In this systematic review, we included all studies that had used primary, evidence-based data to evaluate PVE programs and that had been published in English, French, or Spanish from 2001 through 2019. To select the studies for this review, we first conducted keyword searches in 21 scientific databases and on 228 websites of organizations that work in this field. Next, to eliminate any studies that did not meet our eligibility criteria, we screened the title and abstract of each of the studies identified in these searches. Each study was reviewed by two members of the research team. To ensure that there was sufficient agreement between them at this first screening stage, a Cohen’s kappa coefficient was calculated, with a very positive result (kappa = 0.86). The studies that passed this first eligibility screening were then reviewed in depth in a second screening to confirm whether they met all of the eligibility criteria. Lastly, we used a specialized tool to assess the methodological quality of all of the studies that had passed this second screening. and been included in this review.