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HOME > Korean J Prev Med > Volume 30(2); 1997 > Article
Original Article Changes in blood pressure and determinants of blood pressure level and change in Korean adolescents.
Il Suh, Chung Mo Nam, Sun Ha Jee, Suk Il Kim, Young Ok Kim, Sung Soon Kim, Won Heum Shim, Chun Bae Kim, Kang Hee Lee, Jong Won Ha, Hyung Gon Kang, Kyung Won Oh
Journal of Preventive Medicine and Public Health 1997;30(2):308-326
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Many studies have led to the notion that essential hypertension in adults is the result of a process that starts early in life: investigation of blood pressure(BP) in children and adolescents can therefore contribute to knowledge of the etiology of the condition. a A unique longitudinal study on BP in Korea, known as Kangwha Children's Blood Pressure(KCBP) Study was initiated in 1986 to investigate changes in BP in children. This study is a part of the KCBP study. The purposes of this study are to show changes in BP and to determine factors affecting to BP level and change in Korean adolescents during age period 12 to 16 years. A total of 710 students(335 males, 375 females) who were in the first grade at junior high school(12 years old) in 1992 in Kangwha County, Korea have been followed to measure BP and related factors(anthropometric, serologic and dietary factors) annually up to 1996. A total of 562 students(242 males, 320 females) completed all five annual examinations. The main results are as follows: 1. For males, mean systolic diastolic BP at age 12 and 16 years old were 108.7 mmHg & 118.1 mmHg(systolic), and 69.5 mmHg & 73.4 mmHg(diastolic), respectively. BP level was the highest when students were at 15 years old. For females, mean systolic and diastolic BP at age 12 and 16 years were 114.4 mmHg & 113.5 mmHg(systolic) and 75.2 mmHg & 72.1 mmHg(diastolic), respectively. BP level reached the highest point when they were 13-14 years old. 2. Anthropometric variables(height, weight and body mass index etc) increased consitantly during the study period for males. However, the rate of increase was decreased for females after age 15 years. Serum total cholesterol decreased and triglyceride increased according to age for males, but they did not show any significant trend for females. Total fat intake increased at age 16 years compared with that at age 14 years. Composition of carbohydrate, protein and fat among total energy intake was 65:15:20 at age 14 and 16 years. 3. Most of anthropometric measures, especially, height, body mass index(BMI) and triceps skinfold thickness, showed a significant correlation with BP level in both sexes. When BMI was adjusted, serum total cholesterol showed a significant negative correlation with systolic BP at age 12 years in males, but at age 14 years the direction of correlation changed to positive. In females serum total cholesterol was negatively correlated with diastolic BP at age 15 and 16 years. Triglyceride and creatine showed positive correlation with systolic and diastolic BP in males, but they did not show any correlation in females. There was no consistent findings between nutrient intake and BP level. However, protein intake correlated positively with diastolic BP level in males. 4. Blood pressure change was positively associated with changes in BMI and serum total cholesterol in both sexes. Change in creatine was associated with BP change positively in males and negatively in females. Students whose sodium intake was high showed higher systolic and diastolic BP in males, and students whose total fat intake was high maintained lower level of BP in females. The major determinants on BP change was BMI in both sexes.

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JPMPH : Journal of Preventive Medicine and Public Health