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Table 1 Newcastle–Ottawa quality assessment of the studies included in the systematic review

From: A meta-analysis of risk factors for non-superficial surgical site infection following spinal surgery

Study

Quality Assessment of Case–control Studies with NOS

Selection

Comparability

Exposure

NOS QS

1

2

3

4

5

6

7

8

9

LIM, S

*

 

*

*

*

 

*

*

 

6

Zhang, Z

*

*

 

*

*

*

*

*

 

7

Rao, S B

*

 

*

*

 

*

*

*

*

7

Pennington, Z

*

 

*

  

*

*

 

*

5

Kim, J

*

*

*

*

*

*

*

*

 

8

Seki, T

*

*

 

*

*

 

*

*

 

6

Kim, B D

*

 

*

*

 

*

*

 

*

6

Miller, E M

*

*

 

*

 

*

*

*

*

7

De la Garza-Ramos, R

*

*

 

*

*

 

*

 

*

6

Wang, S

*

*

*

*

*

*

 

*

*

8

White, SJW

*

 

*

*

 

*

*

*

 

6

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BMC Surgery

ISSN: 1471-2482

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