Statistical Analysis and Stop-Go Criteria

Risks & contraindications

Evidence quality

Highlighted claims

• The study is not powered to detect efficacy. — Program LIFT: protocol for a pilot feasibility factorial randomised controlled trial of digital single-session interventions to address self-harm and suicidal ideation in Australian community-based adolescents
• D-SSI feasibility is defined as at least an 85% completion rate. — Program LIFT: protocol for a pilot feasibility factorial randomised controlled trial of digital single-session interventions to address self-harm and suicidal ideation in Australian community-based adolescents
• The full RCT proceeds if at least three of five predefined criteria are met. — Program LIFT: protocol for a pilot feasibility factorial randomised controlled trial of digital single-session interventions to address self-harm and suicidal ideation in Australian community-based adolescents
• Failure to meet the stop-go threshold means the study will not proceed to a full trial. — Program LIFT: protocol for a pilot feasibility factorial randomised controlled trial of digital single-session interventions to address self-harm and suicidal ideation in Australian community-based adolescents
• The minimum total sample size is 216 participants, based on 54 participants per arm after allowing for 25% attrition. — Program LIFT: protocol for a pilot feasibility factorial randomised controlled trial of digital single-session interventions to address self-harm and suicidal ideation in Australian community-based adolescents
• Post-intervention skill-use protocol feasibility is defined as 60% adherence. — Program LIFT: protocol for a pilot feasibility factorial randomised controlled trial of digital single-session interventions to address self-harm and suicidal ideation in Australian community-based adolescents