Fig 2. Increase in ARB acquisitions relative to no antibiotic use as antibiotic density increases.

The ARB prevalence on admission is 1%, and antibiotic impact is V = 2, C = 2. With no antibiotic use, the number of ARB acquisitions per 100,000 patient-days is 20 for ARB-L and 115 for ARB-H. The % increase in incidence (y axis) refers to these baseline rates.