• Luke O Hansen, Robert S Young, Keiki Hinami, Alicia Leung, and Mark V Williams.
• Northwestern University Feinberg School of Medicine, Chicago, Illinois 60611, USA. l-hansen@northwestern.edu
• Ann. Intern. Med. 2011 Oct 18; 155 (8): 520-8.

BackgroundAbout 1 in 5 Medicare fee-for-service patients discharged from the hospital is rehospitalized within 30 days. Beginning in 2013, hospitals with high risk-standardized readmission rates will be subject to a Medicare reimbursement penalty.PurposeTo describe interventions evaluated in studies aimed at reducing rehospitalization within 30 days of discharge.Data SourcesMEDLINE, EMBASE, Web of Science, and the Cochrane Library were searched for reports published between January 1975 and January 2011.Study SelectionEnglish-language randomized, controlled trials; cohort studies; or noncontrolled before-after studies of interventions to reduce rehospitalization that reported rehospitalization rates within 30 days.Data Extraction2 reviewers independently identified candidate articles from the results of the initial search on the basis of title and abstract. Two 2-physician reviewer teams reviewed the full text of candidate articles to identify interventions and assess study quality.Data Synthesis43 articles were identified, and a taxonomy was developed to categorize interventions into 3 domains that encompassed 12 distinct activities. Predischarge interventions included patient education, medication reconciliation, discharge planning, and scheduling of a follow-up appointment before discharge. Postdischarge interventions included follow-up telephone calls, patient-activated hotlines, timely communication with ambulatory providers, timely ambulatory provider follow-up, and postdischarge home visits. Bridging interventions included transition coaches, physician continuity across the inpatient and outpatient setting, and patient-centered discharge instruction.LimitationsInadequate description of individual studies' interventions precluded meta-analysis of effects. Many studies identified in the review were single-institution assessments of quality improvement activities rather than those with experimental designs. Several common interventions have not been studied outside of multicomponent "discharge bundles."ConclusionNo single intervention implemented alone was regularly associated with reduced risk for 30-day rehospitalization.Primary Funding SourceNone.

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