Behaviors associated with cancer screening have been the focus of intensive research over the past 2 decades, primarily in the form of intervention trials to improve screening based in both clinical and community settings. Meta-analyses and literature reviews have synthesized and organized the resulting literature. I n more than 2 decades of research, it has been demonstrated clearly that cancer screening rates can be improved through a variety of community-based and clinic-based strategies. Researchers have developed and tested many innovations, revealing a complex interplay between screening behaviors, barriers, intervention methods, and study designs. This field of inquiry, however, is still young, as evidenced in widely varying definitions of key variables, applications of theory, and evaluation methods. In addition, for most studies, outcomes have yet to be accompanied by an understanding of why, how, or specifically for whom a strategy does or does not work. Consequently, the task of synthesizing research to date is challenging, and questions regarding future directions are timely.For this report, we considered developments in communitybased screening intervention research that qualify as lessons learned. These include not only intervention results and methodologic advances but also questions that must be addressed if further progress is to be made. Rather than providing a literature review, we offer commentary on the nature and quality of the evidence, both as a basis for practice today and as suggestions for future research.
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