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

Table 5 Univariate and multivariate analysis of prognostic factors for overall survival in first recurrence data

Variable	Before PS matching (n = 57)				After PS matching (n = 16)
	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	1.34 (0.41-4.43)	0.631			1.45 (0.32-6.52)	0.626
Age	1.01 (0.98-1.05)	0.441			1.14 (1.00-1.29)	0.056	1.04 (0.81-1.32)	0.769
Gender	1.17 (0.55-2.47)	0.679			0.29 (0.03-2.40)	0.249
HBV	0.50 (0.24-1.04)	0.064	0.52 (0.24-1.11)	0.090	0.20 (0.04-0.95)	0.042	0.06 (0.00-1.45)	0.084
HCV	1.38 (0.63-3.03)	0.415			2.03 (0.45-9.18)	0.356
ICG-R15 < 10%	0.48 (0.20-1.18)	0.109	0.73 (0.27-1.99)	0.533	0.00 (0.00-inf)	0.994
Platelet	0.99 (0.99-1.00)	0.050	1.00 (0.99-1.00)	0.516	1.00 (0.99-1.01)	0.778	1.12 (0.08-15.00)	0.930
Prothrombin time	1.85 (1.06-3.23)	0.031	1.31 (0.77-2.25)	0.319	3.92 (0.97-15.91)	0.056
AST	1.00 (1.00-1.00)	0.526			1.00 (1.00-1.00)	0.917
ALT	1.00 (1.00-1.00)	0.639			1.00 (1.00-1.00)	0.973
AFP ≥ 100 ng/mL	0.69 (0.24-1.99)	0.493			0.00 (0.00-inf)	0.994
Bilirubin total	3.31 (0.74-14.89)	0.118	2.44 (0.42-14.28)	0.321	7.55 (0.24-234.20)	0.249
Albumin	0.47 (0.20-1.09)	0.079	0.65 (0.25-1.71)	0.383	0.44 (0.07-2.81)	0.389
ALBI	1.70 (0.69-4.18)	0.249			2.08 (0.40-10.81)	0.383
Child-Pugh	0.95 (0.13-7.01)	0.962			0.00 (0.00-inf)	0.995
T stage	0.96 (0.52-1.77)	0.899			0.74 (0.24-2.28)	0.602
Major tumor size	1.05 (0.89-1.25)	0.539			1.11 (0.49-2.54)	0.802
Aggregate tumor size	1.06 (0.90-1.25)	0.457			1.15 (0.50-2.66)	0.747
Tumor numbers	1.11 (0.60-2.04)	0.740			0.59 (0.14-2.56)	0.479
BCLC	1.09 (0.60-1.97)	0.786			0.51 (0.13-1.92)	0.316
SAS	1.73 (0.84-3.55)	0.137	1.25 (0.57-2.75)	0.574	4.70 (0.90-24.48)	0.066	0.94 (0.04-22.31)	0.972
Complication	0.67 (0.23-1.93)	0.459			2.08 (0.40-10.81)	0.383

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.