Ialt 697 patienter randomiseredes i forholdet 2: 1 til irbesartan/ hydrochlorothiazid 150 mg/ 12, 5 mg eller irbesartan 150 mg, og med systematisk titrering (inden evaluering af respons på den lavere dosis) efter 1 uge til henholdsvis irbesartan/ hydrochlorothiazid 300 mg/ 25 mg eller irbesartan 300 mg.
A total of 697 patients were randomized in a 2:1 ratio to either irbesartan/ hydrochlorothiazide 150 mg/ 12.5 mg or to irbesartan 150 mg and systematically force-titrated (before assessing the response to the lower dose) after one week to irbesartan/ hydrochlorothiazide 300 mg/ 25 mg or irbesartan 300 mg, respectively.