The purpose of this study was to describe one method of classification
, based on anatomic-mammographic correlations, developed by Tabar. We
also wanted to examine how the mammograms categorized as low- and high
-risk according to Tabar and Wolfe criteria related to each other and
to three selected risk factors for breast cancer. The study materials
are based on questionnaires and mammograms from 3.640 Norwegian women,
aged 40-56 years, participating in the third Tromso study. The mammog
rams were categorized into five groups. Line drawings and their pathol
ogic correlates of the five patterns are described in detail. The Taba
r classification is based on anatomic-mammographic correlations, follo
wing three-dimensional (thick slice technique) histopathologic-mammogr
aphic comparisons, rather than simple pattern reading (Wolfe classific
ation). For analysis patterns I-III (Tabar) and N1 and P1 (Wolfe) were
grouped into low-risk groups and patterns IV and V (Tabar) and P2 and
DY (Wolfe) into high-risk groups. The overall agreement on high-risk
versus low risk for the two classifications was 54% with a kappa-value
of 0.22. The study displays that the strength of association between
high-risk mammographic patterns and the three selected risk factors pa
rity. number of children and age at first birth is of greater magnitud
e when the Tabar instead of the Wolfe classification is applied. More
patients are needed to compare the classification directly with the ri
sk of cancer. This study indicates that Further development of the cla
ssification of mammograms may increase the usefulness of mammographic
patterns in research and clinical practice. (C) 1997 Elsevier Science
Ireland Ltd.