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Table 2 Quality assessment based on the NOS for observational studies

From: Robotic versus laparoscopic Gastrectomy for gastric cancer: a systematic review and updated meta-analysis

Author

Selection (Out of 4)

Comparability (Out of 2)

Outcomes (Out of 3)

Total (Out of 9)

â‘ 

â‘¡

â‘¢

â‘£

⑤

â‘¥

⑦

Pugliese

*

*

*

*

**

*

*

*

9

Kim MC

*

*

*

*

*

*

  

6

Kim KM

*

*

*

*

*

*

  

6

Son SY

*

*

*

*

**

*

  

7

Kang

*

*

*

*

*

*

  

6

Zhang

*

*

*

*

**

*

  

7

Hyun

*

*

*

*

*

*

  

6

Son T

*

*

*

*

**

*

*

*

9

Noshiro

*

*

*

*

**

*

  

7

Huang

*

*

*

*

**

*

  

7

Zhou

*

*

*

*

**

*

*

*

9

Liu

*

*

*

*

**

*

  

7

Lee

*

*

*

*

*

*

*

*

8

Han

*

*

*

*

**

*

*

*

9

Park

*

*

*

*

*

*

  

6

Suda

*

*

*

*

*

*

 

*

7

Kim HI

*

*

*

*

*

*

  

6

Shen

*

*

*

*

**

*

  

7

Cianchi

*

*

*

*

*

*

  

6

  1. â‘ representativeness of exposed cohort
  2. â‘¡selection of nonexposed cohort
  3. â‘¢ascertainment of exposure
  4. â‘£outcome not present at the start of the study
  5. ⑤assessment of outcomes
  6. â‘¥length of follow-up
  7. ⑦adequacy of follow-up
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BMC Surgery

ISSN: 1471-2482

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