Comments on the Use of Alternative Designs in Dissemination Research

In the current issue of the American Journal of Preventive Medicine, Drs. Goode, Reeves, and Eakin provide a strong review of the rapidly growing literature on telephone-based intervention strategies for the modification of dietary and physical activity behavior. As noted by the authors, telephone-based interventions have demonstrated consistent success at producing changes in diet and physical activity, as evidenced primarily by efficacy studies where the interventions were evaluated under conditions controlled by the investigators