Table 7. Top ten co-occurred keywords .
No | Author Keyword | Numbers | Rank | No | Author Keyword | Numbers | Rank |
1 | Iran | 131 | 1 | 8 | Validity | 17 | 6 |
2 | children | 37 | 2 | 9 | Education | 15 | 7 |
3 | Prevalence | 23 | 3 | 10 | Breast Cancer | 14 | 8 |
4 | Quality of Life | 23 | 3 | 11 | Epidemiology | 14 | 8 |
5 | Reliability | 22 | 4 | 12 | Pregnancy | 12 | 9 |
6 | Systematic Review | 19 | 5 | 13 | Tuberculosis | 12 | 9 |
7 | Meta-Analysis | 17 | 6 | 14 | Hypertension | 11 | 10 |