Joeky Senders

54 Chapter 3 TABLE 1. Continued Characteristic (%) Definition Total (n = 7376) No VTE (n = 7119) VTE (n = 257) OR 95% CI p Insulin-dependent DM 3.9 3.8 4.7 1.23 0.65-2.13 0.49 Pre-op steroid usage 16.6 16.4 23.3 1.55 1.15-2.07 0.004 Functional dependence 5.1 5.0 10.4 2.23 1.43-3.32 <0.001 Pre-op SIRS 3.6 3.4 5.1 1.51 0.81-2.56 0.16 Pre-op transfusion 0.2 0.2 0.4 1.85 0.10-9.18 0.55 Pre-op Sodium 135-145 89.9 90.0 87.2 Ref. - - <135 9.1 9.0 10.8 1.24 0.80-1.83 0.31 >145 1.0 1.0 2.0 2.07 0.72-4.69 0.12 Pre-op creatinine ≥ 1.4 mg/dL 4.4 4.6 4.4 0.96 0.49-1.69 0.90 Pre-op WBC >12000/µL 24.8 24.4 33.1 1.53 1.16-1.99 0.002 Pre-op hematocrit <36% 11.9 11.8 12.6 1.07 0.72-1.54 0.71 Platelets 100-450 97.5 97.6 95.7 Ref. - - <100 1.3 1.0 2.8 2.29 0.95-4.65 0.05 >450 1.2 1.2 1.6 1.37 0.41-3.33 0.54 Operative time min [IQR] 179[123-250] 179[123-250] 191[134-252] 1.33 c 1.02-1.74 0.04 No general anesthesia 5.9 5.9 5.4 0.91 0.50-1.52 0.74 Admission to operation ≥2 days 32.8 32.4 46.3 1.80 1.40-2.31 <0.001 Abbreviations: ASA=American Society of Anesthesiologists, CI=confidence interval, CHF=congestive heart failure, p=p-value; pre-op=preoperative; SIRS = systematic inflammatory response syndrome, WBC=white blood cell count. a Inflated β-coefficients to odds ratio per 10 years increase b Inflated β-coefficients to odds ratio per 5 kg/m2 increase c Inflated β-coefficients to odds ratio per 60 minutes increase d Infinity due to 0 count in one of the cells