Accuracy of carbon dioxide insufflation for endoscopic retrograde cholangiopancreatography using double-balloon endoscopy

Table 3 Comparison of clinical results according to evaluation groups

Group	A	B	C	D	P value1
Evaluation 1: Visual observation	Correct	Correct	Incorrect	Incorrect
Evaluation 2: CDE	Correct	Incorrect	Correct	Incorrect
n	35	1	13	3
Age	59.4 (21.4)	76	56.3 (23.3)	67.3 (6.0)	0.568
Male	20	0	9	3
Insertion time [minutes, mean (SD)]	16.9 (14.9)2	90	25.5 (22.3)	68.3 (45.0)	0.008
Incisor tooth to branch [minutes, mean (SD)]	4.8 (4.1)	20	8.5 (7.7)	16.6 (12.3)	0.042
Branch- target [minutes, mean (SD)]	12.0 (13.2)3	70	17.0 (18.1)	52.6 (32.5)	0.014
Total examination time [minutes, mean (SD)]	62.9 (26.6)	165	73.0 (33.9)	82.0 (33)	0.229
Treatment, n	26	0	7	0
Baseline CRP (mg/dL, mean (SD))	2.2 (4.0)	3.5	2.6 (2.7)	0.10 (0.11)
Baseline serum amylase [IU/L, mean (SD)]	175 (220)	793	138 (100)	118 (58)

¹Krustal-Wallis test.

²P = 0.042 (vs Group D).

³P = 0.047 (vs Group D), Mann-Whitney U test, Bonferroni correction. CRP: C-reactive protein; CDE: Carbon dioxide insufflation enterography.