Design, statistical analysis and sample size calculation of dose response study of telmisartan and hydrochlorothiazide.
Many patients with hypertension take some antihypertensive drugs with complementary mechanisms of action to lower their blood pressure and achieve the therapeutic goals reducing the risk of cardiovascular events. Telmisartan, angiotensin II receptor blocker, and hydrochlorothiazide, diuretic are two antihypertensive drugs that have a well-recognized clinical efficacy. Their combination is expected to be one of the most appropriate therapies for hypertensive patients. However there is no information to show the effective dose combination of two drugs for the Japanese patients with mild to moderate hypertension. Therefore, the prospective, randomized, double-blinded study was planed for showing the dose response surface of two components. The 3 by 3 factorial design was applied for this purpose and the approach for calculating sample size was proposed. This study was registered with ClinicalTrial.gov (NCT00153049).
Horie
Yoshiharu
Y
Biostatistics Division, Graduate School of Kitasato University, 5-9-1 Shirokane, Minato-ku, Tokyo 108-8641, Japan. horiey@kaw.boehringer-ingelheim.com
Higaki
Jitsuo
J
Takeuchi
Masahiro
M
D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D047228:Angiotensin II Type 1 Receptor Blockers / Q000008:administration & dosage / Q000627:therapeutic use*; D001562:Benzimidazoles / Q000008:administration & dosage / Q000627:therapeutic use*; D001565:Benzoates / Q000008:administration & dosage / Q000627:therapeutic use*; D004232:Diuretics / Q000008:administration & dosage / Q000627:therapeutic use*; D004305:Dose-Response Relationship, Drug; D004311:Double-Blind Method; D004359:Drug Therapy, Combination; D005260:Female; D006801:Humans; D006852:Hydrochlorothiazide / Q000008:administration & dosage / Q000627:therapeutic use*; D006973:Hypertension / Q000188:drug therapy*; D008297:Male; D008875:Middle Aged; D012107:Research Design; D018401:Sample Size; D013223:Statistics as Topic / Q000379:methods; D000077333:Telmisartan
D047228:Angiotensin II Type 1 Receptor Blockers; D001562:Benzimidazoles; D001565:Benzoates; D004232:Diuretics; D006852:Hydrochlorothiazide; D000077333:Telmisartan