FQ Restriction for the Prevention of CDI

This study evaluates the effectiveness of a new intervention, fluoroquinolone (FQ) Preprescription Authorization (PPA) strategy, to reduce and prevent Clostridium difficile infection (CDI) in hospital intensive care units (ICUs). The investigators will model a successful FQ PPA strategy in several Wisconsin ICUs and compare whether the intervention has improved outcomes in reducing CDIs. An additional goal of the study is to evaluate environmental and work system factors using systems engineering models in order to determine the most successful way to implement these new strategies.