Table 2 The Quality Assessment for the Seven Studies Involving Nonrandomized Comparison of MH and EH through the Newcastle-Ottawa Scale (NOS).

From: Mesohepatectomy Versus Extended Hemihepatectomies for Centrally Located Liver Tumors: A Meta-Analysis

Ref. Year

NOS Quality Assessment

Selection

Comparability

Exposure

Total

Wu8

3

2

2

7

Scudamore9

3

2

1

6

Qiu1

3

2

1

6

Chen6

4

2

3

9

Yang7

3

2

2

7

Hu4

3

2

2

7

Cheng5

3

2

3

8

Average

3.143

2

2

7.143

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