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

Table 7 Single factor and multi factor analysis results of effective tumor volume% using bias field correction

Variable	Control	Single factor		Multi-factor
		Hazard ratio	P value	Hazard ratio	P value
Age	Increase by 1	1.018 (0.982-1.036)	0.453	1.008 (0.964-1.032)	0.812
ETV reduction rate	≥ 41% vs < 41%	0.523 (0.346-0.918)	0.018	0.412 (0.238-0.678)	< 0.001
Gender	Female vs male	0.736 (0.438-1.264)	0.234	0.748 (0.432-1.328)	0.324
Child-Pugh	Class A vs (class B or C)	0.423 (0.252-0.668)	< 0.001	0.298 (0.162-0.502)	< 0.001
BCLC staging	Stage B vs (stage C or D)	0.523 (0.318-0.852)	0.013	0.578 (0.332-0.976)	0.045
TACE type	Lipiodol vs DEB-TACE	1.178 (0.723-1.916)	0.548	0.832 (0.482-1.396)	0.464

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