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Table 5 Univariate and multivariate analyses of the risk factors for overall survival in the PSM cohort

From: Surgical and oncological outcomes of robotic- versus laparoscopic-assisted distal gastrectomy with D2 lymphadenectomy for advanced gastric cancer: a propensity score‑matched analysis of 1164 patients

Variables

Univariate

P

Multivariate

P

 

HR

95% CI

 

HR

95% CI

 

Age, years

  

0.036

  

0.065

 < 65

Reference

  

Reference

  

 ≥ 65

1.324

1.018–1.721

 

1.285

0.985–1.676

 

Gender

  

0.966

   

 Female

Reference

     

 Male

1.006

0.759–1.333

    

Postoperative morbidity

  

0.321

   

 No

Reference

     

 Yes

0.785

0.432–1.325

    

BMI, kg/m2

  

0.070

  

0.064

 < 25

Reference

  

Reference

  

 ≥ 25

0.686

0.456–1.032

 

0.670

0.438–1.024

 

ASA score

  

0.912

   

 0–1

Reference

     

 ≥ 2

1.056

0.382–2.912

    

Histology type

  

0.146

   

 Well/moderately

Reference

     

 Poorly/undifferentiated

1.378

0.890–2.140

    

Tumor size, cm

  

0.049

  

0.917

 < 4

Reference

  

Reference

  

 ≥ 4

1.300

1.002–1.688

 

0.986

0.752–1.292

 

Pathologic T stage

  

0.001

  

0.011

 T2

Reference

     

 T3-T4a

2.863

1.538–5.327

 

3.316

1.319–8.342

 

Pathologic N stage

  

0.028

  

0.042

 N negative

Reference

     

 N positive

2.350

1.095–5.042

 

2.458

1.338–5.922

 

 Pathologic TNM stage

  

0.000

  

0.012

 IB

Reference

  

Reference

  

 IIA-IIIC

3.709

1.945–7.076

 

3.804

1.420–15.249

 

 Surgical procedure

  

0.521

   

 RADG

Reference

     

 LADG

0.918

0.707–1.192

    
  1. RADG robotic-assisted distal gastrectomy, LADG laparoscopic-assisted distal gastrectomy, BMI body mass index, HR hazard ratio, ASA American Society of Anesthesiologists, CI confidence interval