Purpose
The objective of this study was to quantify the rate at which newly-initiated antipsychotic therapy is continued on discharge from the Intensive Care Unit and describe risk factors for continuation post ICU discharge.
Materials and Methods
Retrospective cohort study of all patients receiving an antipsychotic in the Intensive Care Units of a large academic medical center from January 1, 2005, to October 31, 2011. Chart review was conducted to ascertain whether a patient was newly-started on antipsychotic therapy and whether therapy was continued post ICU discharge.
Results
A total of 39,248 ICU admissions over the 7 year period were evaluated. Of these, 4468 (11%) were exposed to antipsychotic therapy, of which 3119 (8%) were newly-initiated. In the newly-initiated cohort, 642 (21%) were continued on therapy on discharge from the hospital. Type of drug (use of quetiapine versus no use of quetiapine, odds ratio 3.2, 95% CI 2.5–4.0, p<0.0001 and use of olanzapine OR 2.4, 95% CI 2.0–3.1 p=<0.0001) were significant risk factors for continuing antipsychotics on discharge, despite adjustment for clinical factors.
Conclusions
Antipsychotic use is common in the intensive care unit setting, and a significant number of newly-initiated patients have therapy continued upon discharge from the hospital.