Meeting the Challenges of Longitudinal Cluster-Based Trials in Schools: Lessons From the Chicago Trial of Positive Action
Kendra M Lewis, Joseph Day, David L DuBois, Naida Silverthorn, Peter Ji, Niloofar Bavarian, Joseph Day, Samuel Vuchinich, Naida Silverthorn, Alan Acock, Niloofar Bavarian, Margaret Malloy, Samuel Vuchinich, Marc Schure, Brian R Flay
Evaluation & the Health Professions
We describe challenges in the 6-year longitudinal cluster randomized controlled trial (CRCT) of Positive Action (PA), a social-emotional and character development (SECD) program, conducted in 14 low-income, urban Chicago Public Schools. Challenges pertained to logistics of study planning (school recruitment, retention of schools during the trial, consent rates, assessment of student outcomes, and confidentiality), study design (randomization of a small number of schools), fidelity (implementation of PA and control condition activities), and evaluation (restricted range of outcomes, measurement invariance, statistical power, student mobility, and moderators of program effects). Strategies used to address the challenges within each of these areas are discussed. Incorporation of lessons learned from this study may help to improve future evaluations of longitudinal CRCTs, especially those that involve evaluation of school-based interventions for minority populations and urban areas. © The Author(s) 2016.
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