Table 4.
Multivariable logistic regression model results
| Preoperative NLR Model | Postoperative NLR Model | |||||||
|---|---|---|---|---|---|---|---|---|
| 95% CI | 95% CI | |||||||
| OR | Low | High | P-value | OR | Low | High | P-value | |
| In-hospital death | ||||||||
| Chronic heart disease | 0.771 | 0.293 | 2.031 | .59 | 0.761 | 0.306 | 1.896 | .55 |
| Chronic kidney disease | 2.835 | 1.030 | 7.798 | .04 | 2.069 | 0.764 | 5.599 | .15 |
| Diabetes | 0.617 | 0.222 | 1.720 | .35 | 1.281 | 0.501 | 3.277 | .60 |
| Procedure type (open v. endo) | 1.460 | 0.556 | 3.834 | .44 | 0.673 | 0.265 | 1.711 | .40 |
| NLR (high vs. low) | 5.359 | 1.682 | 17.074 | .004 | 2.663 | 0.758 | 9.356 | .12 |
| PAD severity (rest pain v. claud.) | 2.059 | 0.551 | 7.688 | .28 | 1.394 | 0.351 | 5.538 | .63 |
| PAD severity (tissue loss v. claud.) | 0.949 | 0.277 | 3.259 | .93 | 1.439 | 0.503 | 4.121 | .49 |
| Renal failure | ||||||||
| Chronic heart disease | 1.276 | 0.815 | 1.999 | .28 | 1.213 | 0.834 | 1.765 | .31 |
| Chronic kidney disease | 4.797 | 3.006 | 7.655 | <.0001 | 4.495 | 3.063 | 6.598 | <.0001 |
| Diabetes | 1.652 | 1.007 | 2.708 | .04 | 2.089 | 1.400 | 3.117 | .0003 |
| Procedure type (open v. endo) | 1.537 | 0.983 | 2.403 | .05 | 1.471 | 1.010 | 2.143 | .04 |
| NLR (high vs. low) | 1.857 | 1.177 | 2.930 | .007 | 2.042 | 1.259 | 3.310 | .003 |
| PAD severity (rest pain v. claud.) | 1.361 | 0.616 | 3.008 | .44 | 1.576 | 0.870 | 2.857 | .13 |
| PAD severity (tissue loss v. claud.) | 2.252 | 1.266 | 4.006 | .005 | 2.072 | 1.324 | 3.243 | .001 |
| Cardiac/MI | ||||||||
| Chronic heart disease | 1.684 | 0.931 | 3.044 | .08 | 1.543 | 1.017 | 2.340 | .04 |
| Chronic kidney disease | 2.540 | 1.363 | 4.733 | .003 | 1.877 | 1.172 | 3.004 | .008 |
| Diabetes | 1.545 | 0.827 | 2.885 | .17 | 1.230 | 0.807 | 1.876 | .33 |
| Procedure type (open v. endo) | 1.520 | 0.854 | 2.705 | .15 | 1.472 | 0.972 | 2.229 | .06 |
| NLR (high vs. low) | 2.907 | 1.565 | 5.400 | .0007 | 1.057 | 0.672 | 1.664 | .80 |
| PAD severity (rest pain v. claud.) | 0.968 | 0.382 | 2.452 | .94 | 1.346 | 0.737 | 2.459 | .33 |
| PAD severity (tissue loss v. claud.) | 0.989 | 0.494 | 1.979 | .97 | 1.643 | 1.028 | 2.626 | .03 |
| Infection | ||||||||
| Chronic heart disease | 0.827 | 0.602 | 1.136 | .24 | 0.889 | 0.684 | 1.156 | .38 |
| Chronic kidney disease | 1.636 | 1.154 | 2.318 | .005 | 1.793 | 1.340 | 2.401 | <.0001 |
| Diabetes | 1.202 | 0.859 | 1.682 | .28 | 1.387 | 1.059 | 1.818 | .01 |
| Procedure type (open v. endo) | 1.219 | 0.885 | 1.678 | .22 | 1.060 | 0.815 | 1.381 | .66 |
| NLR (high vs. low) | 1.324 | 0.965 | 1.816 | .08 | 1.605 | 1.178 | 2.185 | .002 |
| PAD severity (rest pain v. claud.) | 2.779 | 1.448 | 5.335 | .002 | 2.401 | 1.480 | 3.896 | .000 |
| PAD severity (tissue loss v. claud.) | 14.06 | 8.720 | 22.685 | <.0001 | 8.972 | 6.284 | 12.81 | <.0001 |
| LOS > 10 days | ||||||||
| Chronic heart disease | 1.034 | 0.738 | 1.449 | .84 | 0.883 | 0.665 | 1.171 | .38 |
| Chronic kidney disease | 2.230 | 1.549 | 3.209 | <.0001 | 2.205 | 1.618 | 3.005 | <.0001 |
| Diabetes | 0.877 | 0.615 | 1.252 | .47 | 0.981 | 0.733 | 1.314 | .89 |
| Procedure type (open v. endo) | 2.700 | 1.919 | 3.799 | <.0001 | 1.613 | 1.209 | 2.154 | .001 |
| NLR (high v. low) | 2.645 | 1.886 | 3.709 | <.0001 | 2.896 | 1.971 | 4.255 | <.0001 |
| PAD severity (rest pain v. claud.) | 1.986 | 1.073 | 3.674 | .02 | 2.309 | 1.393 | 3.826 | .001 |
| PAD severity (tissue loss v. claud.) | 7.808 | 4.923 | 12.38 | <.0001 | 7.634 | 5.206 | 11.19 | <.0001 |
OR=odds ratio, CI=confidence interval, NLR=neutrophil to lymphocyte ratio, PAD=peripheral artery disease, MI=myocardial infarction
Patient demographics (age, race, gender) were also included in each model, but not these covariates were not included in the table.