Table 2 Assessment of risk of bias of studies and quality according to the newcastle otawa scale

Autor/ Ano

Selection

Comparability

Outcome

Total

Adequate definition

Representativeness of the cases

Selection of controls

Definition of controls

Comparability of cases and controls on the basis of the design or analysis

Ascertainment of exposure

Same method of ascertainment for cases and controls

Non-Response rate

9 ★