2377. Social Determinants Impact Readmission Following Clostridioides difficile-Related Index Hospital Stay in Medicare Patients

BACKGROUND: Clostridioides difficile infection (CDI) is the leading cause of healthcare-associated diarrhea and recurs in up to 30% of patients, often requiring readmission. Socioeconomic factors, such as living in a disadvantaged neighborhood may impact readmission but have not been studied. METHODS: We examined the relationship between neighborhood disadvantage, as measured by the Singh validated area deprivation index (ADI), and 30-day all-cause readmission risk in patients with an index hospital stay with CDI. We analyzed a random 20% sample of national Medicare claims for patients’ initial index hospitalization with a CDI diagnosis in 2014 (n = 19,528) that included each patient’s neighborhood ADI national percentile. The most disadvantaged neighborhoods were categorized as those in the upper 35 percentile, while the least disadvantaged was defined as those in the bottom 65% of national ADI rankings. We evaluated the relationship between ADI percentile and 30-day readmission risk using multivariate logistic regression, controlling for key patient demographics, comorbidities, and hospital/stay characteristics. RESULTS: A total of 19,528 patients had an index stay with CDI, 4,899 were readmitted within 30 days. Patients from the most disadvantaged neighborhoods had a higher average rate of readmission compared with those living in the least disadvantaged neighborhoods (28% vs. 24% rate; unadjusted risk ratio = 1.16 [1.10, 1.21]). This relationship held after controlling for confounders. After adjustment, being a resident in the most disadvantaged neighborhoods was associated with a 10% increased risk of readmission (adjusted risk ratio = 1.10 [1.05, 1.16]), which was similar to the effect sizes associated with dual Medicaid-Medicare enrollment status (adjusted risk ratio = 1.09 [1.03, 1.15]) and renal failure (adjusted risk ratio = 1.14 [1.08, 1.21]). CONCLUSION: Living in a disadvantaged neighborhood is associated with an increased 30-day readmission risk similar in magnitude to Medicaid status and renal failure in patients with index hospitalizations of CDI. Future studies should examine whether interventions such as post discharge support and care coordination for patients in disadvantaged neighborhoods may reduce readmissions in this patient population. DISCLOSURES: All authors: No reported disclosures.