Table 4: Newcastle-Ottawa quality assessment scale cohort studies.

Autor,

year

Selection

Comparability

Outcome

Representativeness

of the exposed

cohort

Selection of

non-exposed

cohort

Ascertainment

of exposure

Demonstration

that the

outcome

was not

present

at the start

of the study

Comparability

of cohorts

on the basis

of design

and analysis

Assessment

of outcome

Length of

follow-up

Adequacy

of follow up

Kalem,

et al.

2018

—

*

*

*

**

*

—

Does not apply

O’Connor,

et al.

2014

*

*

*

*

**

*

*

Does not apply

Erdem,

et al.

2014

*

*

*

*

*

*

*

Does not apply

Zhang,

et al.

2020

—

*

*

*

**

*

*

Does not apply

Yang,

et al.

2020

—

*

*

*

—

*

*

Does not apply

Neumann,

et al.

2021

*

*

*

*

**

*

*

Does not apply

Maximum score for «Selection» domain: ****,

Maximum score for «Comparability» domain: **,

Maximum score for «Outcome» domain: **