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Table 2 Risk of bias assessment of observational studies

From: Efficacy and safety of tension band wiring versus plate fixation in olecranon fractures: a systematic review and meta-analysis

Study

Selection

Outcome

 

Exposed cohort

No exposed cohort

Ascertainment of exposure

Outcome of interest

Comparability

Assessment of outcome

Length of follow-up

Adequacy of follow-up

Total score

Benedikt et al. [10]

*

*

*

*

**

*

*

*

9

Luigi et al. [11]

*

*

*

*

*

*

*

*

8

Gagan et al. [12]

*

*

*

*

*

*

*

*

8

Chen et al. [14]

*

*

*

*

*

*

*

*

8

Lu et al. [15]

*

*

*

*

*

*

–

*

7

Sui et al. [16]

*

*

*

*

*

*

–

*

7

Wang et al. [17]

*

*

*

*

*

*

*

*

8

Xu et al. [18]

*

*

*

*

*

*

*

*

8

Yu et al. [19]

*

*

*

*

*

*

*

*

8

Zhang et al. [20]

*

*

*

*

*

*

*

*

8

Zhang et al. [21]

*

*

*

*

*

*

*

*

8

Zhang et al. [22]

*

*

*

*

*

*

*

*

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