Table 3.

Regression analysis of risk factors for overall complications

Risk Factor	Odds Ratio (95% CI)	P
Patient characteristics/Comorbidities
ASA class ≥ 3	1.838(1.561–2.164)	<.001
Body mass index	1.032(1.023–1.040)	<.001
Chronic steroid use	1.613(1.119–2.326)	.009
Metastatic cancer	2.527(1.388–4.599)	.002
Nonindependent functional status	1.580(1.234–2.024)	<.001
Preoperative delirium	2.593(1.135–5.924)	.021
Preoperative wound infection	1.587(1.302–1.933)	<.001
Prior surgery within 30 d	1.547(1.217–1.965)	.001
Ventilator dependency	5.017(2.262–11.128)	<.001
Intraoperative factors
Ambulatory surgery (vs inpatient)	0.334(0.284–0.393)	<.001
Surgical house-staff assistance	1.353(1.172–1.562)	<.001
Transfusion of >4 units of blood	2.481(1.228–5.015)	.023
Total RVUs/Surgical complexity	1.017(1.013–1.021)	<.001

^*C statistic = 0.787.