“Weekend Effect” on 30-Day Readmissions among Stroke Survivors: An Analysis of the National Readmission Database

BACKGROUND AND PURPOSE: Previous studies suggested that quality of care may be lower on weekends than during the week. We hypothesized that, among patients hospitalized for an index ischemic stroke, those admitted on weekends would have a higher risk of 30-day readmission than those admitted on weekdays. METHODS: We utilized the 2013 Nationwide Readmission Database, which includes data on US inpatient admissions from the Agency for Healthcare Research and Quality Healthcare Utilization Project. The database includes a nationally representative weighted probability sample of inpatient hospitalizations regardless of insurance status. Patients with primary acute ischemic stroke were identified using previously validated ICD-9-CM diagnosis codes. We conducted a weighted analysis using survey design logistic regression models to estimate crude and adjusted odds ratios (OR) and 95% confidence intervals (95% CI) for the association between weekend admission and 30-day readmission in ischemic stroke patients. RESULTS: Among 319,317 patients admitted for ischemic stroke, 12.1% were readmitted within 30 days. Those with 30-day readmissions had an average of 8 chronic conditions, and all cardiovascular-related comorbidities increased the risk of 30-day readmissions. Ischemic stroke patients admitted on weekends had odds of 30-day readmission similar to patients admitted on weekdays (OR 1.02; 95% CI 0.98–1.06). Weekend admission also did not affect readmission at 7 or 60 days. CONCLUSIONS: We found no association between weekend admission and 30-day readmissions, providing indirect evidence of homogeneity in the quality of care delivered during week day and weekend admissions.