Journal of Preventive Medicine and Public Health

Tae Yoon Hwang

8 Articles

Apolipoprotein E Polymorphism and Cognitive Function Change of the Elderly in a Rural Area, Korea.: Sang Kyu Kim, Tae Yoon Hwang, Kyeong Soo Lee, Pock Soo Kang, Hee Soon Cho, Young Kyung Bae; J Prev Med Public Health. 2009;42(4):261-266.; DOI: https://doi.org/10.3961/jpmph.2009.42.4.261

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OBJECTIVES
The aim of this study is to examine the cognitive function change related to aging, the incidence of cognitive impairment, and the association between apolipoprotein E polymorphism and cognitive impairment through a follow-up of the elderly with normal cognitive ability at baseline. METHODS: Two hundred and fifteen subjects aged 65 and over were surveyed in February, 1998 (baseline survey), and their cognitive function was assessed again in 2003 (1st follow-up) and the once again in 2006 (2nd follow-up). Ninety one subjects completed all surveys up through the 2nd follow-up and their cognitive function scores using MMSE-K (Korean Version of the Mini-Mental State Examination) and the distribution of apolipoprotein E allele were analyzed. RESULTS: The cognitive function scores decreased with aging and the difference between baseline and the 2nd follow-up scores of the study increased with the age group. The incidence rate of cognitive impairment through an 8-year follow-up was 38.5% and higher in older age groups. Age was the only significant factor for incidence of cognitive impairment, but there was no significant association between apolipoprotein E genotype and incidence of cognitive impairment. CONCLUSIONS: The cognition of the elderly decreased with aging and the association of apolipoprotein E genotype with incidence of cognitive impairment was not significant in this study. To confirm the association between apolipoprotein E polymorphism and incidence of cognitive impairment further studies will be needed.

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ApoE Type 4 Allele Affects Cognitive Function of Aged Population in Tianjin City, China
Shoudan Sun, Jingming Fu, Jun Chen, Wei Pang, Ruomei Hu, Haiqiang Li, Long Tan, Yugang Jiang
American Journal of Alzheimer's Disease & Other Dementiasr.2015; 30(5): 503. CrossRef

Reference Interval of Serum Thyroid Hormones in Healthy Korean Adults.: Yoon Young Jang, Chang Yoon Kim, Tae Yoon Hwang, Kyung Dong Kim, Chae Hoon Lee; J Prev Med Public Health. 2008;41(2):128-134.; DOI: https://doi.org/10.3961/jpmph.2008.41.2.128

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OBJECTIVES
This study was conducted to determine the reference interval of serum thyroid hormones (TSH, FT(3), FT(4)) in healthy Korean adults. METHODS: Health examination data from 1,591 healthy Korean adults who visited an university hospital were analyzed. Patients with specific health conditions capable of altering laboratory results were excluded from the study. Serum thyroid hormones were measured using IMMULITE 2000 (DPC, USA, 2002). Subjects were 18-65 years old; 911 were male, and 690 were female. RESULTS: The arithmetic means of TSH, FT(3), and FT(4) values for male subjects were 1.28+/-1.84 micronIU/ml, 3.23+/-0.57 pg/ml, and 1.42+/-0.22 ng/dl, respectively. In female subjects, the arithmetic means of TSH, FT3, and FT4 values were 1.49+/-2.08 micronIU/ml, 3.08+/-0.54 pg/ml, and 1.29 +/-0.24 ng/dl, respectively. The arithmetic mean FT(4) value for males decreased with age (p<0.01). The arithmetic mean FT(3) value for females increased with age (p<0.01). The arithmetic mean thyroid hormone values of all study subjects differed significantly based on season. The arithmetic mean of male FT(4) decreased with increasing BMI (p<0.01). The arithmetic mean of female FT(3) increased with increasing BMI (p<0.01). The reference intervals recommended by the IMMULITE 2000 manufacturer are 0.40-4.00 micronIU/ml for TSH, 1.80-4.20 pg/ml for FT(3), and 0.80-1.90 ng/dl for FT(4) (same values for both genders). CONCLUSIONS: There was a significant difference in the interval of thyroid hormones between males and females, but the reference interval of IMMULITE 2000 was not established by gender. There is a need to reestablish the reference interval for thyroid hormones in Korean healthy adults.

