RT Journal Article SR Electronic T1 Innovations in suicide prevention research (INSPIRE): a protocol for a population-based case–control study JF Injury Prevention JO Inj Prev FD BMJ Publishing Group Ltd SP injuryprev-2022-044609 DO 10.1136/injuryprev-2022-044609 A1 Shabbar I Ranapurwala A1 Vanessa E Miller A1 Timothy S Carey A1 Bradley N Gaynes A1 Alexander P Keil A1 Kate Vinita Fitch A1 Monica E Swilley-Martinez A1 Andrew L Kavee A1 Toska Cooper A1 Samantha Dorris A1 David B Goldston A1 Lewis J Peiper A1 Brian W Pence YR 2022 UL http://injuryprevention.bmj.com/content/early/2022/06/23/injuryprev-2022-044609.abstract AB Background Suicide deaths have been increasing for the past 20 years in the USA resulting in 45 979 deaths in 2020, a 29% increase since 1999. Lack of data linkage between entities with potential to implement large suicide prevention initiatives (health insurers, health institutions and corrections) is a barrier to developing an integrated framework for suicide prevention.Objectives Data linkage between death records and several large administrative datasets to (1) estimate associations between risk factors and suicide outcomes, (2) develop predictive algorithms and (3) establish long-term data linkage workflow to ensure ongoing suicide surveillance.Methods We will combine six data sources from North Carolina, the 10th most populous state in the USA, from 2006 onward, including death certificate records, violent deaths reporting system, large private health insurance claims data, Medicaid claims data, University of North Carolina electronic health records and data on justice involved individuals released from incarceration. We will determine the incidence of death from suicide, suicide attempts and ideation in the four subpopulations to establish benchmarks. We will use a nested case–control design with incidence density-matched population-based controls to (1) identify short-term and long-term risk factors associated with suicide attempts and mortality and (2) develop machine learning-based predictive algorithms to identify individuals at risk of suicide deaths.Discussion We will address gaps from prior studies by establishing an in-depth linked suicide surveillance system integrating multiple large, comprehensive databases that permit establishment of benchmarks, identification of predictors, evaluation of prevention efforts and establishment of long-term surveillance workflow protocols.Data may be obtained from a third party and are not publicly available. The data used in this study are not publicly available but can be obtained upon request from the entities noted under the 'Data sets and linkage' section in the Methods section of this manuscript.