Missing data are a big concern in any research project; however, despite investigators’ best efforts they are often unavoidable. Missing outcomes have two effects: they reduce precision and power, and they may introduce bias. The statistician can’t do much about the loss of precision, except to make best use of the data that are available; […]
Scoping reviews are exploratory projects that systematically map the literature on a topic, identifying key concepts, theories and sources of evidence. Scoping reviews are often conducted before full syntheses, and undertaken when feasibility of the research is considered to be a challenge, either because the relevant literature is thought to be vast and diverse (varying […]