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LEVELS OF SERUM TSH AND ITS IMPLICATIONS IN DEVELOPMENT OF METABOLIC SYNDROME – TIP OF THE ICEBERG: IN YOUNG ADULTS OF GUWAHATI CITY.
Arijit Mazumdar
INTERNATIONAL JOURNAL OF SCIENTIFIC RESEARCH.2023; : 19. CrossRef
2023 Korean Thyroid Association Management Guidelines for Patients with Subclinical Hypothyroidism
Hyun Kyung Chung, Eu Jeong Ku, Won Sang Yoo, Yea Eun Kang, Kyeong Jin Kim, Bo Hyun Kim, Tae-Yong Kim, Young Joo Park, Chang Ho Ahn, Jee Hee Yoon, Eun Kyung Lee, Jong Min Lee, Eui Dal Jung, Jae Hoon Chung, Yun Jae Chung, Won Bae Kim, Ka Hee Yi, Ho-Cheol Ka
International Journal of Thyroidology.2023; 16(1): 32. CrossRef
Management of Subclinical Hypothyroidism: A Focus on Proven Health Effects in the 2023 Korean Thyroid Association Guidelines
Eu Jeong Ku, Won Sang Yoo, Hyun Kyung Chung
Endocrinology and Metabolism.2023; 38(4): 381. CrossRef
A Systematic Review and Meta-Analysis of Free Triiodothyronine (FT3) Levels in Humans Depending on Seasonal Air Temperature Changes: Is the Variation in FT3 Levels Related to Nonshivering Thermogenesis?
Alena Nikanorova, Nikolay Barashkov, Vera Pshennikova, Fedor Teryutin, Sergey Nakhodkin, Aisen Solovyev, Georgii Romanov, Tatiana Burtseva, Sardana Fedorova
International Journal of Molecular Sciences.2023; 24(18): 14052. CrossRef
Seasonal Fluctuations of Blood Pressure and Heart Rate in Healthy People: A Meta-Analysis of Panel Studies
N. V. Kuzmenko, V. A. Tsyrlin, M. G. Pliss, M. M. Galagudza
Human Physiology.2022; 48(3): 313. CrossRef
Factors influencing the reference interval of thyroid‐stimulating hormone in healthy adults: A systematic review and meta‐analysis
Dongyang Xing, Delong Liu, Ri Li, Qi Zhou, Jiancheng Xu
Clinical Endocrinology.2021; 95(3): 378. CrossRef
Seasonal variations in levels of human thyroid-stimulating hormone and thyroid hormones: a meta-analysis
N. V. Kuzmenko, V. A. Tsyrlin, M. G. Pliss, M. M. Galagudza
Chronobiology International.2021; 38(3): 301. CrossRef
An exploratory study of the association between thyroid hormone and survival of amyotrophic lateral sclerosis
Zhenzhen Zheng, Xiaoyan Guo, Rui Huang, Xueping Chen, Huifang Shang
Neurological Sciences.2014; 35(7): 1103. CrossRef
The Change of Thyroid Stimulating Hormone Values of Healthy Subjects According toTemperature and Aging
Sung Su Kim, Dong Hoon Lew, Ja Yoon Choi, Eun Ju Lee, Min Gyo Kim, Kyong Young Kim, Soo Kyoung Kim, Jung Hwa Jung, Jae Hoon Jung, Jong Ryea l Hahm
Kosin Medical Journal.2014; 29(2): 125. CrossRef
Clinical implications of preoperative thyrotropin serum concentrations in patients who underwent thyroidectomy for nonfunctioning nodule(s)
Dongju Kim, Jin-Woo Park
Journal of the Korean Surgical Society.2013; 85(1): 15. CrossRef
Serum thyrotropin as a risk factor for thyroid malignancy in euthyroid subjects with thyroid micronodule
Seong‐Su Moon, Young‐Sil Lee, In‐Kyu Lee, Jung‐Guk Kim
Head & Neck.2012; 34(7): 949. CrossRef
Serum TSH Level in Healthy Koreans and the Association of TSH with Serum Lipid Concentration and Metabolic Syndrome
Yeo Kyung Lee, Jo Eun Kim, Hyun Ju Oh, Kyung Sun Park, Soo Kyung Kim, Seok Won Park, Moon Jong Kim, Yong Wook Cho
The Korean Journal of Internal Medicine.2011; 26(4): 432. CrossRef

