• Brent C Opmeer, William Hollingworth, Marques Elsa M R EMR School of Clinical Sciences, University of Bristol, Bristol, UK., Ruta Margelyte, and David Gunnell.
• The National Institute for Health Research Collaboration for Leadership in Applied Health Research and Care (CLAHRC) West at University Hospitals Bristol, Bristol, UK.
• BMJ Open. 2017 Aug 21; 7 (8): e016906.

ObjectivesTo evaluate the impact of an expansion of liaison psychiatry services (LPS) on patient management, outcomes and treatment costs for emergency department (ED) attendances for self-harm.DesignRetrospective before and after cohort study using routinely collected Self-Harm Surveillance Register data.SettingA large hospital in South West England.SubjectsPatients attending the ED for self-harm.InterventionsExtension of the LPS' working hours from 9:00 to 17:00, Monday to Friday to 8:00 to 22:00, 7 days a week, following a £250 000 annual investment MAIN OUTCOME MEASURES: Number and characteristics of ED attendances for self-harm. The before and after cohorts were compared in terms of key process measures, including proportion of patients receiving a psychosocial assessment, average length of hospital stay, waiting times for assessment, proportion of patients who self-discharged without an assessment, levels of repeat self-harm attendances and mean cost per patient attendance.Results298 patients attended ED for self-harm on 373 occasions between January and March 2014, and 318 patients attended on 381 occasions between January and March 2015. The proportion of ED attendances where patients received a psychosocial assessment increased from 57% to 68% (p=0.003), median waiting time decreased by 3 hours and 14 min (p=0.017), and the proportion of episodes where patients self-discharged without a psychosocial assessment decreased from 20% to 13% (p=0.022). The mean cost per patient attendance was marginally lower after the intervention (-£84; 95% CI -£254 to £77).ConclusionsThe extended LPS seems to have had a favourable effect on the management and outcomes of self-harm patients. The cost of extending the LPS' working hours might be partially offset by more efficient assessment and discharge. The impact of the extended LPS on the care of hospitalised patients with mental health problems other than self-harm requires further evaluation.© Article author(s) (or their employer(s) unless otherwise stated in the text of the article) 2017. All rights reserved. No commercial use is permitted unless otherwise expressly granted.

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