Which statement is true regarding research questions in interventional studies?

The statement about research questions in interventional studies being that they need to specify the factors of interest is indeed true. In interventional research, having clear and specific research questions is essential because it helps researchers understand what they are investigating and guides the design of the study. Specifying the factors of interest—such as the intervention being tested, the population being studied, and the outcomes being measured—ensures that the research is focused and that the results will be relevant and applicable. This clarity not only enhances the validity of the study but also aids in the interpretation of the results and their implications for practice.

In contrast, vague research questions can lead to unclear objectives and difficulty in assessing the effectiveness of the intervention. While comparing random groups can be an important aspect of some interventional studies, it is not a requirement for all types of research questions in this field. Additionally, focusing solely on outcomes without considering the factors at play would neglect the complex interactions that can influence those outcomes, leading to an incomplete understanding of the intervention's effectiveness. Therefore, specifying the factors of interest provides a solid foundation for conducting meaningful and applicable research in interventional studies.