Skip to main content

Table 3 Agreement of invasive and non-invasive cancer histologies over time in participants of the Million Women Study

From: Breast cancer histological classification: agreement between the Office for National Statistics and the National Health Service Breast Screening Programme

Year Number of cases Percentage agreement κ value
1996 102a 0.92 0.73
1997 1,093 0.94 0.84
1998 2,018 0.96 0.89
1999 1,572 0.96 0.89
2000 773 0.97 0.91
2001 315b 0.95 0.86
  1. aLower number of cases in 1996 as this is the first year of recruitment into the Million Women Study.
  2. bLower number of cases in 2001 as only cases diagnosed up to the end of March 2001 were included in the analysis. Test for trend: X21 = 5.2, p = 0.02.