Table 1. Correlation between PSMA3-AS1 expression and clinicopathological characteristics of CCA patients.

Clinicopathological parameters	Total	PSMA3-AS1 expression		P-value
		Low	High
Age (years)
<60	19	11	8	0.106
≥60	47	17	30
Gender
Male	29	14	15	0.394
Female	37	14	23
Differentiation grade
Well/moderate	28	15	13	0.116
Poor/undifferentiated	38	13	25
Serum CA19-9 level
≤37 U/ml	25	13	12	0.219
>37 U/ml	41	15	26
Serum CEA level
≤5 ng/ml	23	13	10	0.090
>5 ng/ml	43	15	28
TNM stage
I–II	20	13	7	0.014*
III–IV	46	15	31
Lymph node invasion
No	27	16	11	0.021*
Yes	39	12	27

^*P < 0.05. Abbreviations: PSMA3-AS1: proteasome subunit α3 antisense RNA 1; CCA: cholangiocarcinoma; CA19-9: carbohydrate antigen 19-9; CEA: carcinoembryonic antigen.