Types of study in medical research: part 3 of a series on evaluation of scientific publications.

  title={Types of study in medical research: part 3 of a series on evaluation of scientific publications.},
  author={Bernd R{\"o}hrig and Jean-Baptist du Prel and Daniel Wachtlin and Maria Blettner},
  journal={Deutsches Arzteblatt international},
  volume={106 15},
BACKGROUND The choice of study type is an important aspect of the design of medical studies. The study design and consequent study type are major determinants of a study's scientific quality and clinical value. METHODS This article describes the structured classification of studies into two types, primary and secondary, as well as a further subclassification of studies of primary type. This is done on the basis of a selective literature search concerning study types in medical research, in… CONTINUE READING
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