Mammography: how has it changed the breast cancer landscape?

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  • The introduction of mammographic screening in 1982 has been associated with increased breast cancer incidence, a shift to earlier stage at diagnosis, and increased survival.
Why this matters
  • Mammographic screening has contributed to the 34% drop in breast cancer mortality from 1990 to 2013.
Study design
  • This is a study of all breast cancer cases from the Surveillance, Epidemiology and End Results (SEER) cancer registry (1973-2013).
  • Outcome measures include breast cancer incidence, mortality and stage at diagnosis.
  • Results are divided into 3 periods: prescreening (before 1982), transitional (1983-1990), and postscreening (1991-2013).
  • Funding: Source not disclosed.
Key results
  • Breast cancer incidence rose by 4% per year from 1982 to 1986 and then increa...