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Table 2 Overall agreement of invasive and non-invasive histologies 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

 

NHSBSP

Total

ONS

Invasive

Non-invasive

 

   Invasive

4,567

148

4,715

   Non-invasive

54

1,117

1,171

Total

4,621

1,265

5,886

Percentage agreement

  

96.6%

Kappa statistic

  

0.9

Test for heterogeneity

   

   X21

  

6.1

   p

  

0.01

  1. NHSBSP, National Health Service Breast Screening Programme; ONS, Office for National Statistics.