This is an American study analysing admissions data of 160,169 patients admitted between 2009 and 2011 with a diagnosis of HF, AMI, or pneumonia.  Approximately 18% of all individuals with hospitalizations for HF, AMI, and pneumonia were readmitted within 30 days. The rate of readmission was 5% greater for individuals with psychiatric comorbidity compared with those without (21.7% and 16.5%, respectively, p<.001). Depression, anxiety, and dementia were associated with more readmissions 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.
1 Ahmedani BK, Solberg LI, Copeland LA, et al. Psychiatric Comorbidity and 30-Day Readmissions After Hospitalization for Heart Failure, AMI, and Pneumonia. Psychiatr Serv 2015;66:134–40. doi:10.1176/appi.ps.201300518