Fig. 2.
Subgroup analysis for peripheral catheter–related infections. Subgroup analysis after 1:1 propensity score matching for peripheral catheters. The number needed to treat (NNT) is the estimated number of patients who would have to be given single-dose antibiotic prophylaxis to avoid one catheter-related infection. Odds ratios (ORs) and 95% confidence intervals (CIs) were adjusted for surgical specialty, catheter site, year of surgery, and hospital center. ASA score = American Society of Anesthesiologists physical status score.