The NHS Breast Screening Programme (NHSBSP) was started in 1988 and is a large, organised cancer screening programme. It is delivered by 80 services across England and screens over 2 million women each year. As a screening programme, it must balance the detection of cancers against possible harm to women who do not have cancer. The NHSBSP was therefore designed with detailed information gathering and performance metrics right from the start. In this review paper, we examine how performance metrics in screening mammography have improved the national screening programme and the further developments and challenges that are expected in the years to come.
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