Magnetic resonance imaging bias field correction improves tumor prognostic evaluation after transcatheter arterial chemoembolization for liver cancer

Table 6 Results of baseline effective tumor volume single factor and multi factor analysis using bias field correction

Variables	Control	Single factor		Multi-factor
Age	Increase by 1	Hazard ratio	P value	Hazard ratio	P value
Pre-treatment ETV (cm³)	≥ 415 vs < 415	1.018 (0.982-1.036)	0.453	1.008 (0.964-1.032)	0.832
Gender	Female vs male	1.982 (1.212-3.236)	0.012	1.442 (0.823-2.558)	0.178
Child-Pugh classification	Class A vs (class B or C)	0.736 (0.438-1.264)	0.234	0.728 (0.416-1.282)	0.273
BCLC staging	Stage B vs (stage C or D)	0.423 (0.252-0.668)	< 0.001	0.432 (0.256-0.702)	< 0.001
Type of TACE	Control	0.523 (0.318-0.852)	0.013	0.538 (0.318-0.916)	0.023
Variables	Lipiodol vs DEB-TACE	1.178 (0.723-1.916)	0.548	1.016 (0.612-1.682)	0.976

ETV: Effective tumor volume; BCLC: Barcelona Clinic Liver Cancer; DEB-TACE: Drug-eluting bead transcatheter arterial chemoembolization.