Table 3 Type of manuscripts included and evidence level of different study types

Opinion piece/narrative review

54 (45.4%)

5

Case reports

26 (22%)

5

Case series

20 (17%)

4

Systematic reviews

6 (5%)

2

Case‒control studies

3 (2.5%)

4

Retrospective case series

3 (2.5%)

4

Cross-sectional

3 (2.5%)

4

Randomised controlled trials (RCT)

2 (1.7%)

2

Nonrandomised controlled trials (non-RCT)

1 (0.8%)

3

Cohort studies

1 (0.8%)

2

119 total

Median 4