Change of Cognitive Function and Associated Factors among the Rural Elderly: A 5-Year Follow-up Study.: Sang Kyu Kim, Pock Soo Kang, Tae Yoon Hwang, Joon Sakong, Kyeong Soo Lee; J Prev Med Public Health. 2007;40(2):162-168.; DOI: https://doi.org/10.3961/jpmph.2007.40.2.162

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OBJECTIVES
This prospective population-based cohort study was conducted to evaluate the risk factors of cognitive impairment and the degree of cognitive function change through a 5-year follow-up. METHODS: The baseline and follow-up surveys were conducted in 1998 and 2003, respectively. Among 176 subjects who had normal cognitive function in the baseline study, 136 were followed up for 5 years. The cognitive function was investigated using the Korean version of the Mini-Mental State Examination (MMSE-K). The collected data were analyzed using SPSS and Stata. RESULTS: Of the 136 subjects analyzed, 25 (18.4%) were cognitively impaired. Old age and low social support in the baseline survey were risk factors for cognitive impairment after 5 years. In the generalized estimating equation for 128 subjects except severe cognitive impairment about the contributing factors of cognitive function change, the interval of 5 years decreased MMSE-K score by 1.02 and the cognitive function was adversely affected with increasing age, decreasing education and decreasing social support. CONCLUSIONS: Although the study population was small, it was considered that the study results can be used to develop a community-based prevention system for cognitive impairment.

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Status of Physical and Mental Function and, Its Related Factors Among the Elderly People Using from Long-Term Care Insurance Service
Nam-Kyou Bae, Young-Soo Song, Eun-Sook Shin, Young-Chae Cho
Journal of the Korea Academia-Industrial cooperation Society.2012; 13(12): 5976. CrossRef
Toxicities and functional consequences of systemic chemotherapy in elderly Korean patients with cancer: A prospective cohort study using Comprehensive Geriatric Assessment
Dong-Yeop Shin, Jeong-Ok Lee, Yu Jung Kim, Myung-Sook Park, Keun-Wook Lee, Kwang-Il Kim, Soo-Mee Bang, Jong Seok Lee, Cheol-Ho Kim, Jee Hyun Kim
Journal of Geriatric Oncology.2012; 3(4): 359. CrossRef
Apolipoprotein E Polymorphism and Cognitive Function Change of the Elderly in a Rural Area, Korea
Sang-Kyu Kim, Tae-Yoon Hwang, Kyeong-Soo Lee, Pock-Soo Kang, Hee-Soon Cho, Young-Kyung Bae
Journal of Preventive Medicine and Public Health.2009; 42(4): 261. CrossRef

Effects of the Personal Stereo System on Hearing in Adolescents.: Jong Seo Park, Sean Hee Oh, Pock Soo Kang, Chang Yoon Kim, Kyeong Soo Lee, Tae Yoon Hwang, Joon Sakong; J Prev Med Public Health. 2006;39(2):159-164.

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Abstract PDF: OBJECTIVES
This study was conducted to evaluate the effects of the personal stereo system on the hearing in adolescents. METHODS: A total of 68 adolescents(age: 13-18 years) who visited the ENT Department at a University Hospital in Daegu were personally interviewed. The questionnaires were about general characteristics of the subjects, the time of personal stereo system use(year, hour) and place. Cumulative exposure to the personal stereo system was calculated by the product of the total years and the daily hours of their use. Pure tone audiometry was performed and the hearing threshold was measured at 500, 1000, 2000, 4000 and 8000 Hz. RESULTS: The average time of using a personal stereo system a day was about 3 hours and 75% of the subjects used a personal stereo system for 2-5 years. The elevation of threshold was more prominent in the subjects who used personal stereo systems for 4 years and more compared with those subjects who used them for 3 years and under. The elevation of hearing threshold was also more prominent in the subjects who used personal stereo systems for 4 hours and more a day compared with those subjects who used personal stereo systems for 3 hours and under a day. The elevation of hearing threshold was more prominent in the subjects who used personal stereo systems for 13 hour..years and more compared to the subjects who used them 12 hour..years and under. CONCLUSIONS: These results suggest that the elevation of hearing threshold can happen to adolescents who used personal stereo systems for a long time. In order to prevent hearing loss, we need to teach adolescents appropriate usage of the personal stereo system and hearing tests should be included in the periodic school-based physical examination for the adolescents.; Summary

Serum HBsAg and Anti-HBs Positive Rate among a City Health Center Visitors.: Mal Sook Shin, Tae Yoon Hwang, Chang Yoon Kim; Korean J Prev Med. 1997;30(3):508-517.

