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Table 1 Quality assessment criteria for RCTs

From: Does malalignment affect patient reported outcomes following total knee arthroplasty: a systematic review of the literature

Authors

Quality assessment

Judgment on risk of bias

Was the allocation sequence generated adequately?

Was the allocation of treatment adequately concealed

Did researchers rule out any unintended exposure that might bias results?

Were participants analysed within the groups they were originally assigned to?

Was the length of follow-up different between the groups

Were the outcome assessors blinded to the intervention or exposure status of participants?

Were the potential outcomes pre-specified by the researchers? Are all pre-specified outcomes reported?

If attrition was a concern were missing data handled appropriately?

Were outcomes assessed using valid and reliable measures across all study participants?

Blakeney et al. (2014)

Yes

No

Yes

Yes

No

No

Yes

Yes

Yes

Low risk

Choong et al. (2012)

Yes

No

Yes

Yes

No

No

Yes

Yes

Yes

Low risk

Huang et al. (2012)

Yes

No

Yes

Yes

No

No

Yes

Yes

Yes

Low risk

Lutzner et al. (2010)

Yes

No

Yes

Yes

No

No

Yes

Yes

Yes

Low risk

Gothesen et al. (2014)

Yes

Yes

Yes

Yes

No

Yes

Yes

Yes

Yes

Low risk

  1. Assessed using AHRQ design specific scale (Stang 2010)