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Table 2 Quality assessment of Case control and Cohort studies

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

Author

Quality assessment of case control studies

Is the case definition adequate?

Representativeness of the cases

Selection of controls

Definition of controls

Comparability of cases and controls on basis of design or analysis

Ascertainment of exposure

Same method of ascertainment for cases and controls

Non-Response rate

Total Newcastle Ottawa Scale (possible 9 starts)

Barrack et al. (2001)

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

8*

Bell et al. (2014)

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

8*

Czurda et al. (2010)

Yes

Yes

Yes

Yes

Yes

No

Yes

Yes

7*

Magnussen et al. (2011)

Yes

Yes

Yes

Yes

Yes

No

Yes

Yes

7*

Matziolis et al. (2010)

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

8*

Nicoll and Rowley (2010)

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

8*

Stulberg et al. (2008)

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

8*

  1. Assessed using the Ottawa-Newcastle score (Viswanathan et al. 2008a)
  2. * Represents how many stars were achieved in the assessment of quality for each study
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