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Abstract PDF: Hepatitis B virus(HBV) infection is one of the major health problems in Korea and HBsAg positive rate was known to be about 5~15% in general population. This study was conducted to identify the positive rates of serum HBsAg and anti-HBs among community population regared as having high HBV vaccination rate than in previous decade, using EIA(Enzyme immunoassay) method, in Seo-Gu, Taegu, Korea. The study subjects were 1,160 who visited Seo-Gu Health Center for check-up serologic markers of hepatitis B. The data were obtained from the serologic test for hepatitis markers and questionnaire survey was conducted to obtain the general characteristics, vaccination history, past history of hepatitis and other liver disease , and exposure history to risk factors of hepatitis of the study subjects. The positive rates of HBsAg and anti-HBs were 5.2% and 62.4% respectively. The positive rates of HBsAg for male and female were 6.6% and 4.3% respectively. The age was divided into two groups as group I(less than 15 years old), group II(more than 16years old) according to the hypothesis that these two groups might be different in HBV vaccination rate. HBV vaccination rates for group I and II were 83.1% and 52.3%. The positive rates of HBsAg for group I and II were 2.6% and 6.5%. The positive rates of HBsAg for the vaccinated people of the group I and II were 2.2% and 3.5%, the positive rates of anti-HBs for the vaccinated people of the group I and II were 70.1% and 71.1% respectively. The most significant factor in positive rate of HBsAg was 'hepatitis carrier in family'. Multiple logistic regression analysis revealed that 'hepatitis history' and 'hepatitis carrier in family' were significant variables for positivity of HBsAg, and 'hepatitis B vaccination' was only a significant variable for positivity of anti-HBs.; Summary

Referral Patterns and Needs for Specialist Care among Patient Referred from Health Center.: Tae Yoon Hwang, Chang Yoon Kim, Pock Soo Kang; Korean J Prev Med. 1996;29(1):133-143.

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Abstract PDF: This study was conducted to assess the referral patterns to specialist from general practitioners in health center and perceived needs of referred patients for specialist care in health center. The study subjects were 249 patients who visited to health centers and were referred to other medical facilities. The data were obtained from questionnaire survey which was conducted in Kyongjuu-city Health center, Seongju-Gun Health center and Koryong-Gun Health center in Kyongsangbuk-Do, from June 10 to october 17, 1995. The total referral rate was 2.7%. The proportion of patients who wished to be referred to medical specialists was 85.9%, and the proportion of patients referred by general practitioners in health centers was 14.1%. Among the patients who wished to be referred to medical specialists, 45.9% visited directly to health centers, 34.6% visited health centers via local clinics and 19.5% visited health centers to get referral permission only. The reasons for getting referral permission in health centers were easy geographical accessibility(34.6 %), easy to get referral permission in health centers(27.l%), and very difficult to get referral permission in local clinics(l6.4%). Among the diseases of referred patients, diseases of the musculoskeletal system and connective tissue were most prevalent on a whole, but diseases of nervous system and sensory organs were comparatively high among the patients who wished to be referred to medical specialists and infectious and parasitic diseases were comparatively high among the patients referred by general practitioners in health centers. The most favorable medical facility was general hospital including university hospital in both groups of patients who wished to be referred to medical specialist and the patient referred by general practitioners in health centers. Regarding the needs for specialist care in health center, 75.2% patients who wished to be referred to medical specialists and 74.3% of patients referred by general practitioners in health center wanted the specialist care. The most frequently requested speciality is internal medicine(47.1%), and then orthopedics and general surgery. Based on above results, this study revealed that the majority of patients referred from health center wished to be referred to medical specialists at their own will, so, referral system at health center level should be changed. And if specialist care in health center be provided, the medical care by internist could be provided first, and then that of orthopedics and general surgery could be provided. These kinds of medical cares could be covered by local clinicians as a part-time job on a voluntary basis.; Summary

Lead Concentrations of Pigeon's Tissue as Indicator of Lead pollution in Air and Soil.: Yung Woo Byun, Tae Yoon Hwang, Jung Jeung Lee, Chang Yoon Kim, Jong Hak Chung; Korean J Prev Med. 1996;29(1):15-26.

