Inappropriate prophylactic antibiotic use: Pre-intervention versus post-intervention.

aThe percentage was calculated by ratio of the number of incorrect cases to the number of total cases that were included in the analysis (171 cases in the pre-intervention group and 193 in the post-intervention group, respectively).bThe calculation range for the percentage only included the number of cases that showed indications for prophylactic antibiotics (88 cases in the pre-intervention group and 80 in the post-intervention group, respectively).cNS = not significant (p>0.05)dThe calculation range for the percentage only included the number of cases that showed indications for prophylactics antibiotic and also received second-generation cephalosporins or aztreonam (74 cases in the pre-intervention group and 78 in the post-intervention group, respectively).