Читать книгу Understanding Clinical Papers - David Bowers - Страница 20

Remember from the previous chapter that, compared with descriptive studies of a single group, analytic studies are more complex (and often more interesting). Analytic studies will usually involve some comparison and frequently aim to elucidate cause and effect in some way. Four kinds of observational analytic study will be described here:

 Ecological studies

 Cross‐sectional, two‐group studies

 Case–control studies

 Cohort analytic studies