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Table 2 Newcastle-Ottawa Scale of observational studies

From: Proximal fibular osteotomy versus high tibial osteotomy for treating knee osteoarthritis: a systematic review and meta-analysis

Study

Selection

Outcome

Exposed cohort

Noexposed cohort

Ascertainment of Exposure

Outcome of Interest

Comparability

Assessment of outcome

Length of follow-up

Adequacy of follow-up

Total score

Hu et al. [17]

*

*

*

*

*

*

*

*

8

Cai et al. [18]

*

*

*

*

*

*

*

 

7

Ahmed et al. [22]

*

*

*

*

*

*

  

6

Wang et al. [25]

*

*

*

*

*

*

*

 

7

Qiu et al. [30]

*

 

*

*

 

*

*

 

5

Wang et al. [34]

*

*

*

*

*

*

*

 

7

Yu et al. [29]

*

*

*

*

*

*

*

 

7

Yu et al. [38]

*

*

*

*

*

*

*

 

7

An et al. [39]

*

*

*

*

*

*

*

*

8

  1. *Risk of bias was assessed using the Newcastle–Ottawa Scale. A higher overall score indicates a lower risk of bias; a score of 5 or less (out of 9) corresponds to a high risk of bias
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Journal of Orthopaedic Surgery and Research

ISSN: 1749-799X