Outcomes of robotic liver resection and intraoperative radiofrequency ablation for hepatocellular carcinoma in posterior segments VII and VIII

Table 4 Univariate and multivariate analysis of prognostic factors for recurrence-free survival in de novo data

Variable	Before PS matching (n = 36)				After PS matching (n = 32)
	Univariate		Multivariate		Univariate		Multivariate
	HR (95%CI)	P value	HR (95%CI)	P value	HR (95%CI)	P value	HR (95%CI)	P value
Treatment	0.13 (0.02-0.66)	0.014	1.15 (0.01-264.01)	0.960	0.16 (0.03-0.83)	0.029	0.92 (0.00-299.08)	0.977
Age	1.00 (0.95-1.07)	0.886			1.01 (0.95-1.08)	0.782
Gender	0.54 (0.07-4.30)	0.556			0.54 (0.07-4.38)	0.565
HBV	1.26 (0.31-5.08)	0.742			1.62 (0.40-6.51)	0.498
HCV	0.67 (0.14-3.22)	0.614			0.53 (0.11-2.59)	0.436
ICG-R15 < 10%	1.82 (0.49-6.80)	0.373			3.35 (0.88-12.70)	0.076	100.80 (0.28-36753.83)	0.125
Platelet	1.00 (0.99-1.01)	0.514			1.00 (0.99-1.01)	0.872
Prothrombin time	1.60 (1.11-2.30)	0.011	16.45 (0.51-528.83)	0.114	1.55 (1.09-2.20)	0.015	3.06 (0.10-93.96)	0.522
AST	1.00 (1.00-1.00)	0.127	1.00 (0.99-1.01)	0.970	1.00 (1.00-1.00)	0.180	1.00 (0.99-1.01)	0.643
ALT	1.00 (1.00-1.00)	0.955			1.00 (1.00-1.00)	0.882
AFP ≥ 100 ng/mL	2.36 (0.63-8.84)	0.203			2.41 (0.64-9.01)	0.191	1.65 (0.07-36.92)	0.753
Bilirubin total	1.15 (0.24-5.58)	0.861			0.97 (0.19-5.03)	0.970
Albumin	0.41 (0.12-1.38)	0.150	26.60 (0.34-2088.41)	0.141	0.41 (0.13-1.25)	0.115	7.23 (0.07-799.58)	0.410
ALBI	1.18 (0.25-5.71)	0.834			1.31 (0.27-6.34)	0.738
Child-Pugh	2.08 (0.43-10.07)	0.362			1.77 (0.37-8.54)	0.479
T stage	3.79 (1.16-12.31)	0.027	0.09 (0.00-4.55)	0.225	3.87 (1.22-12.25)	0.021	0.31 (0.01-18.91)	0.577
Major tumor size	1.35 (0.83-2.20)	0.228			1.51 (0.93-2.43)	0.095	3.89 (0.07-211.13)	0.505
Aggregate tumor size	1.30 (1.05-1.61)	0.016	1.57 (0.70-3.56)	0.276	1.32 (1.08-1.61)	0.007	1.33 (0.38-4.66)	0.652
Tumor numbers	1.70 (0.99-2.91)	0.055	4.65 (0.77-27.97)	0.093	1.62 (0.95-2.76)	0.076	12.29 (0.28-534.39)	0.192
BCLC	2.87 (0.88-9.38)	0.082	26.75 (0.89-803.48)	0.058	3.70 (1.10-12.41)	0.034	0.99 (0.00-395.47)	0.997
SAS	0.80 (0.20-3.20)	0.749			1.00 (0.25-4.01)	0.998
Complication	7.29 (1.94-27.33)	0.003	142.17 (0.37-55319.72)	0.103	6.14 (1.64-23.03)	0.007	0.42 (0.00-83.99)	0.750

HBV: Hepatitis B virus; HCV: Hepatitis C virus; ICG-R15: Indocyanine green retention rate at 15 minutes; AST: Aspartate aminotransferase; ALT: Alanine aminotransferase; AFP: Alpha-fetoprotein; ALBI: Albumin-Bilirubin grade; BCLC: Barcelona Clinic Liver Cancer; SAS: Surgical Apgar Score; PS: Propensity score; HR: Hazard ratio; CI: Confidence interval.