This article reviews the literature for evidence regarding outcomes for severely mentally ill patients hospitalized in general hospitals for non-psychiatric conditions.  The study concluded that nurses play a pivotal role with the mentally ill population but struggle to do so.  The authors suggest research to determine the best methods for promoting knowledge, positive attitudes and self-confidence in caring for patients with psychiatric co-morbidity among nurses.  

Zolnierek, C. D. (2009). Non-psychiatric hospitalization of people with mental illness: systematic review. Journal of Advanced Nursing, 65(8): 1570-1583. http://www.ncbi.nlm.nih.gov/pubmed/19493137