Table 1. Baseline characteristics of all patients left- or right-sided liver resection for suspected PHC.

Characteristic	All suspected PHC (n=178)	Left-sided liver resection (n=76)	Right-sided liver resection (n=102)	P value
Female, n [%]	69 [39]	31 [41]	38 [37]	0.632
Age, mean [SD]	63 [10]	64 [9]	62 [11]	0.219
ASA, n [%]				0.945
I	34 [19]	14 [19]	20 [20]
II	117 [66]	51 [67]	66 [65]
III	27 [15]	11 [15]	16 [16]
ECOG performance state, n [%]				0.525
0	122 [68]	54 [71]	68 [67]
1	42 [24]	16 [21]	26 [26]
2	12 [7]	6 [8]	6 [6]
3	2 [1]	0	2 [2]
Tumor diameter, median [IQR]	30 [20–40]	30 [21–41]	25 [20–40]	0.221
Bismuth-Corlette type, n [%]	N=176
I	1 [1]	0	1 [1]	0.387
II	3 [2]	1 [1]	2 [2]	0.743
IIIa	79 [53]	5 [7]	89 [88]	<0.001
IIIb	42 [29]	49 [65]	0	<0.001
IV	24 [16]	20 [27]	9 [9]	0.002
Drainage method, n [%]				0.638
None	30 [17]	11 [15]	19 [19]
Endoscopic	84 [47]	35 [46]	49 [48]
Percutaneously	15 [8]	8 [11]	7 [7]
Both	49 [28]	22 [29]	27 [27]
Preoperative cholangitis, n [%]	67 [38]	30 [40]	37 [36]	0.663
Portal vein embolization, n [%]	24 [14]	0	24 [23]	<0.001
Extended resection, n [%]	61 [34]	8 [11]	53 [52]	<0.001
Vascular reconstruction, n [%]				0.301
Portal vein	41 [23]	14 [18]	27 [27]
Hepatic artery	0	0	0
Both	1 [1]	1 [1]	0
Final pathology, n [%]
PHC	149 [83]	65 [85]	84 [82]	0.571
Other	29 [17]	11 [15]	18 [18]	0.590
IPNB without invasion	8	4	4
GBC	1	0	1
IgG4 cholangitis	6	1	5
NET	1	0	1
CRLM	3	1	2
Cholangitis	7	4	3
Other benign	3	1	2

PHC, perihilar cholangiocarcinoma; IPNB, intraductal papillary neoplasms of the bile duct; NET, neuroendocrine tumor; CRLM, colorectal liver metastases; GBC, gallbladder carcinoma.