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Table 4 Univariate and multivariate analyses of factors associated with overall survival rates

From: Laparoscopic versus open hepatectomy for intrahepatic cholangiocarcinoma in patients aged 60 and older: a retrospective cohort study

Variable

Univariable cox regression analysis

Multivariable cox regression analysis

HR

95%CI

P value

HR

95%CI

P value

Sex male (vs. female)

1.209

0.662–2.210

0.537

   

Age (years)

1.043

0.980–1.111

0.188

   

Weight (kg)

0.977

0.953–1.001

0.063

0.993

0.930–1.061

0.845

BMI (kg/m2)

0.908

0.836–0.986

0.022

0.972

0.772–1.223

0.809

ASA score

 1

-

-

-

   

 2

0.450

0.108–1.882

0.274

   

 3

0.249

0.041–1.512

0.131

   

Diabetes yes (vs. no)

0.720

0.304–1.704

0.455

   

Hypertension yes (vs. no)

0.769

0.403–1.466

0.424

   

Coronary heart disease yes (vs. no)

0.042

0.001–2.783

0.138

   

History of smoking yes (vs. no)

1.002

0.554–1.812

0.995

   

History of alcohol consumption yes (vs. no)

0.977

0.534–1.787

0.941

   

Hepatitis B virus infection yes (vs. no)

0.696

0.310–1.562

0.380

   

Liver cirrhosis, yes (vs. no)

0.481

0.189–1.221

0.124

   

Ascites, yes (vs. no)

0.598

0.082–4.372

0.613

   

CA-19-9 (U/ml)

1.002

1.001–1.003

0.000

1.002

1.001–1.003

0.000

AFP (U/ml)

1.004

0.999–1.010

0.105

   

CEA (U/ml)

1.002

0.999–1.005

0.169

   

Neutrophil count (109/L)

1.334

1.145–1.554

0.000

1.207

0.993–1.467

0.059

Lymphocyte count (109/L)

0.930

0.765–1.130

0.465

   

Platelet count (109/L)

1.004

1.000–1.008

0.042

1.001

0.996–1.005

0.769

HGB (g/L)

0.987

0.973–1.001

0.062

0.991

0.970–1.012

0.389

ALT (U/L)

1.000

0.995–1.004

0.819

   

AST (U/L)

1.006

1.000–1.012

0.035

1.003

0.996–1.010

0.432

TBIL (umol/L)

1.001

0.997–1.005

0.546

   

ALB (g/L)

0.970

0.922–1.022

0.251

   

Tumor diameter (cm)

1.070

0.977–1.172

0.143

   

Tumor number multiple (vs. single)

1.662

0.582–4.747

0.342

   

Pathological differentiation

 Poorly differentiated

-

-

-

   

 Moderately differentiated

0.417

0.213–0.816

0.011

0.344

0.159–0.744

0.007

 Well differentiated

0.502

0.200–1.259

0.142

0.840

0.317–2.548

0.926

 TNM stage >II (vs. ≤II)

3.912

2.138–7.156

0.000

2.337

0.850–6.428

0.100

 Lymphatic metastasis, yes (vs. no)

4.331

2.225–8.431

0.000

1.804

0.683–4.765

0.234

 Satellite foci yes (vs. no)

2.535

1.122–5.725

0.025

0.414

0.136–1.261

0.121

 Microscopic microvascular invasion yes (vs. no)

1.574

0.774–3.200

0.210

   

 Liver capsule invasion yes (vs. no)

1.929

1.020–3.646

0.043

1.244

0.464–3.337

0.664

 Microscopic perineural invasion yes (vs. no)

1.579

0.775–3.219

0.208

   

 Lymph node dissection yes (vs. no)

1.420

0.791–2.550

0.240

   

Number of lymph node dissection

 0

      

 1–5

1.480

0.805–2.719

0.207

   

 ≥6

1.132

0.339–3.775

0.840

   

Operative time (min)

1.002

0.999–1.005

0.267

   

Surgical margin R1 (vs. R0)

0.936

0.288–3.045

0.913

   

LH (vs. OH)

0.789

0.380–1.642

0.527

   
  1. Bold indicates statistical significance
  2. BMI body mass index, ASA American Society of Anesthesiology, CA-19-9 cancer antigen 19-9, AFP alpha fetoprotein, CEA carcinoembryonic antigen, HGB hemoglobin, ALT alanine aminotransferase, AST aspartate aminotransferase, TBIL total bilirubin, ALB albumin, LH laparoscopic hepatectomy, OH open hepatectomy