ALB and congestive heart failure: When controlling for preoperative functional health status, history of CHF, mFI-5, ASA, preoperative albumin level, preoperative HCT level, preoperative WCC, multilevel corpectomy, and perioperative transfusion, unplanned surgery was found not to independently predict 30-day major complications (OR 1.09 [95% CI 0.84 to 1.41]; p = 0.49) (Table 3).