Table 5.

Regression analysis of risk factors for reoperation

Risk Factor	Odds Ratio (95% CI)	P
Patient characteristics/Comorbidities
ASA class ≥ 3	1.281(1.137–1.381)	.001
Hypertension	1.331(1.116–1.587)	.001
History of previous cardiac surgery	0.663(0.452–0.971)	.035
Nonindependent functional status	1.335(1.028–1.734)	.030
Non-Caucasian race	0.785(0.650–0.948)	.012
Preoperative sepsis	1.823(1.338–2.483)	<.001
Preoperative wound infection	1.980(1.603–2.447)	<.001
Prior surgery within 30 d	2.017(1.581–2.574)	<.001
Renal failure	3.737(1.723–8.102)	.001
Intraoperative factors
Ambulatory surgery (vs inpatient)	0.352(0.293–0.422)	<.001
Surgical house-staff assistance	1.472(1.253–1.730)	<.001

^*C statistic = 0.775.