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  • Title: Quality of life comparison between bisoprolol and nifedipine retard in hypertension.
    Author: de Hoon JN, Vanmolkot FH, van de Ven LL, Van Bortel LM.
    Journal: Cardiovasc Drugs Ther; 1997 Jul; 11(3):465-71. PubMed ID: 9310275.
    Abstract:
    Quality of life with the selective beta1-blocker bisoprolol and the calcium channel blocker nifedipine as a retard formulation was compared in patients with essential hypertension. A multicenter randomized, double-blind, two-way, crossover study design was used. After a placebo run-in period (4-6 weeks), during which all antihypertensive therapy was withdrawn, 82 patients were randomized. During the active treatment periods (8 weeks each), patients received either bisoprolol once daily or nifedipine retard twice daily, using the double-dummy technique. A washout period (4-6 weeks) separated the treatment periods. Data at baseline (at randomization) and at the end of each treatment period were compared. Seventy-five patients completed the study. Blood pressure (168 +/- 2/103 +/- 1 mmHg) decreased (p < 0.001) similarly with bisoprolol (153 +/- 2/90 +/- 1 mmHg) and nifedipine (154 +/- 2/90 +/- 1 mmHg). Compared with baseline values, none of the quality of life variables investigated changed during bisoprolol or nifedipine retard use. Neither in the intention-to-treat nor the efficacy analysis were differences between bisoprolol and nifedipine found in quality of life variables, such as the Health Status Index, somatic symptoms, anxiety, depression, total psychiatric morbidity, cognitive symptoms, and hostility score. Only in the efficacy analysis did Health Status Index tend to be better (p = 0.055) during nifedipine intake when compared with bisoprolol. This trend was not present in the intention-to-treat analysis. The number of dropouts during bisoprolol (n = 2) and nifedipine (n = 3) treatment, and the number of patients reporting side effects (21% and 16%, respectively) did not differ (p = 0.64) between both treatments. It can be concluded that at equipotent antihypertensive dosages, an 8-week treatment period with the selective beta1-blocker bisoprolol or the calcium antagonist nifedipine as a retard formulation does not result in any difference in quality of life variables. It is not clear whether the trend of Health Status Index to become better during nifedipine intake, which was only found in the efficacy analysis and not in the intention-to-treat analysis, is of clinical relevance.
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