Table 2:

Error classes of five studies that reported error types SR and DT (after Kanal, 2001).

Author	Date	Title	SR or DT	Class 0	Errors / Report	Class 1	Errors / Report	Class 2	Errors / Report	Class 3	Errors / Report
				Formatting Errors		Grammatically Incorrect		Meaning Different (error was obvious)		Meaning Different (error not obvious)
Basma et al.	2011	Error rates in breast imaging reports: comparison of automatic speech recognition and dictation transcription	SR	Punctuation error	0.16	Verb tense	0.04	Word omission	0.14	Wrong word	0.01
				Spelling mistakes	0.03	Plural	0.06	Word substitution	0.13	Incorrect measurement	0.01
						Incomplete phrase	0.01	Nonsense phrase	0.02	Missing or added “no”	0.01
								Added word	0.15
			DT	Punctuation error	0.02	Verb tense	0.02	Word omission	0.04	Wrong word	0.00
				Spelling mistakes	0.03	Plural	0.02	Word substitution	0.05	Incorrect measurement	0.00
						Incomplete phrase	0.00	Nonsense phrase	0.00	Missing or added “no”	0.00
								Added word	0.04
Chang et al.	2011	Nonclinical errors using voice recognition dictation software for radiology reports: a retrospective audit	Combined	Type E – punctuation	0.03	Type F – other including spelling	0.03	Type A – wrong word substitution	0.18	Type C – deletion	0.07
										Type D – insertion	0.13
			SR					Type B – Nonsense phrase	0.02
			DT					Type B – Nonsense phrase	0.05
David et al.	2014	Error rates in physician dictation: quality assurance and medical record production	SR			Made up words	0.14	Age mismatch	0.03	Wrong patient	0.07
								Gender mismatch	0.05	Wrong drug name/dosage	0.05
								Wrong name	0.01	Name/dosage	0.04
								Wrong doctor	0.02	Wrong lab values	0.01
								Wrong date	0.01	Left/right discrepancy	0.03
								Other	0.20	Medical discrepancy other	0.00
			DT			Made up words	0.11	Age mismatch	0.04	Wrong patient	0.05
								Gender mismatch	0.02	Wrong drug	0.05
								Wrong name	0.02	Name/dosage	0.01
								Wrong doctor	0.02	Wrong lab values	0.03
								Wrong date	0.03	Left/right discrepancy	0.02
								Other	0.38	Medical discrepancy other	0.04
McGurk et al.	2008	The effect of voice recognition software on comparative error rates in radiology reports	SR			Trivial (no changes to understanding)	0.02	Effect understanding	0.03
			DT			Trivial (no changes to understanding)	0.01	Effect understanding	0.01
Ramaswamy et al.	2000	Continuous speech recognition in MR imaging reporting: Advantages, disadvantages, and impact	SR	Irregular spacing	2.98	Spelling errors	0.30			Omissions and duplications	0.372
			DT	Irregular spacing	0.11	Spelling errors	1.12			Omissions and duplications	0.1116

Class 0 errors: no change in meaning and grammatically correct; class 1 errors: no change in meaning but grammatically incorrect; class 2 errors: meaning was different but error was obvious; class 3 errors: meaning was different but not obvious.²⁸