OBJECTIVE To compare the cost-effectiveness between Irbesartan combined with Extended Release Nifedipine or Hydrochlorothiazide in the treatment of the Pure Systolic Hypertension.

• 目的比较厄贝沙坦与硝苯地平缓释片或氢氯噻嗪片联合治疗单纯性收缩期高血压的经济效果。