Table 1.

Clinical characteristics of patients

	C-CCA group	S-CCA group	P value
Incidence (%)	10/211 (4.7)	12/197 (6.1)	0.546
Unilateral stones	8/168 (4.8)	7/156 (4.5)	0.906
Bilateral stones	2/43 (4.7)	5/41 (12.2)	0.211
Age, yr (range)	61 (39-82)	59 (46-69)	0.742
Gender (%)
Male	1 (10)	1 (8.3)	0.892
Female	9 (90)	11 (91.7)
Mean interval from operation to CCA, mo (range)	-	67 (7-138)	-
Mean interval from CCA to disease-related death, mo (range)	41 (3-107)	4 (0-13)	0.075
Follow-up time, mo (range)	56 (2-140)	71 (7-144)	0.291
Mortality, n (%)
Overall	7 (70)	12 (100)	0.041
Disease-related	6 (60)	12 (100)	0.015

C-CCA: Concomitant cholangiocarcinoma; S-CCA: Subsequent cholangiocarcinoma; CCA: Cholangiocarcinoma.