Figure 1.
Hospital-wide rate of primary healthcare-associated Clostridioides difficile (HA-CDI) cases (A) and recurrent CDI episodes (B) per 10 000 patient-days (pt-days) for each semiannual period. The semiannual periods refer to hospital data from the spring through summer [Periods 1-7] or from the autumn through winter [Periods 8-13]. Error bars for simple proportion represent 95% confidence intervals calculated with Fisher exact test. *P < .01 for hospital-wide rate of primary HA-CDI cases versus 1 year earlier; †P < .01 for hospital-wide rate of primary HA-CDI cases versus 1 and 2 years earlier; ‡P < .01 for hospital-wide rate of first recurrent HA-CDI cases versus 1 and 2 years earlier.