Table 4.

First gastroenterologist mean radiation doses (μGy) for groups A and B per ERCP procedure. The range is in parenthesis.

First gastroenterologist	Group	n	Radiation dose (μGy)
Chest	All	153	6.4 (0.2–35.1)
	A	111	6.1 (0.2–37.8)
	B	42	6.7 (1.1–30.1)
Thyroid	All	153	5.40 (0.02–27.6)
	A	111	5.40 (0.2–27.6)
	B	42	5.52 (1.03–26.1)
Eye lens	All	153	3.81 (0.2–26.3)
	A	111	3.51 (0.2–26.3)
	B	42	4.45 (0.7–21.0)
Hand	All	153	27.2 (1.02–223.2)
	A	111	27.3 (1.02–223.2)
	B	42	26.9 (2.9–171.5)
Back shoulder	All	85	38.7 (0.70–282.3)
	A	61	60.1 (0.70-282.3)
	B	36	39.3 (1.25–191.2)
Waist	All	85	100.5 (13.6–381.3)
	A	61	101.2 (13.6–381.3)
	B	36	99.5 (14.7–291.0)
Leg	All	54	1.60 (0.2–17.1)
	A	30	1.50 (0.2–15.9)
	B	24	2.00 (0.2–17.1)

n: sample size.