A Review of Systematic Reviews: Gatekeeper Training for Suicide Prevention with a Focus on Effectiveness and Findings.

Evidence supports the immediate effects of GKT but highlights a need for more high-quality RCTs, particularly for Indigenous and e-learning GKT. This review identified a concerning lack of long-term follow-up assessments at multiple time points, which could capture behavioral change and a significant gap in studies focused on post-training interventions that maintain GKT effects over time.