Post Hoc Analysis for the Primary Outcome
infection
REGRESSION, INFECTION, DIABETES MELLITUS
Data were fitted into a binary logistic regression model to adjust for covariates (ie, potential confounders) that were imbalanced after randomization (diabetes mellitus, indwelling catheter, or intermittent catheterization). Similar to the original analysis, stratification for hospital was applied. Post hoc logistic regression showed a significantly reduced risk of infection within 7 days after biopsy with the use of culture-based prophylaxis (odds ratio, 0.52; 95% CI: .267–.993) (for comparison: unadjusted odds ratio, 0.58; 95% CI: .308–1.101).