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837 PREVALENCE, AWARENESS, TREATMENT AND CONTROL OF HYPERTENSION IN ELDERLY CHINESE

Objectives: We studied the prevalence, awareness, treatment and control of hypertension in an elderly Chinese population. Methods: The study subjects (age ≥ 60 years) were recruited in a suburb town of Shanghai from 2006 to 2008. We measured blood pressure 3 times consecutively using a validated Omron 7051 oscillometric device. We defined hypertension as a blood pressure of at least 140 mmHg systolic or 90 mmHg diastolic, or as the use of antihypertensive drugs. Results: The 3949 participants (mean age 68.3 years) included 55.3% women, 30.6% overweight (BMI 25.0-29.9 kg/m2) and 4.6% obese subjects (BMI≥30 kg/m2), and 9.3% heavy drinkers (≥300 g/week). The prevalence of hypertension was 59.4%. In hypertensive patients (n = 2345), the awareness, treatment and control (<140/90 mm Hg) rates were 72.5%, 65.8% and 24.4%, respectively. In treated hypertensive patients (n = 1542), the control rate was 37.1% overall and 36.7% and 37.3% in patients on monotherapy (n = 1157, 313 on calcium channel blockers) and fixed low-dose combination of thiazide with reserpine or clonidine (n = 414), respectively. In stepwise logistic regression, the prevalence of uncontrolled hypertension was higher with older age (+10 years, odds ratio [OR] 1.19, P = 0.03), female sex (OR 1.40, P = 0.01), overweight/obesity (OR 1.40, P = 0.004), and heavy drinking (OR 2.18, P = 0.0007). Conclusions: In elderly Chinese, the prevalence of hypertension is high. In spite of a reasonably high awareness and treatment rate, the control rate remains low due to under-dosing and unhealthy lifestyle.