• J Natl Med Assoc · Apr 2006

    Randomized Controlled Trial Multicenter Study Comparative Study

    Irbesartan/HCTZ fixed combinations in patients of different racial/ethnic groups with uncontrolled systolic blood pressure on monotherapy.

    • Elizabeth O Ofili, Keith C Ferdinand, Elijah Saunders, Joel M Neutel, George L Bakris, William C Cushman, James R Sowers, and Michael A Weber.
    • Clinical Research Center, Morehouse School of Medicine, Atlanta, GA 30310, USA. eofili@msm.edu
    • J Natl Med Assoc. 2006 Apr 1; 98 (4): 618626618-26.

    AbstractThe IrbesartaN/hydroChlorothiazide (HCTZ) bLood pressUre reductionS In diVErse patient populations (INCLUSIVE) trial was a multicenter, prospective, open-label, single-arm study evaluating the efficacy and safety of irbesartan/HCTZ fixed combinations in patients > or = 18 years old with uncontrolled systolic blood pressure (SBP, 140-159 mmHg; 130-159 mmHg for type-2 diabetes mellitus patients) after > or = 4 weeks of antihypertensive monotherapy. This analysis focused on different racial/ethnic subgroups. Treatment was sequential: placebo (4-5 weeks), HCTZ 12.5 mg (two weeks), irbesartan/HCTZ 150/12.5 mg (eight weeks) and irbesartan/HCTZ 300/25 mg (eight weeks). Overall, 515 Caucasians, 191 African Americans and 119 Hispanics/Latinos completing placebo treatment were enrolled. Mean SBP changes from baseline (placebo treatment end) to week 18 were -21.5 +/- 13.8 mmHg for Caucasians, -20.7 +/- 16.5 mmHg for African Americans and -22.9 +/- 13.2 mmHg for Hispanics/Latinos, respectively (p<0.001 for each). Mean diastolic BP (DBP) changes were statistically significant (p<0.001) and similar among racial/ethnic subgroups. By week 18, 70% (95% CI, 66%, 74%) of Caucasian, 66% (95% CI, 59%, 74%) of African-American and 65% (95% CI, 57%, 74%) of Hispanic/Latino patients achieved dual SBP/DBP goal. Treatments appeared to be well tolerated. In conclusion, irbesartan/HCTZ treatment provided SBP/DBP goal attainment in approximately two-thirds of Caucasian, African-American and Hispanic/Latino patients with SBP uncontrolled on antihypertensive monotherapy.

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