Table 4. Mean Error Rates Compared by Institution, Note Type, Physician Sex, and Specialty.

Group 1 (No.) vs Group 2 (No.)	SR			MT			SN
	Error Rate, Mean (SD)		P Value	Error Rate, Mean (SD)		P Value	Error Rate, Mean (SD)		P Value
	Group 1	Group 2	P Value	Group 1	Group 2	P Value	Group 1	Group 2	P Value
Institution^a
Institution A vs institution B	7.6 (5.1)	6.6 (3.4)	.10	0.3 (0.5)	0.7 (1.0)	.03	0.2 (0.4)	0.6 (1.0)	.003
Note type
Discharge summaries (75) vs others (142)	8.9 (4.6)	6.6 (4.7)	<.001	0.4 (0.7)	0.4 (0.6)	.51	0.4 (0.7)	0.2 (0.5)	.08
Office notes (83) vs others (134)	7.0 (5.0)	7.6 (4.7)	.33	0.3 (0.5)	0.4 (0.7)	.28	0.1 (0.3)	0.4 (0.7)	<.001
Operative notes (59) vs others (158)	6.1 (4.3)	7.9 (4.9)	.01	0.4 (0.7)	0.4 (0.9)	.72	0.4 (0.7)	0.3 (0.5)	.34
Sex^b
Female (69) vs male (138)	7.7 (4.8)	7.5 (4.9)	.78	0.5 (6.4)	0.4 (6.7)	.65	0.3 (0.6)	0.3 (0.6)	.96
Specialty^c
General, internal, or family (53) vs others (138)	8.7 (4.6)	6.9 (4.7)	.02	0.5 (0.8)	0.4 (0.6)	.60	0.4 (0.7)	0.3 (0.6)	.38
Surgery (63) vs others (128)	6.0 (4.3)	8.1 (4.7)	.002	0.4 (0.5)	0.4 (0.7)	.49	0.3 (0.5)	0.3 (0.7)	.55
Subspecialties (75) vs others (116)	7.7 (4.8)	7.2 (4.6)	.48	0.4 (0.7)	0.4 (0.6)	.93	0.3 (0.6)	0.3 (0.6)	.70

Abbreviations: MT, medical transcriptionist–edited notes; SN, signed notes; SR, automatic transcriptions by the speech recognition system.

^{^a}

Number omitted to preserve deidentification.

^{^b}

Physician sex was missing for 10 notes.

^{^c}

Physician specialty was missing for 26 notes.