 44.4 % | 56.6 % | ||
| Statins used (%) | 34 % | 31 % | 0.32§ | |
| Proton pump inhibitors used (%) | 38 % | 35 % | 0.23§ | |
| Diabetes mellitus drugs used (%) | 14 % | 14 % | 0.69§ | |
| Aspirin used (%) | 22 % | 20 % | 0.27§ | |
| Clopidogral used (%) | 5 % | 5 % | 0.99§ | |
MCV mean corpuscular volume, INR international normalised ratio
*Two sample t-test
¥Two sample wilcoxon test
§Chi-square test
The values are given as the mean and the standard deviation for continuous variables and as the number of patients, with the percentage in parentheses, for categorical variables