Table 4

Contingency table for system/abstractor and the final abstracted codes on the evaluation set for (a) leiomyomas, (b) endometriosis and (c) adenomyosis

SystemAbstractor
YesNoNot reportedConflictYesNoNot reported
Final abstracted codes (n)
(a) Leiomyomas
 Yes (684)6731916142248
 No (25)816011213
 Not reported (584)50579012196376
Total (1293)686175882627239427
(b) Endometriosis
 Yes (105)10300290114
 No (14)103011310
 Not reported (1174)00117402141158
Total (1293)11331174393181182
(c) Adenomyosis
 Yes (533)51501804971521
 No (33)724023291
 Not reported (727)2072505252470
Total (1293)524247432505296492
  • Results along the main diagonal (bold font) show feature value concordance, while the off-diagonal results show the feature value discrepancies.

  • Discrepancies in abstractor coding of ‘No’ and ‘Not reported’ values for leiomyomas and adenomyosis highlights the possible extent of abstractor inference in the coding of ‘No’ values.