Table 2. Study Quality Assessment .

References [19-23]

Source

Research question clearly stated?

Population clearly defined?

Subjects recruited from same/similar populations?

Inclusion and exclusion criteria clearly defined?

Sample size justification, power description, or variance estimates provided?

Exposures of interest measured prior to outcomes?

Exposure measures clearly defined?

Outcome measures clearly defined?

Confounding variables adjusted for statistically?

Statistical methods well-described?

Results well described?

Total

Ghanem et al. 2020 [19]

Yes

Yes

Yes

No

No

No

No

No

No

No

Yes

4/11

Zhang et al. 2019 [20]

Yes

Yes

Yes

Yes

Yes

Yes

No

Yes

Yes

Yes

Yes

10/11

Zhang et al. 2018 [21]

Yes

Yes

Yes

Yes

Yes

Yes

No

Yes

Yes

Yes

Yes

10/11

Elliot et al. 2016 [22]

Yes

Yes

Yes

Yes

No

Yes

No

No

No

No

No

5/11

Cote et al. 2015 [23]

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

11/11