Level of Evidence of Dental Research in Saudi Arabia (2000–2020)

<table class="table-group" id="tab1"><tr><td><table class="table"><tr><td class="thead-hr" colspan="2"><hr/></td></tr><tr class="thead"><td class="align_left">Level</td><td class="align_center">Type of study</td></tr><tr><td class="thead-hr" colspan="2"><hr/></td></tr><tr><td class="align_left">I</td><td class="align_center">Meta-analysis, systematic reviews of RCTs, randomized controlled clinical trials (RCTs)</td></tr><tr><td class="align_left">II</td><td class="align_center">Systematic review of cohort studies, systematic reviews of clinical trials, individual cohort studies, individual clinical trials, quasiexperimental</td></tr><tr><td class="align_left">III</td><td class="align_center">Systematic review of case-control studies, individual case-control studies</td></tr><tr><td class="align_left">IV</td><td class="align_center">Systematic reviews of mixed low evidence level studies.<br/>Case series, case reports, and cross-sectional studies</td></tr><tr><td class="align_left">V</td><td class="align_center">Expert opinions without explicit critical appraisal, experimental research, animal studies, reviews</td></tr><tr class="table-tr"><td colspan="2"><hr class="tbody-hr"/></td></tr></table></td></tr></table>

<div>The modified Oxford’s level of evidence scale.</div>

International Journal of Dentistry

tab1

Table 1

Table 1: Level of Evidence of Dental Research in Saudi Arabia (2000–2020) 