Table 2

 Participants’ responses to written knowledge items completed at the end of focus group session about mammography screening and overdiagnosis (n=50)

ItemNo (%) of women
Who is more likely to be diagnosed with breast cancer? (multiple choice):
 Women who have screening mammograms (correct answer)35 (70)
 Women who do not have screening mammograms10 (20)
 Unsure5 (10)
What is meant by the term “overdetection”? (free response question):
 Full marks30 (60)
 Partially correct12 (24)
 Incorrect8 (16)