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KMID : 0371020020350020141
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Journal of Preventive Medicine and Public Health
2002 Volume.35 No. 2 p.141 ~ p.146
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Incidence of Hypertension in a Cohort of an Adult Population
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Chun Byung-Yeol
Kam Sin
Oh Hee-Sook
Lee Sang-Won
Woo Kuck-Hyeun
Ahn Moon-Young
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Abstract
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Objectives: This study was performed in order to assess the incidence of hypertension based on two-years follow-up of a rural hypertension-free cohort in Korea.
Methods: The study cohort comprised 2,580 subjects aged above 20 (1,107 men and 1,473 women) of Chung-Song County in Kyungpook Province judged to be hypertensive-free at the baseline examination in 1996. For each of two examinations in the
two-year follow-up, those subjects free of hypertension were followed for the evelopment of hypertension to the next examination one year (1997) and two years later (1998). The drop-out rate was 24.7% in men and 19.6% in women. Hypertension was defined as follows 1) above mild hypertension as a SBP above 140 ㎜Hg or a DBP above 90 ㎜Hg, 2) above moderate hypertension as a SBP above 160 ㎜Hg or a DBP above 100 ㎜Hg or when the participant reported having used antihypertensive medication after beginning
this survey.
Results: The age-standardized incidence of above mild hypertension was 6 per 100 person years (PYS) in men and that of above moderate hypertension was 1.2. In women, the age-standardized rate for above mild hypertension was 5.7 and 1.5 for above
mild and moderate hypertension, respectively. However, the rates of incidence as calculated by the risk method were 4.8% and 1.0% in men and 4.6%, 1.2% in women, respectively. In both genders, incidence was significantly associated with advancing
age(p<0.01), In men, the incidences of above moderate hypertension by age group were 0.5 per 100 PYS aged 20-39, 0.7 aged 40-49, 1.7 aged 50-59, 3.6 aged 60-69, and 5.8 aged above 70(p<0.01). In women, those the incidence measured 0.6 per 100 PYS aged 20-39, 1.8 aged 40-49, 1.3 aged 50-59, 3.3 aged 60-69, and 5.6 aged above 70(p<0.01). After age 60, the incidence of hypertension increased rapidly.
Conclusions: The incidence data of hypertension reported in this study may serve as a reference data for evaluating the impact of future public efforts in the primary
prevention of hypertension in Korea.
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KEYWORD
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Incidence, Hypertension, Cohort studies
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