Causes associated with recurrent choledocholithiasis following therapeutic endoscopic retrograde cholangiopancreatography: A large sample sized retrospective study

Table 1 General characteristics compared between the recurrence group and control group

Variable	Recurrence group (n = 477)	Control group (n = 477)	OR (95%CI)	P-value
Sex (male/female)	216/261	229/248	1.116 (0.865-1.439)	0.399
Age > 65 yr (Y/N)	181/296	134/343	2.437 (1.818-3.266)	0.000
Weight (kg), mean ± SD	57.94 ± 16.80	58.24 ± 11.31	0.992 (0.980-1.004)	0.196
1Recurrence time (d), mean ± SD	17.77 ± 19.30	17.85 ± 17.25	1.000 (0.993-1.007)	0.950
History of drinking (Y/N)	42/423	61/416	0.677 (0.447-1.026)	0.066
History of smoking (Y/N)	69/395	86/391	0.794 (0.562-1.123)	0.192

¹Recurrence time was defined as time from the onset of stone removal to recurrence. OR: Odds ratio; 95%CI: 95% confidence interval; Y: Yes; N: No.