BMC Clinical Pharmacology

Table 2 The analysed studies categorised by study design

From: Information about ADRs explored by pharmacovigilance approaches: a qualitative review of studies on antibiotics, SSRIs and NSAIDs

Study design	Rank in evidence hierarchy		Therapeutic cases
		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		23	36	20	79

*Prescription Event Monitoring Studies

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