Abstract
To assess the equivalence of four antihypertensive treatments in patients with mild-to- moderate hypertension, and to compare the effects of those drugs on the subjective quality of life and clinical safety. 653 patients aged > or = 18 years with untreated hypertension were randomly allocated to receive a combination of two diuretics (altizide and spironolactone), a beta-blocker (bisoprolol), a calcium antagonist (verapamil), or an angiotensin converting enzyme (ACE) inhibitor (enalapril). Follow-up lasted for 1 year. A composite outcome of the following measures was used to define success: attendance at the 12-month visit; at least nine supine DBP measurements during the study; and median supine DBP < 90 mmHg and a reduction of at least 10 mmHg compared with the baseline value. Failure was defined as one or more of those criteria not being fulfilled. Equivalence was concluded if the 95% confidence interval for the success rates differed between two groups by less than +/- 10%. Clinical safety and subjective quality of life were also assessed. No statistically significant differences in the change in DBP or systolic blood pressure were observed between the groups. The success rates were 43.9, 42.0, 32.5 and 43.9% in diuretic, b...Continue Reading
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