Research Article
Level of Evidence of Dental Research in Saudi Arabia (2000–2020)
Table 2
Classification of the extracted articles according to the design of the study.
| Study design | Frequency | (%) |
| Meta-analysis | 5 | 0.32 | Systematic reviews | 200 | 12.85 | Randomized controlled trials | 103 | 6.62 | Clinical trials | 75 | 4.81 | Cohort studies | 16 | 1.02 | Case-control studies | 24 | 1.54 | Cross-sectional studies | 1005 | 64.55 | Case reports | 119 | 7.64 | Case series | 10 | 0.64 | Total | 1557 | 100 |
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