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Table 3 Methodological quality assessment of the selected nonrandomized studies

From: Comparison of minimally invasive percutaneous fixation and open reduction internal fixation for patella fractures: a meta-analysis

Study, year of publication

Bias due to confounding

Bias in selection of participants

Bias in classification of interventions

Bias due to deviations from intended interventions

Bias due to missing data

Bias in measurement of outcomes

Bias in selection of reported results

Overall risk of bias judgment

Vicenti et al., 2020 [10]

Low

Low

Low

Low

Low

Moderate

Low

Moderate

Chiang et al., 2011 [20, 25]

Low

Moderate

Low

Moderate

Low

Moderate

Moderate

Moderate