Table 2.

Pairwise Comparison of Clinicopathological Factors of Patients in the ER, LR, and NR Groups

Variable	P value
Vascular resection
ER vs NR	0.003
ER vs LR	0.761
LR vs NR	0.009
Perineural invasion
ER vs NR	<0.001
ER vs LR	0.004
LR vs NR	0.004
Positive margin status
ER vs NR	0.002
ER vs LR	0.265
LR vs NR	0.022
Pathological differentiation
ER vs NR	<0.001
ER vs LR	0.004
LR vs NR	0.142
N staging (8th edition)
ER vs NR	0.005
ER vs LR	0.584
LR vs NR	0.039
Tumor stage (8th edition)
ER vs NR	<0.001
ER vs LR	0.057
LR vs NR	0.056
IBIL
ER vs NR	0.020
ER vs LR	0.875
LR vs NR	0.019
CA19-9
ER vs NR	<0.001
ER vs LR	0.163
LR vs NR	0.004
CEA
ER vs NR	0.010
ER vs LR	0.521
LR vs NR	0.047

Notes: Variables including IBIL, CA19-9, and CEA were calculated using the Mann–Whitney U-test. The remaining variables were computed from partitions of the χ² method. Bold indicates significant values (P value <α′=0.0125).

Abbreviations: LR, late recurrence group; NR, no recurrence group; ER, early recurrence group.