Association of support group leader experience with Scleroderma Patient-centered Intervention Network Support group Leader EDucation Program outcomes: Secondary analysis of a two-arm parallel partially nested randomized controlled trial.

Introduction/objective: The Scleroderma Patient-centered Intervention Network Support group Leader EDucation Program was found in a randomized controlled trial to substantially improve leader self-efficacy. Whether the program is effective for leaders with different levels of experience, including candidate leaders with no prior experience and leaders with ⩽3 years experience or ⩾4 years experience, is not known. The objective of the present post hoc secondary analysis was to evaluate outcomes by leader experience, age, and education.

Methods: The trial was a pragmatic, two-arm partially nested randomized controlled trial with 1:1 allocation to intervention or waitlist control. Eligible participants were existing or candidate support group leaders. The 13-session leader training was delivered in groups of five to six participants weekly via videoconference in 60- to 90-min sessions. The primary outcome was leader self-efficacy, measured by the Support Group Leader Self-efficacy Scale (SGLSS) immediately post-intervention. Secondary outcomes were Support Group Leader Self-efficacy Scale scores 3 months post-intervention and emotional distress, leader burnout, and volunteer satisfaction post-intervention and 3 months post-intervention. Leaders were classified as having no experience, ⩽3 years experience, or ⩾4 years experience.

Results: A total of 148 participants were randomized to intervention (N = 74) or waitlist (N = 74). Compared to leaders with ⩾4 years of experience, Support Group Leader Self-efficacy Scale scores were non-statistically significantly higher post-intervention for leaders with 0-3 years experience and lower for leaders with no experience. The 3 months post-intervention Support Group Leader Self-efficacy Scale scores were significantly lower for leaders without experience and similar for leaders with 0-3 years to those with ⩾4 years experience. There were no differences by experience on other outcomes or by age and education on any outcomes.

Conclusion: Support group leader education improved leader self-efficacy but was most effective for leaders with experience prior to initiating the program.

Trial registration: NCT03965780; registered on May 29, 2019.