Table 1.

The score of the studied based on National Institutes of Health Quality Assessment Tool for Observational Cohort and Cross-Sectional Studies.

Author/studies	Q1	Q2	Q3	Q4	Q5	Q6	Q7	Q8	Q9	Q10	Q11	Q12	Q13	Q14
Boskabady and Karimian	×	✓	✓	✓	✓	NA	✓	✓	✓	✓	✓	NR	✓	✓
Tootoonchi	×	✓	✓	✓	✓	NA	CD	×	✓	NA	✓	NR	✓	✓
Hatami et al.	✓	✓	✓	✓	NR	NR	✓	✓	✓	NA	✓	CD	✓	✓
Habibi et al.	✓	✓	✓	✓	✓	NA	✓	✓	✓	NA	✓	NR	✓	✓
Zohal and Hasheminasab	✓	✓	✓	✓	✓	NA	NR	✓	✓	NA	✓	NR	✓	✓
Ghazi et al.	✓	✓	✓	✓	✓	NA	✓	✓	✓	NA	✓	NR	✓	✓
Masjedi et al.	×	✓	✓	✓	✓	NA	✓	✓	✓	NA	✓	NR	✓	✓
Abbasi	×	✓	✓	✓	✓	NA	✓	✓	✓	NA	✓	NR	✓	✓
Bazzazi et al.	×	✓	✓	✓	✓	NA	NR	✓	✓	NA	✓	NR	✓	✓
Karimi et al.	×	✓	✓	✓	✓	NA	✓	✓	✓	NA	✓	NR	✓	✓
Bidad et al.	✓	NR	×	✓	✓	NA	✓	×	✓	NA	✓	NR	✓	✓
Shakurnia et al.	×	✓	✓	✓	✓	NA	NR	✓	✓	NA	✓	NR	✓	✓
Rahimi Rad et al.	×	✓	✓	✓	✓	NA	✓	✓	✓	NA	✓	NR	✓	✓
Fadaeizadeh et al.	✓	✓	✓	✓	✓	NA	✓	✓	✓	NA	✓	NR	✓	✓
Mohammadzadeh et al.	×	✓	✓	✓	✓	NA	✓	✓	✓	NA	✓	NR	✓	✓
Sahebi and Shabestray	×	✓	✓	✓	✓	NA	✓	✓	✓	NA	✓	NR	✓	✓
Rajaeifard et al.	✓	✓	✓	✓	✓	NA	NR	✓	✓	NA	✓	NR	✓	✓
Zobeiri	✓	✓	✓	✓	✓	NA	✓	✓	✓	NA	✓	NR	✓	✓
Tavacol et al.	×	✓	✓	✓	✓	NA	✓	✓	✓	NA	✓	NR	✓	✓
Hassanzadeh et al.	✓	✓	✓	✓	✓	NA	✓	CD	✓	NA	×	NR	✓	✓
Hajavi et al.	✓	✓	✓	✓	✓	NA	✓	✓	✓	NA	✓	NR	✓	✓
Gooya et al.	✓	✓	✓	✓	✓	NA	✓	✓	✓	NA	✓	NR	✓	✓
Farrokhi et al.	✓	✓	✓	✓	✓	NA	✓	✓	✓	NA	✓	NR	✓	✓
Nasiri Kalmarzi et al.	✓	✓	✓	✓	✓	NA	✓	✓	✓	NA	✓	NR	✓	✓
Ghozikali et al.	✓	✓	✓	✓	✓	NA	✓	✓	✓	NA	✓	NR	✓	✓
Zamanfar et al.	✓	✓	✓	✓	✓	NA	✓	✓	✓	NA	✓	NR	✓	✓
Mehravar et al.	✓	✓	✓	✓	✓	NA	✓	✓	✓	NA	✓	NR	✓	✓
Assadi et al.	✓	✓	✓	✓	✓	NA	✓	✓	✓	NA	✓	NR	✓	✓
Khazaei et al.	×	✓	✓	✓	✓	NA	✓	✓	✓	NA	✓	NR	✓	✓
Fazlollahi et al.	✓	✓	✓	✓	✓	NA	✓	✓	✓	NA	✓	NR	✓	✓