Relationship between achieved blood pressure, dietary habits and cardiovascular disease in hypertensive patients treated with olmesartan: the OMEGA study
Hypertension Research, 07/25/2012
Teramoto T et al. – The severity of hypertension (achieved blood pressure) is associated with the incidence of cardiovascular disease (CVD), and the results of this study suggest that tight blood pressure control and salt restriction are important for preventing stroke.Methods
- A prospective cohort study with a 3–year follow–up was conducted in 14721 olmesartan–naive outpatients (mean age: 64.9 years, 49.6% women) with essential hypertension.
- The association of CVD with achieved blood pressure, dietary habits and MetS was investigated by Cox proportional hazards analysis.
- There were 3059 patients (31.8%) with MetS (Japanese criteria) among 9625 evaluable patients.
- The mean baseline blood pressure was 157.4/88.8mmHg, which decreased to 134.0/76.1mmHg during treatment (P<0.0001).
- The annual incidence of CVD was 7.15 per 1000 persons during the study period.
- When the achieved blood pressure was stratified according to the Japanese Society of Hypertension Guidelines for the Management of Hypertension (JSH 2009), the risk of CVD increased significantly along with the severity of hypertension (P<0.0001), especially the risk of stroke.
- Investigation of dietary habits revealed a significant association between salt intake and the risk of stroke.
- Higher salt intake was associated with a significantly higher risk of stroke than lower salt intake (hazard ratio, 1.897; 95% confidence interval, 1.003–3.590).
- Blood pressure was well controlled in both patients with and without MetS, and there was no significant difference in the incidence of events between the two groups.