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Q In women who are 40 years of age, does annual mammographic screening reduce breast cancer mortality after 10 years?
Clinical impact ratings GP/FP/Primary care ★★★★★★☆ Gynaecology ★★★★★★☆ Oncology ★★★★★☆☆
METHODS
Design:
randomised controlled trial (Age trial).
Allocation:
concealed.*
Blinding:
unblinded.*
Follow up period:
mean 10.7 years.
Setting:
23 National Health Service breast screening units in England, Wales, and Scotland.
Patients:
160 921 women 39–41 years of age (mean age 40 y).
Intervention:
women who were allocated to the intervention group (n = 53 914) were offered annual screening by mammography up to and including the calendar year of their 48th birthday. Women who were allocated to the control group (n = 107 007) received usual medical care.
Outcomes:
breast cancer mortality and all cause mortality. …
Footnotes
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↵* See glossary.
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For correspondence: Dr S Moss, Institute of Cancer Research, Sutton, UK. sue.moss{at}icr.ac.uk
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Sources of funding: Medical Research Council and Cancer Research and US National Cancer Research Institute