The LifeTrack Project: Understanding transitions between suicidal thoughts, suicidal behaviour, and remission from suicidality in an Australian community sample.

LifeTrack is a quantitative observational cohort study of people who have recently experienced suicidal thoughts. The project aims to identify key risk and protective factors predicting the transition from suicidal ideation to suicide attempt and remission from suicidal ideation. It also aims to identify (a) distinct trajectories of suicidal ideation severity and the predictors of these trajectories and (b) subgroups most at risk of suicide attempts. Australian resident adults who have recently experienced suicidal thoughts will complete a total of seven main surveys over three years (baseline and then every six months for three years). The surveys will measure constructs identified by three theoretical models of suicidality: the Interpersonal-Psychological Theory of Suicidal Behaviour, the Three-Step Theory, and Integrated Motivational-Volitional Theory. After three of the main surveys (baseline, 12-month, and-24 month), participants will complete additional brief surveys each day for a week to measure short-term variability in key constructs (suicidal ideation, perceived burdensomeness, thwarted belongingness, acquired capability for suicide, and distress) .