Economic burden of primary compared with recurrent Clostridium difficile infection in hospitalized patients: a prospective cohort study.

Summary Background Few studies have investigated the additional healthcare costs of recurrent C. difficile infection (CDI). Aim To quantify inpatient treatment costs for CDI and length of stay among hospitalized patients with primary CDI only, compared with CDI patients who experienced recurrent CDI. Methods This was a prospective, observational cohort study of hospitalized adult patients with primary CDI followed for three months to assess for recurrent CDI episodes. Total and CDI-attributable hospital length of stay (LOS) and hospitalization costs were compared among patients who did or did not experience at least one recurrent CDI episode. Findings In all, 540 hospitalized patients aged 62±17 years (42% males) with primary CDI were enrolled, of whom 95 patients (18%) experienced 101 recurrent CDI episodes. CDI-attributable median (interquartile range) LOS and costs (in US$) increased from 7 (4–13) days and $13,168 (7,525–24,456) for patients with primary CDI only versus 15 (8–25) days and $28,218 (15,050–47,030) for patients with recurrent CDI ( P P N =445) and $140 (30–260) for patients with recurrent CDI ( P =0.0013). Conclusion This study demonstrated that patients with CDI experience a significant healthcare economic burden attributed to CDI. Economic costs and healthcare burden increased significantly for patients with recurrent CDI.