Evaluation of Targeted Pharmacist Interventions to Reduce Length of Stay in an Acute Care Practice Model

Background: Despite widespread recognition of the need for innovative pharmacy practice approaches, the development and implementation of value-based outcomes remains difficult to achieve. Furthermore, gaps in the literature persist because the majority of available literature is retrospective in nature and describes only the clinical impact of pharmacists’ interventions. Objective: Length of stay (LOS) is a clinical outcome metric used to represent efficiency in health care. The objective of this study was to evaluate the impact of pharmacist-driven interventions on LOS in the acute care setting. Methods: A separate samples pretest-posttest design was utilized to compare the effect of pharmacist interventions across 3 practice areas (medicine, hematology/oncology, and pediatrics). Two time periods were evaluated: preimplementation (PRE) and a pilot period, postimplementation of interventions (POST). Interventions included targeted discharge services, such as discharge prescription writing (with provider cosignature). Participating pharmacists completed semistructured interviews following the pilot. Results: A total of 924 patients (466 PRE and 458 POST) were included in the analysis. The median LOS decreased from 4.95 (interquartile range = 3.24-8.5) to 4.12 (2.21-7.96) days from the PRE versus POST groups, respectively ( P < 0.011). There was no difference in readmission rates between groups (21% vs 19.1%, P = 0.7). Interviews revealed several themes, including positive impact on professional development. Conclusion and Relevance: This pilot study demonstrated the ability of pharmacist interventions to reduce LOS. Pharmacists identified time as the primary barrier and acknowledged the importance of leaders prioritizing pharmacists’ responsibilities. This study is novel in targeting LOS, providing a value-based outcome for clinical pharmacy services.