Sydney 'lockout' liquor licensing law restrictions have been associated with a sustained reduction in emergency department presentations from assaults over 5 years.

Objectives: The present study assessed the impact of changes to the New South Wales Liquor Act in 2014 on assault-related presentations to the ED of St Vincent's Hospital. This hospital is the primary receiving hospital for the area affected by these laws.

Methods: Patients presenting to the ED with an assault-related diagnosis were identified from the ED and trauma registry databases from 2009 to 2019 and retrospectively reviewed.