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Table 2 Assessment of risk of bias of observational studies with the Newcastle-Ottawa Scale

From: Post-orthodontic lower incisor inclination and gingival recession—a systematic review

 

Allais and Melsen [20]

Villard and Patcas [22]

Design

Cohort study

Cohort study

Selection

Representativeness of the study group

*

*

Selection of the controls

*

*

Ascertainment of exposure

*

*

Definition of baseline characteristics

 

*

Comparability

Comparability for gingival recessions

*

*

Comparability for incisor inclination

*

 

Outcome

Assessment of outcome

*

*

Adequacy of follow-up

 

*

Attrition during follow-up

*

*

Total

7

8