Table 2.

Univariate analysis of factors associated with lymph node evaluation in patients with intrahepatic cholangiocarcinoma

	All patients (n = 4893)			Major liver resection (n = 733)
	OR	95% CI	P-value	OR	95% CI	P-value
Agea	0.71	(0.67–0.76)	<0.001	0.71	(0.63–0.80)	<0.001
White race	1.31	(1.05–1.64)	0.018	1.28	(0.88–1.88)	0.197
Female	1.05	(0.89–1.24)	0.572	0.88	(0.66–1.18)	0.390
Tumour size	0.97	(0.94–0.99)	0.014	1.00	(0.96–1.05)	0.987
AJCC 7th edition M1	0.48	(0.39–0.58)	<0.001	0.87	(0.53–1.43)	0.587
Diagnosis yearb	0.98	(0.96–1.00)	0.014	1.00	(0.97–1.04)	0.780
Major liver resection	12.68	(10.50–15.31)	<0.001	–	–	–

^aOdds ratio per 10-year increment.

^bModelled as a continuous variable.

OR, odds ratio; 95% CI, 95% confidence interval; AJCC, American Joint Committee on Cancer.