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EDITOR
Werneke and McPherson1 question the detection rates
of cancer observed in the breast screening programme in East Sussex,
Brighton, and Hove that we reported in our recent paper.2 They suggest that these are the result of a high proportion of false
positive screens. It is unfortunate that they did not consult us
beforehand. The paper gives results of an ongoing study, but the
cancers reported are those confirmed by histological examination after
surgery, not preliminary suspected cancers at "positive" screens.
The statistical programme was not run until some months after the end
of the screening period, when all the screening episodes had been
completed and the women concerned had been assessed, diagnosed, and
operated on as appropriate.
The East Sussex area has always tended to have a high detection rate
for cancer, possibly because of the local sociodemographic composition
of the population, and the rate over this period