Systematic Review: Comparative Effectiveness of Angiotensin-Converting Enzyme Inhibitors and Angiotensin II Receptor Blockers
for Treating Essential Hypertension
Figure 3.Cough as an adverse event: angiotensin-converting enzyme (ACE) inhibitors versus angiotensin II receptor blockers (ARBs).
The first group is observational studies and the second group is randomized, controlled trials.