Rationale and design for a pragmatic effectiveness-implementation trial of online behavioral obesity treatment in primary care.


Weight Control and Diabetes Research Center, The Miriam Hospital, 196 Richmond St., Providence, RI 02903, USA; Department of Psychiatry and Human Behavior, Alpert Medical School of Brown University, 222 Richmond St., Providence, RI 02903, USA. Electronic address: [Email]


Current guidelines recommend behavioral intervention to achieve a modest weight loss (e.g., 3-5%) as a first-line obesity treatment. Online behavioral obesity treatment, delivered via the Rx Weight Loss (RxWL) program, produces clinically significant initial weight losses. However, the program's pragmatic utility in routine medical care has yet to be tested. Further, additional research is needed to determine how best to extend the RxWL program to facilitate weight loss maintenance. This paper summarizes methods for a pragmatic trial aimed at identifying optimal methods for implementation of RxWL in primary care and evaluating relative effectiveness of two approaches to weight loss maintenance.


Hybrid implementation-effectiveness trial,Obesity,Primary care,Weight loss,