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Table 3 Newcastle-Ottawa score quality assessment scale for cohort studies

From: Hepatectomy for liver metastases from gastric cancer: a systematic review

Study

Selection

Comparability

Outcome

Total star

1

2

3

4

1a

1b

1

2

3

Chen 2013

a*

a*

a*

a*

a*

b*

d

b

d

6

Cheon 2008

a*

a*

a*

a*

a*

b*

d

a*

a*

8

Dittmar 2012

a*

a*

a*

a*

-

-

d

a*

a*

6

Makino 2010

a*

a*

a*

a*

a*

b*

d

a*

d

7

Miki 2012

a*

a*

a*

a*

a*

-

d

a*

d

6

Tiberio 2009

a*

a*

a*

a*

-

-

d

a*

a*

6

Tiberio 2015

a*

a*

a*

a*

-

-

d

a*

a*

6

Ueda 2009

a*

a*

a*

a*

-

-

d

a*

a*

6

  1. -, no description or comparability