We evaluated the risk for CDI development according to major antibiotic classes by analyzing data from RCTs.
Only a minority of the selected RCTs (79/1332; 5.9%) reported CDI episodes.
Carbapenems were associated with more CDIs than fluoroquinolones and cephalosporins.
Cephalosporins were associated with more CDIs than penicillins and fluoroquinolones.
Clindamycin was associated with more CDIs than cephalosporins and penicillins.