Table 1. Baseline characteristics, n = 319.

Factor	No. (%)	Possible/definite CRI, n  = 236 (%)	No CRI, n  = 83 (%)	P
Job Role
Gastroenterologist	216 (67.7)	158 (73.1)	58 (26.9)	0.162
Surgeon	23 (7.2)	14 (60.9)	9 (39.1)
Nurse endoscopist	80 (25.1)	64 (80)	16 (20)
Age
20–30	3 (0.9)	1 (33.3)	2 (66.7)	0.444
31–40	63 (19.7)	49 (77.8)	14 (22.2)
41–50	135 (42.3)	102 (75.6)	33 (24.4)
51–60	88 (27.6)	63 (71.6)	25 (28.4)
> 60	30 (9.4)	21 (70.0)	9 (30.0)
Gender
Male	217 (68.0)	150 (69.1)	67 (30.9)	0.004
Female	102 (32.0)	86 (84.3)	16 (15.7)
Country/continent
UK	231 (72.4)	170 (73.6)	61 (26.4)	0.989
Europe	48 (15.0)	37 (77.1)	11 (22.9)
Asia and Australia	15 (4.7)	11 (73.3)	4 (26.7)
North and South America	14 (4.4)	10 (71.4)	4 (28.6)
Africa	11 (3.4)	8 (72.7)	3 (27.3)
Hospital or health practice
District hospital/community practice with < 5 specialists performing endoscopy	22 (6.9)	21 (95.5)	1 (4.5)	0.073
District hospital/community practice with ≥ 5 specialists performing endoscopy	127 (39.8)	88 (69.3)	39 (30.7)
Teaching hospital/academic practice (university-affiliated group with < 5 specialists performing endoscopy)	28 (8.8)	20 (71.4)	8 (28.6)
Teaching hospital/academic practice (university-affiliated group with ≥ 5 specialists performing endoscopy)	142 (44.5)	107 (75.4)	35 (24.6)
Video Endoscopy System
Olympus	270 (84.6)	197 (73.0)	73 (27.0)	0.622
Fujifilm	25 (7.8)	20 (80.0)	5 (20.0)
Pentax	24 (7.5)	19 (79.2)	5 (20.8)
Colonoscopies/year
< 150	55 (17.2)	38 (69.1)	17 (30.9)	0.399
> 150	264 (82.8)	198 (75.0)	66 (25.0)
Lifetime total
< 5000	199 (62.4)	147 (73.9)	52 (26.1)	0.973
> 5000	120 (37.6)	89 (74.2)	31(25.8)
Hour/week
< 6	46 (14.4)	35 (76.1)	11 (23.9)	0.856
> 6	273 (85.6)	201 (73.6)	72 (26.4)
Years performing colon
0–5	58 (18.2)	43 (74.1)	15 (25.9)	0.945
6–10	63 (19.7)	46 (73.0)	17 (27.0)
> 10	198 (62.1)	147 (74.2)	51 (25.8)

CRI, colonoscopy-related musculoskeletal injury.