Joeky Senders

30 Chapter 2 TABLE 1. Continued. Characteristic (%) Definition Total percentage (n=7376) Major complication (n=948) No complication (n=6428) OR 95% CI p Transfusion 0.2 d 0.5 0.2 3.09 1.07-8.92 .03 Bleeding disorder 2.2 4.3 1.9 2.37 1.66-3.41 <.001 Dyspnea 2.6 4.2 2.3 1.86 1.30-2.65 .001 Insulin dependent DM 3.9 6.4 3.5 1.91 1.42-2.54 <.001 Pre-op steroid usage 16.6 20.9 16.0 1.38 1.17-1.64 <.001 Dependent functional status a 5.1 10.1 4.4 2.41 1.88-3.07 <.001 Preoperative sodium b 135-145 mEq/L 89.9 86.7 90.4 Ref. - - <135 mEq/L 9.1 11.6 8.7 1.38 1.10-1.72 .004 >145 mEq/L 1.0 1.7 0.9 1.94 1.07-3.31 .02 Preoperative creatinine b ≥1.4 mg/dL 4.4 6.2 4.3 1.45 1.08-1.95 .01 Preoperative WBC b >12000/µL 24.8 33.3 23.5 1.63 1.40-1.89 <.001 Preoperative hematocrit b <36% 11.9 14.3 11.1 1.31 1.07-1.60 .007 Platelets b 100-450 97.5 96.1 97.7 Ref. - - <100 1.3 2.4 1.1 2.12 1.28-3.39 .002 >450 1.2 1.5 1.1 1.33 0.72- 2.30 .33 Median operative time a Minutes (IQR) 179(123-250) 187(130-258) 178(122-197) 1.19 f 1.03-1.37 <.001 No general anesthesia a 5.9 5.2 6.0 0.85 0.62-1.14 .30 Abbreviations: ASA=American Society of Anesthesiologists, BMI: Body Mass Index; CHF: Chronic Heart Failure; CI=Confidence Interval; DM=diabetes mellitus; IQR=interquartile range; OR=odds ratio; p=p-value; µL=Micro-Liter; SD=Standard Deviation; WBC=white blood cell count For all tests, p<.0015 was considered significant. a Independent variable with <1% missing data. b Independent variable with 1-10% missing data. c Independent variable with >10% missing data. d Inflated β-coefficients to odds ratio per 10 years increase. e Inflated β-coefficients to odds ratio per 5 kg/m 2 increase. f Inflated β-coefficients to odds ratio per 60 minutes increase