Table 1. Assessment for article quality.

Reviewer : 1 □ 2 □	Articles
1 st step: Decision after reading the title and abstract.	1	2	3	4	5
	Reject □ Accept □	Reject □ Accept □	Reject □ Accept □	Reject □ Accept □	Reject □ Accept □
2 nd Step: Complete the following when the entire article is read.
Research question
Has the research aim been explained sufficiently and clearly?
Has the population study been clearly defined?
Have the outcomes been considered clearly?
Are the time and location boundaries explained?
Sampling
Has the sample size been appropriately defined?
Was random sampling performed?
Do selected patient characteristics correspond to the defined population?
Measurements
Were valid and reliable tools used?
Were identical tools used?
Did a trained interviewer gather data?
Analysis
Was subgroup analysis performed?
Was there a suitable analysis method?
Total score
Final decision	Reject □ Accept □	Reject □ Accept □	Reject □ Accept □	Reject □ Accept □	Reject □ Accept □

If an article has a considered character, it will be assigned 1 point.

If an article has total score of more than 6, it will be accepted and entered in the next step.