Using motion capture to assess colonoscopy experience level

Table 1 Demographic details on the participation physicians

	Sex		Age, yr		Colonoscopy experience		Colonoscopies performed in past 12 mo
	Male	Female	Median	Range	Median	Range	Median	Range
Novices (n = 11)	4	7	32	(28-37)	0	(0-2)	0	(0-2)
Experienced endoscopists (n = 10)
	8	2	55	(42-63)	2000	(350-4000)	52.5	(0-450)

Table 2 Metrics analysed for discriminatory ability

Kinect metrics	Experienced endoscopist	Novice	Levene’s test	P value
Percentage of time with hands closer than 25 cm (%)	7	23	0.048	0.02
Distance between hands (cm)	45	37	0.09	0.01
Angle of shoulders (degrees)	17	20	0.95	0.38
Right hand below z-line (cm)	25	36	0.95	0.01
Mean distance shoulder-hand (cm)	31	31
Left hand above z-line (cm)	6	15	0.03	0.005
Mean distance: shoulder-hand (cm)	32	31
Left elbow (degrees)	91	92	0.86	0.81
Right elbow (degrees)	144	140	0.55	0.55
Height participants (cm)	39	30	0.08	0.02
Compared to coordinates

Table 3 Experience correlated to pass score and cecal intubation rate

Test person	Competence	Total colonoscopies	Colonoscopies in last year	Z mean	Z-score passed	Cecal intubation
1	Experienced Endoscopist	3000	300	1.15	Yes	Yes
2	Experienced endoscopist	400	10	1.32	Yes	Yes
3	Experienced endoscopist	2000	0	1.25	Yes	Yes
4	Experienced endoscopist	1000	17	0.08	Yes	Yes
5	Experienced endoscopist	1700	150	0.30	Yes	Yes
6	Experienced endoscopist	4000	232	0.70	Yes	Yes
7	Experienced endoscopist	3000	14	0.78	Yes	Yes
8	Experienced endoscopist	2000	450	0.76	Yes	Yes
9	Experienced endoscopist	2000	75	0.82	Yes	Yes
10	Experienced endoscopist	350	30	0.73	Yes	Yes
11	Novice	0	0	1.54	No	No
12	Novice	0	0	1.48	Yes	No
13	Novice	0	0	1.28	Yes	Yes
14	Novice	0	0	2.26	No	Yes
15	Novice	1	1	6.19	No	Yes
16	Novice	0	0	0.27	Yes	Yes
17	Novice	0	0	6.50	No	No
18	Novice	0	0	5.25	No	Yes
19	Novice	0	0	1.17	Yes	No
20	Novice	0	0	3.25	No	Yes
21	Novice	2	2	0.65	Yes	No