2370. Risk Factors for Clostridioides difficile Colonization Among Adult Inpatients: A Meta-Analysis

BACKGROUND: Clostridioides difficile is one of the most common causes of healthcare-associated infections in the United States. The prevalence of asymptomatic C. difficile colonization has been demonstrated to range from 3 to 21% for hospitalized adults. Patients colonized with C. difficile may serve as potential reservoirs for transmission of C. difficile infection (CDI) within inpatient units. The purpose of this meta-analysis was to identify the risk factors for colonization at hospital admission among adult patients, to inform strategies for infection prevention. METHODS: We searched MEDLINE, Scopus, Web of Science, and Embase from inception to 2019 for articles related to C. difficile colonization on hospital admission. Studies with multivariate analyses evaluating risk factors for asymptomatic colonization in adult inpatients were eligible. Odds ratios were pooled using a random effects model. Study quality and publication bias analyses were also conducted. RESULTS: Among 2,982 studies identified in the search, 21 studies met the inclusion criteria. Included studies reported 18,468 adult patients of which 1,243 were asymptomatically colonized with C.difficile. Factors associated with an increased risk of colonization were CDI in the last 3 months (OR 4.18, 95% CI 2.56–6.82, I(2) = 0%), hospitalization in the last 6 months (OR 2.45, 95% CI 2.06–2.92, I(2) = 0%) and use of gastric acid suppression therapy within the last 8 weeks (OR 1.46, 95% CI 1.17–1.73, I(2) = 1%). Receipt of antibiotics in the last 3 months (OR 1.37, 95% CI 0.94–2.01, I(2) = 48%) and use of non-steroidal anti-inflammatory drugs (OR 0.90, 95% CI 0.52–1.55, I(2) = 65%) were not associated with statistically significant effects on risk of colonization. There were insufficient studies to determine the association between most antibiotic classes and the risk of colonization. CONCLUSION: C.difficile colonization on hospital admission was significantly associated with previous CDI, recent hospitalization, and gastric acid suppression therapy. Recognition of these risk factors may assist in identifying potential carriers of C. difficile. These findings also emphasize the importance of judicious use of gastric acid suppression and other preventative measures in reducing C. difficile acquisition. [Image: see text] [Image: see text] [Image: see text] DISCLOSURES: All authors: No reported disclosures.