Joeky Senders

34 Chapter 2 TABLE 3. Multivariable logistic regression identifying predictors of a major complication and extended length of stay Predictor Definition Major Complication Hospital Stay >10 days OR 95% CI p OR 95% CI p Age Per 10 years increase 1.09 a 1.04-1.15 <.001 1.12 a 1.07-1.17 <.001 Gender Female Ref. - - Ref. - - Male 1.05 0.90-1.22 .52 0.96 0.84-1.10 .56 BMI Per 5 Kg/m 2 increase 1.11 b 1.05-1.17 <.001 - - - ASA-classification I-II Ref. - - Ref. - - III 1.59 1.30-1.94 <.001 2.09 1.73-2.55 <.001 IV-V 2.42 1.90-3.13 <.001 3.46 2.74-4.39 <.001 Functional status Independent Ref. - - Ref. - - Dependent 2.09 1.60-2.71 <.001 2.48 1.96-3.13 <.001 WBC count ≤12,000/µL Ref. - - Ref. - - >12,000/µL 1.52 1.29-1.78 <.001 1.59 1.38-1.84 <.001 Hematocrit ≥36% - - - Ref. - - <36% - - - 1.53 1.26-1.84 <.001 Ventilator dependence No - - - Ref. - - Yes - - - 3.77 2.23-6.40 <.001 Operative time Per 60 minutes increase 1.13 c 1.09-1.17 <.001 - - - Model fit AUC 0.64 0.62-0.66 <.001 0.68 0.66-0.70 <.001 ASA=American Society of Anesthesiologists, AUC: Area under the curve; BMI=Body Mass Index, CI=confidence interval; p=p-value; OR=odds ratio; WBC=white blood cell; For all tests, p<.0015 was considered significant. a Inflated β-coefficients to odds ratio per 10 years increase. b Inflated β-coefficients to odds ratio per 5 kg/m 2 increase. c Inflated β-coefficients to odds ratio per 60 minutes increase.