Abstract
Introduction: While advances in the management of sickle cell disease (SCD) treatment have improved outcomes, readmission rates among patients remain a significant concern. A previous study with the National Readmission Database (NRD) 2016 found that alcohol use, tobacco use, opoid use ,substance use and depression were associated with SCD readmission even though the general rate of readmission has decreased over the years. This study aims to update the literature, and further determine the predictors associated with increased readmission among individuals with SCD. Methods: Using the Nationwide Readmissions Database (NRD), we evaluated readmissions for SCD for the year 2016-2020. On the basis of International Classification of Diseases, TenthRevision, Clinical Modification (ICD-10-CM) codes, we identified SCD hospitalizations (D57.0, D57.1, D57.2, D57.4, D57.8), and comorbid conditions. Usingamultivariateregressionanalysis,weestimatedtheindependent predictors of 30-day readmissions of SCD. We used STATA® Version 18.0 Software (STATACORP, TEXAS, USA) for analysis. The p-value was set at p < 0.05 for statistical significance. Results: A total of 262,571 index admissions for adult patients with a primary diagnosis of SCD were admitted within the study period; 61,687 patients (23.6%) were readmitted within 30 days. A total of 886 and 105 deaths were reported respectively among index admissions and readmissions. Compared to index admissions, readmissions had decreased THC of 2147 U.S. dollars (95%CI: -2678 - -1615), while we found no significant change in the LOS between index admissions and readmissions. Common causes of increased rate of readmissions were SCD with mood disorder (HR=1.15, 95%CI: 1.11-1.20) , anxiety disorder (HR= 1.16, 95%CI: 1.11-1.20) and opioid use (HR=1.42, 95%CI: 1.35-1.50). Conditions associated with lower rates of readmission are Alcohol use disorder (HR 0.76, 95%CI: 0.62-0.94) and cannabis use ( HR=0.94, 95%CI: 0.88-0.99). Discussion: Our findings suggest that among individuals admitted with a primary diagnosis of SCD, having concurrent mood and anxiety disorders, and opioid use disorder increases rates of readmission. Interestingly, we observed that alcohol use disorder and cannabis use was associated with lower rates of readmission in SCD patients. Optimizing the comorbid conditions in patients with SCD may reduce readmission rates. However, further studies are required to establish the relationship between psychiatric comorbidity and healthcare resources utilization among SCD patients.
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