Table 3.
A Cox regression analysis: The dependent variable is a death (yes or no) during the first year following a surgery for a proximal femur fracture in the elderly population. The covariables have been detected as having a statistically significant association with the dependent variable on a preliminary univariate analysis. CRF, chronic renal failure; IHD, ischemic heart disease; AF, atrial fibrillation; PAF, paroxysmal atrial fibrillation; MCV, mean corpuscle volume; RDW, red blood cell distribution.
| Variable | Hazard Ratio | 95% Confidence Interval | p Value | |
|---|---|---|---|---|
| Lower Limit | Upper Limit | |||
| Demographics and comorbidities | ||||
| Sex | 0.632 | 0.438 | 0.912 | 0.014 |
| CRF | 0.734 | 0.414 | 1.3 | 0.289 |
| IHD | 1.459 | 0.924 | 2.306 | 0.105 |
| AF/PAF | 1.175 | 0.681 | 2.028 | 0.561 |
| Colon cancer | 1.428 | 0.464 | 4.398 | 0.534 |
| Smoking | 0.556 | 0.241 | 1.283 | 0.169 |
| Blood laboratory tests | ||||
| NLR0 | 1.024 | 1.001 | 1.047 | 0.041 |
| Hemoglobin | 0.996 | 0.895 | 1.108 | 0.938 |
| MCV | 1.026 | 0.999 | 1.053 | 0.063 |
| RDW | 1.125 | 1.014 | 1.249 | 0.026 |
| Urea | 1.021 | 1.012 | 1.03 | <0.001 |
| Creatinine | 0.842 | 0.65 | 1.089 | 0.19 |
| Albumin | 0.34 | 0.218 | 0.53 | <0.001 |