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Table 1 Comparison of the total number of prevalent cases of breast cancer, estimated in different ways, and 1993 prevalence data.

From: Estimating the prevalence of breast cancer using a disease model: data problems and trends

  Total number of cases estimated % difference from 1993 data % of the gap explained
1993 data 123216 0.0 0.0
Baseline 66370 85.6 100.0
Combined 89169 34.4 59.9
>1970 101268 52.6 38.6
1% trend 103943 56.6 33.9
SP 113440 70.9 17.2
mortality 119769 80.5 6.1
  1. Baseline: baseline calculation, combined: adjusting for one-% trend and excluding incident cases of before 1970, >1970: excluding incident cases of before 1970, 1% trend: estimating the effect of a secular trend in incidence, SP: adjusting for secondary primaries, mortality: including excess mortality from non-breast cancer deaths.