Police and clinician diversion of people in mental health crisis from the Emergency Department: a trend analysis and cross comparison study

Background: The Northern Police and Clinician Emergency Response (NPACER), a combined police and clinician second response team, was created to divert people in mental health crisis away from the hospital emergency department (ED) to care in the community or direct admission to acute inpatient services. The aim of this study was to evaluate the NPACER by comparing trends in service utilisation prior to and following its inception. Methods: A retrospective comparison of electronic records was undertaken with interrupted time series analysis to assess the impact of NPACER on ED presentations over 27-months (N = 1776). Chi-squared tests were used to analyze service utilization; (1) in the six-months before and after the implementation of NPACER and (2) within the post NPACER period between times of the day it was operational. Results: NPACER reduced the number of mental health crisis presentations to the ED. When the NPACER team was operational, 16 % of people in crisis went to ED compared with 100 % for all other times of the day, over a sixmonth period. The NPACER team enabled direct access to the inpatient unit for 51 people assessed at a police station and in the community compared with no direct access when NPACER was not operational. Conclusions: NPACER enabled reductions in presentations to the ED by diverting people to more appropriate and less restrictive environments. The model also facilitated direct admission to acute inpatient mental health services when people in crisis were assessed in the community or transported to a police station for assessment.