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International Journal of Epidemiology 2003;32:1112
© International Epidemiological Association 2003

Letter to the Editor

Case-control studies of screening should carry a health warning. Response

Margaret Hoffman1, Lynn Rosenberg2 and Samuel Shapiro3

1 School of Public Health and Family Medicine, University of Cape Town, South Africa.
2 Slone Epidemiology Center, Boston University, USA.
3 Slone Epidemiology Unit, Boston University, USA.

Correspondence: Prof. M Hoffman, Department of Public Health and Primary Health Care, Faculty of Health Sciences, University of Cape Town, Anzio Road, Observatory 7925, South Africa. E-mail: mh@cormack.uct.ac.za

The first 10% of the full text of this article appears below.

In her commentary1 on our study of Pap smear screening and cervical cancer in South Africa,2 Dr Raffle makes three major criticisms.

Dr Raffle cites the importance of validating screening histories from records.3 Given the lack of complete and available records on . . . [Full Text of this Article]


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