Table IV.
Multivariable analysisa
| Variable | HR (95% CI) | P value |
|---|---|---|
| Follow-up method | ||
| In-person | Reference | — |
| Phone call | 3.48 (2.66-4.57) | <.001 |
| None | 6.45 (4.89-8.51) | <.001 |
| Age (per year) | 1.05 (1.04-1.06) | <.001 |
| Black race | 0.62 (0.37-1.04) | .07 |
| Primary insurance, self-pay | 2.61 (1.18-5.78) | .02 |
| Unfit for open surgery | 1.60 (1.28-2.00) | <.001 |
| Smoking (any) | 1.27 (0.97-1.68) | .09 |
| CHF | 1.60 (1.26-2.03) | <.001 |
| COPD | 1.25 (1.02-1.54) | .03 |
| Dialysis | 2.68 (1.56-4.62) | <.001 |
| Postoperative renal failure | ||
| Acute kidney injury | 1.66 (1.06-2.62) | .03 |
| Temporary dialysis | 5.80 (2.44-13.8) | <.001 |
| Discharge to nursing home | 2.01 (1.39-2.90) | .04 |
CHF, Congestive heart failure; CI, confidence interval; COPD, chronic obstructive pulmonary disease; HR, hazard ratio.
a
C statistic = 0.81.