This study will analyse the dose-dependent effect of olmesartan medoxomil on the change in arterial stiffness in subjects with hypertension and metabolic syndrome

Inclusion Criteria:

• Male and female outpatients
• Age greater than or equal to 18 years and less than or equal to 75 years
• Hypertension and metabolic syndrome defined, according to the ATP III/IDF 2005 and ESH/ESC 2007 definitions, as BP greater than or equal to 130/85 mmHg and <150/95 mmHg (i.e. untreated high normal BP or "low range" mild hypertension) and at least 2 of the following traits at:
• Abdominal obesity (waist circumference >102 cm for men and >88 cm for women)
• Triglyceride level greater than or equal to 150 mg/dL
• High density lipoprotein (HDL) <40 mg/dL for men and <50 mg/dL for women
• Fasting blood glucose greater than or equal to 110 mg/dL and <126 mg/dL (i.e. no type 2 diabetes)
• No anti-hypertensive treatment or treatment with only one anti-hypertensive medication within the last 3 months. Note: treatment with angiotensin II receptor blockers (ARB)or angiotensin-converting enzyme inhibitors (ACE) is not allowed within the last 6 months.

Exclusion Criteria:

• Pregnant or lactating female (prerequisite for female subjects of childbearing potential: adequate contraception)
• Type 1 and type 2 diabetes
• "High range" mild hypertension (i.e. systolic blood pressure [SBP]: 150 - <160 mmHg and /or diastolic blood pressure [DBP]: 95 - <100 mmHg)
• Moderate (SBP: 160 - 179 mmHg and DBP: 100 - 109 mmHg), severe (SBP: greater than or equal to 180 mmHg and/or greater than or equal to 110 mmHg), or resistant (hypertension resistant to treatment)hypertension
• Secondary hypertension of any aetiology, such as renal disease, pheochromocytoma, or Cushing's syndrome

De-identified individual participant data (IPD) and applicable supporting clinical trial documents may be available upon request at https://vivli.org/. In cases where clinical trial data and supporting documents are provided pursuant to our company policies and procedures, Daiichi Sankyo will continue to protect the privacy of our clinical trial participants. Details on data sharing criteria and the procedure for requesting access can be found at this web address: https://vivli.org/ourmember/daiichi-sankyo/

Studies for which the medicine and indication have received European Union (EU) and United States (US), and/or Japan (JP) marketing approval on or after 01 January 2014 or by the US or EU or JP Health Authorities when regulatory submissions in all regions are not planned and after the primary study results have been accepted for publication.

Formal request from qualified scientific and medical researchers on IPD and clinical study documents from clinical trials supporting products submitted and licensed in the United States, the European Union and/or Japan from 01 January 2014 and beyond for the purpose of conducting legitimate research. This must be consistent with the principle of safeguarding study participants' privacy and consistent with provision of informed consent.