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J Am Med Inform Assoc 14:736-745 doi:10.1197/jamia.M2130
  • The Practice of Informatics

Collection of Cancer Stage Data by Classifying Free-text Medical Reports

Table 9

Confusion Matrix Comparing T and N Stage Assigned by Experts and the Proposed System2

System System
T1 T2 T3 T4 NX N0 N1 N2
Experts Experts
T1 39 10 0 1 NX 10 6 1 0
T2 6 80 2 13 N0 2 105 0 1
T3 0 7 2 1 N1 0 8 27 1
T4 1 5 0 12 N2 0 3 2 13

  • ↵2 Because there were no gold-standard cases, TX results are not reported; however, the system was successful in not inserting any false positive TX cases.

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