Table 2.

Univariate Survival Analyses for All 63 Patients and for 50 Patients Surviving More Than 2 Months

Factor	P value (n = 63)	P value (n = 50)
Extrahepatic biliary duct	0.0005^*	0.0001^*
Year of treatment	0.0221^*	0.0229^*
Transplant and postoperative radiotherapy	0.0313^*	0.0413^*
Total radiation dose	0.0394^*	0.9882
Surgery, extent	0.0430^*	0.0721
NTD₂,^† external beam	0.0488^*	0.3659
Sex	0.0714	0.0970
Systemic metastases	0.1136	0.0520
Prior liver disease	0.1404	0.1856
Initial tissue diagnosis	0.3531	0.1611
Age	0.3937	0.8909
Brachytherapy	0.4340	0.8670
Chemotherapy	0.4454	0.1143
Split-course irradiation	0.5936	0.5262
Field size	0.6502	0.6344
Lymphadenopathy	0.9376	0.4889

Statistical significance (P < 0.05).

^†

Normalized total dose at 2 Gy per fraction.