RT Journal Article SR Electronic T1 Non-fatal self-inflicted versus undetermined intent injuries: patient characteristics and incidence of subsequent self-inflicted injuries JF Injury Prevention JO Inj Prev FD BMJ Publishing Group Ltd SP 521 OP 528 DO 10.1136/injuryprev-2018-042933 VO 25 IS 6 A1 Cora Peterson A1 Likang Xu A1 Ruth W Leemis A1 Deborah M Stone A1 Michael F Ballesteros YR 2019 UL http://injuryprevention.bmj.com/content/25/6/521.abstract AB Background Non-fatal self-inflicted (SI) injuries may be underidentified in administrative medical data sources.Objective Compare patients with SI versus undetermined intent (UI) injuries according to patient characteristics, incidence of subsequent SI injury and risk factors for subsequent SI injury.Methods Truven Health MarketScan was used to identify patients’ (aged 10–64) first SI or UI injury in 2015 (index injury). Patient characteristics and subsequent SI within 1 year were assessed. A logistic regression model examined factors associated with subsequent SI.Results Among analysed patients (n=44 806; 36% SI, 64% UI), a higher proportion of patients with SI index injury were female, had preceding comorbidities (eg, depression), Medicaid (vs commercial insurance), treatment in an ambulance or hospital and cut/pierce or poisoning injuries compared with patients with UI index injury. Just 1% of patients with UI had subsequent SI≤1 year vs 16% of patients with SI. Among patients with UI index injury, incidence of and risk factors for subsequent SI injury were similar across assessed age groups (10–24 years, 25–44 years, 45–64 years). Severe injuries (eg, treated in emergency department), cut/pierce or poisoning injuries, mental health and substance use disorder comorbidities and Medicaid (among adult patients) were risk factors for subsequent SI among patients with UI index injuries.Conclusions Regardless of circumstances that influence clinicians’ SI vs UI coding decisions, information on incidence of and risk factors for subsequent SI can help to inform clinical treatment decisions when SI injury is suspected as well as provide evidence to support the development and implementation of self-harm prevention activities.