Table 4.
Multivariate linear regression analysis of factors associated with total blood loss
| Variable | Coefficient B | SE | 95% CI for B | P value |
|---|---|---|---|---|
| Constant | 563.362 | 178.579 | 212.615–914.109 | 0.002 |
| Sex (male/female) | 53.183 | 22.211 | 9.559–96.806 | 0.017 |
| BMI (Kg/m2) | 14.083 | 7.907 | −1.446-29.613 | 0.075 |
| Anemia on admission | 107.230 | 25.027 | 58.073–156.386 | < 0.001 |
| Time from injury to hospital (h) | −0.552 | 0.231 | −1.006 - -0.098 | 0.017 |
| Type of fracture (intertrochanteric/femoral neck) | 126.319 | 21.644 | 83.809–168.830 | < 0.001 |
| Blood transfusion | 143.271 | 34.274 | 75.955–210.588 | < 0.001 |
| Serum calcium (hypocalcemia/normal) | 50.338 | 22.054 | 7.022–93.655 | 0.023 |
Abbreviations: SE Standard error, CI Confidence interval