Table V.
Hazard ratios and 95% confidence intervals for Cox analysis for open and endovascular repair of ruptured abdominal aortic aneurysms, hazard ratio <1 is protective, hazard ratio >1 is harmful, hazard ratio = 1 is indifferent
| Predictor | Hazard ratio | 95% Confidence interval | P value |
|---|---|---|---|
| Endovascular repair (n = 1,064) | |||
| Cerebrovascular | 1.630 | 1.263-2.103 | .0002 |
| Female gender | 1.267 | 1.065-1.507 | .0075 |
| Patient age at time of surgery** | 1.030 | 1.019-1.041 | <.0001 |
| Ruptured AAA hospital annual volume* | 0.972 | 0.950-0.995 | .0166 |
| Hyperlipidemia | 0.767 | 0.614-0.959 | .0200 |
| Open repair (n = 41,969) | |||
| Kidney transplant | 1.814 | 1.275-2.582 | .0009 |
| Liver diseases | 1.388 | 1.263-1.526 | <.0001 |
| Renal failure | 1.385 | 1.325-1.448 | <.0001 |
| Cancer | 1.243 | 1.179-1.310 | <.0001 |
| Cerebrovascular | 1.222 | 1.167-1.279 | .0001 |
| Other neurological | 1.185 | 1.128-1.245 | <.0001 |
| Female gender | 1.176 | 1.145-1.208 | <.0001 |
| Renal atherosclerosis | 1.161 | 1.014-1.329 | .0312 |
| Coronary | 1.112 | 1.084-1.142 | <.0001 |
| Diabetes | 1.109 | 1.065-1.155 | <.0001 |
| Rheumatoid arthritis | 1.103 | 1.017-1.196 | .0183 |
| White race | 1.084 | 1.034-1.137 | .0008 |
| Patient age at time of surgery | 1.041 | 1.040-1.043 | <.0001 |
| Chronic pulmonary | 1.025 | 1.002-1.050 | .0365 |
| OAAA annual hospital volume* | 0.999 | 0.998-0.999 | <.0001 |
| Ruptured AAA hospital annual volume* | 0.991 | 0.987-0.996 | .0002 |
| OAAA annual surgeon volume* | 0.990 | 0.988-0.991 | <.0001 |
| Congestive heart failure | 0.941 | 0.916-0.967 | <.0001 |
| Hypertension | 0.899 | 0.877-0.921 | <.0001 |
| Hyperlipidemia | 0.780 | 0.744-0.817 | <.0001 |
*
per one additional surgery.
**
per one additional calendar year.