Table 3.

Analysis of errors

Error type	No of errors	% Total errors
Substring of more complex concept incorrectly coded (eg, report for “post-mastectomy scar” retrieved for query “mastectomy”)	17	23.29%
Information provided in clinical diagnosis is incorrect or incongruent with pathological diagnosis (eg, report describing specimen labeled by clinicians as “DFSP” is retrieved for query “DFSP” even though pathologic diagnosis was not DFSP)	15	20.55%
Finding or diagnosis is expressed as uncertain (eg, “cannot exclude”)	14	19.18%
Initials in report are misinterpreted as abbreviation and thus miscoded (eg, report with initials “HL” retrieved for query “Hodgkin's Lymphoma”)	11	15.07%
Concepts present in report are historical (eg, report describing “previous history of renal cell carcinoma” retrieved for query “renal cell carcinoma”)	8	10.96%
Correct concepts but incorrect conceptual relationships (eg, report containing “prostate cancer without perineural invasion, and urothelial cancer with perinerual invasion” is returned for query “prostate cancer with perineural invasion”	6	8.22%
Negated concepts incorrectly identified as present (eg, report containing “neither prostatic intraepithelial carcinoma (PIN) nor carcinoma is seen” is returned for query containing “neither prostatic intraepithelial carcinoma (PIN)”	2	2.74%
Total no of errors	73	100%