Sensitivity analysis
Because WBC counts were missing in nearly 12% of patient records, we
repeated the univariate and multivariate analysis to include only those
patients with WBC counts and ASA Class available. While the demographic
analysis demonstrated small differences in gender distribution,
perforation rate and cardiac risk factors between the cancer and
non-cancer patients that were not seen in the larger cohort, odds of
wound complications – either in aggregate or individually – did not
change in the sensitivity analysis (Supplemental Tables 1 and 2).