When practitioners take an evidence-based approach to chronic disease prevention, they undertake several important processes (1): 1) making decisions based on the best available scientific and rigorous program evaluation evidence; 2) applying program planning and quality improvement frameworks; 3) engaging the community and stakeholders in assessment and decision making; 4) adapting evidence-based interventions for specific populations or settings; and 5) conducting sound evaluation. By using an evidence-based approach, activities in public health practice are explicitly linked with the underlying scientific evidence that demonstrates the causes of chronic diseases, epidemiologic patterns of chronic diseases and risk factors, intervention effectiveness, and external validity.