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

Table 3 Univariate and multivariate analysis of prognostic factors for overall survival in de novo 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	0.61 (0.18-2.14)	0.443			0.58 (0.10-3.47)	0.548
Age	1.03 (0.98-1.08)	0.193	1.04 (0.99-1.10)	0.150	1.15 (0.97-1.37)	0.107	1.63 (0.74-3.56)	0.224
Gender	2.55 (1.00-6.49)	0.050	4.98 (1.03-24.06)	0.046	0.57 (0.06-5.12)	0.613
HBV	0.83 (0.32-2.15)	0.706			0.81 (0.13-4.89)	0.818
HCV	0.70 (0.23-2.13)	0.528			0.36 (0.04-3.27)	0.363
ICG-R15 < 10%	0.62 (0.20-1.89)	0.403			0.00 (0.00-inf)	0.995
Platelet	1.00 (0.99-1.00)	0.458			1.00 (0.98-1.02)	0.988
Prothrombin time	1.09 (0.74-1.59)	0.674			2.80 (0.69-11.37)	0.151	6.42 (0.17-249.92)	0.319
AST	1.00 (1.00-1.00)	0.973			1.00 (1.00-1.00)	0.772
ALT	1.00 (1.00-1.00)	0.869			1.00 (1.00-1.00)	0.594
AFP ≥ 100 ng/mL	1.15 (0.33-3.99)	0.823			0.00 (0.00-inf)	0.996
Bilirubin total	0.48 (0.09-2.71)	0.409			0.30 (0.00-22.14)	0.584
Albumin	0.55 (0.20-1.53)	0.252			0.12 (0.01-1.48)	0.098	31.48 (0.00-3.6 × 109)	0.716
ALBI	1.56 (0.51-4.73)	0.435			6.28 (0.86-45.89)	0.07	30.75 (0.00-8.2 × 106)	0.591
Child-Pugh	0.00 (0.00-inf)	0.996			0.00 (0.00-inf)	0.996
T stage	1.23 (0.62-2.42)	0.554			0.54 (0.09-3.09)	0.489
Major tumor size	1.18 (0.97-1.44)	0.106	1.40 (0.53-3.70)	0.497	1.64 (0.58-4.62)	0.346
Aggregate tumor size	1.16 (0.96-1.42)	0.132	0.95 (0.38-2.37)	0.905	1.28 (0.46-3.62)	0.638
Tumor numbers	0.88 (0.34-2.32)	0.800			0.00 (0.00-inf)	0.996
BCLC	1.59 (0.72-3.49)	0.249			0.71 (0.15-3.42)	0.67
SAS	0.95 (0.38-2.41)	0.917			2.26 (0.38-13.60)	0.373
Complication	1.07 (0.31-3.72)	0.911			6.28 (0.86-45.89)	0.07	0.05 (0.00-2.7 × 1012)	0.853

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; inf: Infinity.