Predictors of the sustainability for an evidence-based eating disorder prevention program delivered by college peer educators.

Background: Despite ongoing efforts to introduce evidence-based interventions (EBIs) into mental health care settings, little research has focused on the sustainability of EBIs in these settings. College campuses are a natural place to intervene with young adults who are at high risk for mental health disorders, including eating disorders. The current study tested the effect of three levels of implementation support on the sustainability of an evidence-based group eating disorder prevention program, the Body Project, delivered by peer educators. We also tested whether intervention, contextual, or implementation process factors predicted sustainability.

Methods: We recruited 63 colleges with peer educator programs and randomly assigned them to (a) receive a 2-day Train-the-Trainer (TTT) training in which peer educators were trained to implement the Body Project and supervisors were taught how to train future peer educators (TTT), (b) TTT training plus a technical assistance (TA) workshop (TTT + TA), or (c) TTT plus the TA workshop and quality assurance (QA) consultations over 1-year (TTT + TA + QA). We tested whether implementation support strategies, perceived characteristics of the intervention and attitudes towards evidence-based interventions at baseline and the proportion of completed implementation activities during the implementation year predicted three school-level dichotomous sustainability outcomes (offering Body Project groups, training peer educators, training supervisors) over the subsequent two-year sustainability period using logistic regression models.

Results: Implementation support strategies did not significantly predict any sustainability outcomes, although a trend suggested that colleges randomized to the TTT + TA + QA strategy were more likely to train new supervisors (OR = 5.46, 95% CI [0.89-33.38]). Colleges that completed a greater proportion of implementation activities were more likely to offer Body Project groups (OR = 1.53, 95% CI [1.19-1.98]) and train new peer educators during the sustainability phase (OR = 1.39, 95% CI [1.10-1.74]). Perceived positive characteristics of the Body Project predicted training new peer educators (OR = 18.42, 95% CI [1.48-299.66]), which may be critical for sustainability in routine settings with high provider turnover.

Conclusions: Helping schools complete more implementation activities and increasing the perceived positive characteristics of a prevention program may result in greater sustainment of prevention program implementation.

Trial registration: This study was preregistered on 12/07/17 with ClinicalTrials.gov, ID NCT03409809, https://clinicaltrials.gov/ct2/show/NCT03409809 .