Table 1.

Observer characteristics^a

	MPEG4 video (n = 63)		DICOM viewer (n = 80)		Total (n = 143)
	n	%	n	%	n
Sex
Male	61	97	72	90	133
Female	2	3	8	10	10
Area
USA	8	13	18	23	26
Europe	38	60	32	40	70
Asia	4	6	8	10	12
Canada	3	5	5	6	8
U.K.	3	5	8	10	11
Australia	3	3	0	0	3
Other	4	6	9	11	13
Years in independent practice
0–5	22	35	19	24	41
6–10	15	24	26	33	41
11–20	17	27	22	28	39
21–30	9	14	13	16	22
Specialization
General orthopedics	12	19	11	14	23
Orthopedic traumatology	44	70	58	73	102
Shoulder and elbow	1	2	0	0	1
Hand and wrist	0	0	2	3	2
Others	6	10	9	11	15
Supervision of trainees
Yes	55	87	72	90	127
No	8	13	8	10	16

^aDemographics of observers that started with the evaluation