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Journal of Preventive Medicine and Public Health 2006;39(3): 229-234.
The Incidence and Risk Factors of Hypertension that Developed in a Male-workers' Cohort for 3 Years.
Hyun Ju Seo, Soo Geun Kim, Chong Soon Kim, Yun Kyun Chang, Il Geun Park
1Radiation Health Research Institute, Korea Hydro and Nuclear Power CO.,LTD, Korea. ksg6201@khnp.co.kr
2Graduate School of Korea University, Department of Public Health, Korea.
OBJECTIVES: Cardiovascular disease is one of the main causes of death and morbidity in Korea. In this study, the prevalence and incidence of developing hypertension in a male-workers' cohort were investigated during 3-years follow-up with a view to find the risk factors that affected the development of hypertension. METHODS: Among the 5,374 people who participated in a routine health check up, 3,852 people with normal blood pressure and who had no history of hypertension were prospectively followed up for 3 years. The classification of hypertension was based on the JNC7 report (the Seventh Report of the Joint National Committee on Prevention, Detection, Evaluation, and Treatment of High Blood Pressure). Life style factors and underlying diseases that were related to the risk factors of hypertension were collected by using a self-report questionnaires via the internet. RESULTS: The prevalence of hypertension was 28.3% (1,520/5,374) at the first screening (2001). It was found that the incidence in 2004 of hypertension for the follow-up subjects (3,711) who had normal blood pressure in 2001 was 7.6 per 100 person-year. Multiple logistic regression analysis of the variables related to the risk factors of hypertension was carried out. The relative risks were 1.037 (95% CI=1.022-1.053) as the age increased 1 year and 1.039 (95% CI=1.023-1.055) as the body mass index increased 1 kg/m2. The relative risk for the prehypertensive group was 2.501(95% CI=1.986-3.149) compared to the normotensive group. These results showed that age, body mass index and the baseline blood pressure were significantly related to the incidence of hypertension. CONCLUSIONS: The incidence of hypertension was 7.6 per 100 person-year during follow-up. It was concluded that the risk factors for developing hypertension in the short-term were age, BMI, and prehypertension; Especially, this showed that it is necessary for prehypertensives to manage their body weight and blood pressure to prevent hypertension in middle-age by modifying their life style.
Key words: Hypertension; Incidence; Risk factors
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