Removal of radiation dose response effects: an example of over-matching

BMJ 2002; 325 doi: (Published 23 November 2002) Cite this as: BMJ 2002;325:1235

The authors of this Education and debate article, J L Marsh, J L Hutton, and Keith Binks, have confirmed that the equation in the section headed “Method: analysis of a matched case-control study” contained an error (10 August, p 327-30). “Exp” should have appeared before the β symbol in the conditional likelihood.


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