13.

Meta‐regression by effect modifiers for 34 microbial outcomes 12 months' postintervention from 26 ITS studies. The bars show the results for unadjusted versus adjusted analyses, the comparison for unplanned interventions is with planned interventions in both the unadjusted and adjusted analysis.

CDI: Clostridium difficile infection
 GPC: infection with antibiotic‐resistant gram‐positive cocci
 GNB: infection with antibiotic‐resistant gram‐negative bacteria

Other infection control: 'Yes' means there were changes to infection control processes during the study period.