Meaning of term “observational study” needs to be defined

BMJ 1996; 313 doi: https://doi.org/10.1136/bmj.313.7057.628c (Published 07 September 1996) Cite this as: BMJ 1996;313:628
  1. Robert Sherriff
  1. Senior registrar in public health medicine North West Anglia Health Authority, Peterborough PE3 6JG

    EDITOR,—Is anyone else confused about the use of the term “observational study”? Nick Black uses it when referring to cohort and …

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