Letters

Authors' reply

BMJ 1996; 313 doi: http://dx.doi.org/10.1136/bmj.313.7069.1398a (Published 30 November 1996) Cite this as: BMJ 1996;313:1398
  1. Paul Brennan,
  2. Beverley Harrison,
  3. Alan Silman,
  4. Deborah Symmons
  1. Lecturer Research fellow Professor Senior lecturer On behalf of the Norfolk Arthritis Register Arthritis and Rheumatism Council Epidemiology Research Unit, University of Manchester Medical School, Manchester M13 9PT

    EDITOR,—Paul Emery and colleagues' letter shows several misunderstandings of our study. We agree that the American College of Rheumatology's criteria for rheumatoid arthritis were not devised for early disease and have ourselves questioned their use in epidemiological surveys.1 In the absence of an alternative, however, we used these criteria to enable comparability with previous studies. Indeed, Emery and colleagues used the criteria in their study.2

    The authors suggest that misclassification of new erosions and clinical features might have occurred but do not discuss …

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