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Table 4 Model estimates of breast cancer screening and progression parameters in womenaged 40 to 49 years

From: Modelling the overdiagnosis of breast cancer due to mammography screening in womenaged 40 to 49 in the United Kingdom

Parameter Estimate
  Median 95% CI
Screening test sensitivity (%)  
Invasive 90.0 (72.0-98.9)
In-situ 81.7 (43.4-99.0)
Mean sojourn time (years)  
Invasive 0.84 (0.64-1.21)
Progressive in situ 0.11 (0.05-0.19)
Non-progressive in situ 1.29 (0.41-3.44)
% of screen-detected in situ that is non-progressive  
Prevalent screen 55 (25-77)
Incident screens 40 (22-60)