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. 2007 Oct;42(5):2056–2069. doi: 10.1111/j.1475-6773.2007.00705.x

Table 3.

Number and Percentage of Cases Incorrectly Classified by Algorithm as Not Being a Case, by Algorithm and Stage, 1998 Data

In Situ Localized Regional Metastatic Unknown
Nattinger 300 (23.6%) 935 (19.0%) 297 (18.4%) 204 (59.6%) 144 (74.6%)
Warren 349 (27.1%) 1,228 (24.4%) 384 (22.7%) 185 (43.0%) 139 (57.0%)
Freeman 528 (40.9%) 1,903 (37.8%) 665 (39.3%) 274 (63.7%) 200 (82.0%)

*Note: It is impossible to calculate the percentage of noncases that were false negatives by stage, because there is no stage information for the true negatives.