Study design | Rank in evidence hierarchy | Â | Therapeutic cases | Â | Â |
---|---|---|---|---|---|
 |  | Antibiotics | NSAIDs | SSRIs | Total |
Cohort | 4 | 5 | 4 | 1 | 10 |
Case control | 5 | 2 | 3 | 2 | 8 |
PEM* | 6 | 2 | 9 | 4 | 15 |
National ADR databases | 7 | 7 | 14 | 11 | 32 |
Case series | 7 | 2 | 3 | 1 | 6 |
Case reports | 7 | 5 | 2 | 1 | 8 |
Total number of studies | Â | 23 | 36 | 20 | 79 |