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Yun Kyeong Rho 3 Articles
Relationship of Body Fat Distribution and Serum Lipids in Men.
Byung Yeol Chun, Min Hae Yeh, Sung Kook Lee, Yun Kyeong Rho, Soon Yeol Nam
Korean J Epidemiol. 1994;16(1):28-40.
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Abstract
This study was conducted to investigate the relationship of body fatness indicators and serum lipids (total cholesterol, high density lipoprotein (HDL) cholesterol, low density lipoprotein(LDL) cholesterol, triglycerides, myocardial infarction(MI) index) to find anthropometric indicators of body fat distribution that are strongly associated with serum lipids. 347 adult male workers of an industry in Kyungpook province were selected and data on the general characteristics were obtained using questionnaire from June 26 to June 29, 1991. Serum lipids were tested with 5 ml fasting blood and height, weight, circumferences of waist, hip and mid-thigh, five subcutaneous fat thickeness(biceps, triceps, supscapular, suprailiac, thigh) were mea sured using Ultrasound type A TATT. Waist circumference, waist/hip circumference ratio and subcutaneous fat thickness of suprailiac area are significantly increased with increasing age, but thigh circumference is significantly decreased (P< 0.05). These results suggest that central obesity is closely related to age and waist circumference may be the best indicator of body fatness or body fat distribution in men. In younger age group(below 40 year old), the result of canonical correlations analysis suggests that circumferences(0.501) was slightly closely related to serum lipids than subcutaneous fat thickness(0.493), however, in older age group (above 40 year old), subcutaneous fat thickness(0.528) were more strongly associated with serum lipids than circumferences(0.419). Weighted canonical analyses suggest that biceps and suprailiac areas in younger age group and sub scapular area in older age group are stronger indicators of serum lipids among .subcutaneous fatness measurements. Of the circumferences, waist is the most strongest indicator of serum lipids in both age groups. Therefore, it is recommended that circumference of waist and subcutaneous fat thickness of subscapular area should be measured to estimate the degree of central obesity for preventing cardiovascular disease in men.
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Korean summary
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The prevalence of hepatitis B surface antigen among Korean byliterature review.
Byung Yeol Chun, Mi Kyeong Lee, Yun Kyeong Rho
Korean J Epidemiol. 1992;14(1):70-78.
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Abstract
This study was carried out to estimate the prevalence of HBsAg in Korea by systematic reviewing the literature on HBsAg prevalence, published during the period of 1980-1989. We analyzed the result of 74 studies by serologic tests, age, sex, and characteristics of study subjects and summarized. The average prevalence rate of HBsAg was 7.95±2.97% or 7.25% considering the size of the study population. The prevalence rate of HBsAg in male (9.11%) was higher than that in female(7.13%). The prevalence of HBsAg was 6.21% in the age group of 0-9 years, 7.00% in the age group of 10-19 years, 8.69% in twenties, 8.83% in thirties, 8.34% in forties, 5.81% in fifties, and 4.39% in sixties or over. The prevalence of HBsAg was increased with age at a peak in thirties and was decreased thereafter. The prevalence of HBsAg was 5.67% in students, 6.57% in pregnant women, 8.83% in the population of community, and 16.62 % in the high risk children such as orphans and mentally retarded children.
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Relation of long-term weight change to risk factors for coronary artery disease.
Sung Kook Lee, Byung Yeol Chun, Kyung Min Park, Yun Kyeong Rho, Jin Wouk Jeong, Min Hae Yeh
Korean J Epidemiol. ;15(2):132-148.
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Abstract
This study was conducted to examine the relation of long-term weight change to the risk factors for coronary artery idsease. The study subjects included 592 healthy male workers in a steel company in Kyungpook province who were employed between 1971 and 1978 and whose age was between 23 and 29 years old at the time of employment. In this study, healthy worker was defined as a man with normal body weight (90%≤ideal body weight<110%), [ideal body weight=(individual height in cm-100)x0.9], no sugar no protein in urine, (m and) systolic blood pressure (SBP)<140mmHg and diastolic blood pressure (DBF)<90mmHg. Between July 2 and September 30, 1992, all of the study subjects were tested for serum lipid [cholesterol (TC), triglyceride (TG),and HDL-cholesterol (HDL-C)] and uric acid with 10ml fasting blood, and height, weight and blood pressure were measured. A questionnaie was administered for life style, behavioral pattern and demographic characteristics. The study subjects were classified by their long-term weight change into four group;weight lost group(W.L.G., N=40), weight stable group (W.S.G., N=257), mild weight gain group (M.W.G.G., N=127)f severe weight gain group (S.W.G.G., N=168). The average age (SD) of the study subjects was 45.66(3.93) years. Proportions of the workers with shortness of breath and palpitation were significantly increased with weight increment. Weight increment was positively associated with SBP (p<0.001), DBP (p<0.001), TG (p<0. 001), atherosclerosis index (AI) (p<0.01) and uric acid(p<0.001), whereas negatively associated with HDL-C (p<0.001). Odds ratios (OR) of the S.W.G.G to the W.S.G. for shortness of breath (OR=2.41), palpitation (OR=2.68), SBP(OR=2.31), DBP(OR=2.18), TG(OR=4.11), HDL-C(OR=1.86), AI(OR=2.19) and uric acid(OR=3.39) were significantly greater than 1. On the other hand, ORs of the W.L.G. to the W.S.G. for HDL-C (OR=0.26), AI(OR=0.47) were significantly smaller than 1. Weight change showed significant effect on short ness of breath, palpitation, SBP. DBP, TG, HDL-C, AI and uric acid when the effects of other variables [weight change (raw data), age, drinking and smoking habits, exercise and behavior pattern] were controlled by the stepwise logistic regression analysis. For those significant fisk factors and symptoms, ORs of each weight change group in reference to the W.S.G (dummy variable) were calculated by logistic regression method. ORs of the W.L.G. for HDL-C (OR=0.26) and AI(OR=0.37) were significantly smaller than 1. ORs of the M.W.G.G. for all the risk factors and symptoms were not significant, and ORs of the S.W.G.G. for shortness of breath (OR=1.75),palitation(OR=2.05), SBP(OR=2.53), DBP(OR=2.41), TG(OR=2.81), HDL-C (OR=2.28), AI(OR=2.16) and uric acid (OR=2.20) were significantly greater than 1.
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