Research Needs for Implementing Cancer Prevention and Early Detection in Developing Countries: From Scientists’ to Implementers’ Perspectives

Figure 5

Illustration of special research approaches to advance implementation according to the strength of scientific evidence. Signs + and – refer to a higher or lower strength of evidence and magnitude of the effect. The place of a given research approach indicates its suitability in the specific situation resulting from combining the strength of evidence and potential magnitude of the effect. Suitability of studies for a given situation does not restrict their use in other contexts and conditions, and it does not exclude the possibility of combining research approaches in a single study. Interventions studies as described in Figure 2.