• Brian K Ahmedani, Leif I Solberg, Laurel A Copeland, Ying Fang-Hollingsworth, Christine Stewart, Jianhui Hu, David R Nerenz, L Keoki Williams, Andrea E Cassidy-Bushrow, Jeanette Waxmonsky, Christine Y Lu, Beth E Waitzfelder, Ashli A Owen-Smith, Karen J Coleman, Frances L Lynch, Ameena T Ahmed, Arne Beck, Rebecca C Rossom, and Gregory E Simon.
• Dr. Ahmedani, Dr. Hu, Dr. Nerenz, and Dr. Williams are with the Center for Health Policy and Health Services Research, Henry Ford Health System, Detroit, Michigan (e-mail: bahmeda1@hfhs.org ). Dr. Solberg and Dr. Rossom are with the Institute for Education and Research, HealthPartners, Bloomington, Minnesota. Dr. Copeland and Ms. Fang-Hollingsworth are with the Center for Applied Health Research, Baylor Scott & White Health, Temple, Texas. Dr. Stewart and Dr. Simon are with the Group Health Research Institute, Group Health Cooperative, Seattle, Washington. Dr. Cassidy-Bushrow is with Public Health Sciences, Henry Ford Health System, Detroit. Dr. Waxmonsky is with the Department of Psychiatry, University of Colorado School of Medicine, Denver. Dr. Lu is with Harvard Pilgrim Health Care, Wellesley, Massachusetts, and the Department of Population Medicine, Harvard Medical School, Boston. Dr. Waitzfelder is with the Center for Health Research, Kaiser Permanente Hawaii, Honolulu. Dr. Owen-Smith is with the Center for Health Research, Kaiser Permanente Georgia, Atlanta. Dr. Coleman is with the Department of Research and Evaluation, Kaiser Permanente Southern California, Pasadena. Dr. Lynch is with the Center for Health Research, Kaiser Permanente Northwest, Portland, Oregon. Dr. Ahmed is with the Department of Research, Kaiser Permanente Northern California, Oakland. Dr. Beck is with the Institute for Health Research, Kaiser Permanente of Colorado, Denver.
• Psychiatr Serv. 2015 Feb 1;66(2):134-40.

ObjectiveIn 2012, the Centers for Medicare and Medicaid Services implemented a policy that penalizes hospitals for "excessive" all-cause hospital readmissions within 30 days after discharge from an index hospitalization for heart failure (HF), acute myocardial infarction (AMI), and pneumonia. The aim of this study was to investigate the influence of psychiatric comorbidities on 30-day all-cause readmissions following hospitalizations for HF, AMI, and pneumonia.MethodsData from 2009-2011 were derived from the HMO Research Network Virtual Data Warehouse of 11 health systems affiliated with the Mental Health Research Network. All index inpatient hospitalizations for HF, AMI, and pneumonia were captured (N=160,169). Psychiatric diagnoses for the year prior to admission were measured. All-cause readmissions within 30 days of discharge were the outcome variable.ResultsApproximately 18% of all individuals with index inpatient hospitalizations for HF, AMI, and pneumonia were readmitted within 30 days. The rate of readmission was 5% greater for individuals with a psychiatric comorbidity compared with those without a psychiatric comorbidity (21.7% and 16.5%, respectively, p<.001). Depression, anxiety, and dementia were associated with more readmissions of persons with index hospitalizations for each general medical condition and for all the conditions combined (p<.05). Substance use and bipolar disorders were linked with higher readmissions for those with initial hospitalizations for HF and pneumonia (p<.05). Readmission rates declined overall from 2009 to 2011.ConclusionsIndividuals with HF, AMI, and pneumonia experience high rates of readmission, but psychiatric comorbidities appear to increase that risk. Future interventions to reduce readmission should consider adding mental health components.

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