Table 3.

Association of complications during index hospitalization with unplanned readmission related to index surgery assessed by a second Cox proportional hazard model that considered complications as binary covariates.^* REF: control group for comparison.

Category	p value	Hazard Ratio (HR)	95% HR Confidence Interval (low, high)
Acute renal failure complication at index hospitalization	0.003	6.0	1.8	19.6
Deep/OrganSpace SSI at Index Hospitalization	0.034	3.5	1.1	11.3

^*Also adjusted for the following factors, surgical procedure type, diagnosis group, gender, age, current smoker, >10% loss body weight in last 6 months, dyspnea, history of severe COPD, congestive heart failure in 30 days before surgery, hypertension requiring medication, insulin-dependent diabetes, steroid use for chronic condition, bleeding disorders, preoperative dialysis, ASA class, preoperative serum sodium, preoperative BUN, preoperative serum creatinine, preoperative WBC count, preoperative hematocrit, preoperative platelet count, preoperative INR, pulmonary embolism, unplanned intubation, cardiac arrest requiring CPR, myocardial infarction, and stroke/CVA with neurological deficit.