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Abstract PDF: It has been studied that a variety of fauna and flora are sensitive biological indicators which reflect the severity of regional pollution of heavy metals, but in the center of part of Taegu city the controversial issue of lead poisoning attributable to the atmosphere which contains an increased concentrations of lead has been raised recently, it is usually hard to find suitable plants or animal in the areas with heavy traffic. Pigeons are ubiquitous in and around Taegu city area, inhabiting even the most densely populated areas with heavy traffic with its small body size, high metabolic turnover, and rather limited mobility, a pigeon, as a biological indicator is expected. This study was conducted to monitor lead pollution in the Taegu and kyongju city in Korea. We measured the lead content of the various tissue of three groups of feral pigeon(Columbia livia) and soil and atmospheric lead concentration. First group was obtained io heavy traffic area in Taegu City, the second group was obtained a park in Taegu city and the third group was obtained light traffic area in kyongju city. The air and soil lead concentration of heavy traffic area in Taegu city was 0.11 microgram/m2, 4.96 microgram/g, that of park in Taegu city was 0.05 microgram/m3, 2.65 microgram/g and that of light traffic area in kyonngju city was 0.03 microgram/m3, 0.01 microgram/g. The lead content of lung, blood, kidney, femur and liver of feral pigeons in heavy traffic area in Taegu city was significantly higher than pigeons obtained in a park in Taegu city and low traffic density area in Kyonfju city(p<0.01). But stomach lead content of three group did not reflect a significant difference. In this study positive correlation was found between atmospheric lead concentrations and the concentration of lead in the pigeon's lung(r=0.5040, p<0.001), blood(r=0.3322, p<0.01), kidney(r=0.4824, p<0.001), femur(r=0.7214, p<0.001) and liverer (r=0.4836, p<0.01). we can also found positive correlation between soil lead concentrations and the concentration of lead in the pigeon's femur(r=0.4850, p<0.001), kidney(r=0.4850, p<0.001) and liver(r=0.4386, p<0.01). In the pigeon`s tissue there were significant correlations between concentration of lead in the blood and kidney(r=0.4818, p<0.001), femur(r= 0.6157, p<0.001) and liver(r=0.3889, p<0.001). In conclusion, at the heavy traffic area in Taegu city, lead concentrations found in the atmosphere and soil are reflected in the lead concentrations of different tissue of urban pigeons. It is suggested that the tissue of pigeons can be good biological indicators of environmental lead pollution.; Summary

Relationship of Body Fat Percent with Serum Lipid Level and Blood Pressure in Adults.: Seock Whan Lee, Tae Yoon Hwang, Chang Yoon Kim; Korean J Prev Med. 1995;28(4):783-794.

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Abstract PDF: This study was conducted to clarify the relationship of body fat percent with serum lipid level and blood pressure in adults. The study subjects were 472 men and l89 women who visited Multiphasic Health screening center of Yeungnam university Hospital in Taegu from May 20 to September 30, 1994. The relationship of serum lipid and blood pressure with BMl, Katsura index, atherogenic index, which calculated from the health screening data and body fat percent measured by impedance fat meter(model SIF-819) were analyzed. Three groups were classified as Group I(men: body fat percent > or= 20, women: body fat percent > or= 25, Group II (men: 15 < or = body fat percent <20, women: 20 < or = body fat percent<25, Group III(men: body fat percent <15. women: body fat percent<20) In this study, Group I accounted for 3.2%in men, 3.7%in women. Weight was significantly different among three groups in both sexes(p<0.01) and height was not significantly different among three groups. In men, serum total cholesterol, triglyceride, high density lipoprotein, low density lipoprotein. atherogenic index were significantly different(p<0.01). In women, serum total cholesterol and low density lipoprotein were significantly different(p<0.05 but there was no differences in triglyceride and high density lipoprotein among three groups. BMl and Katsura index were significantly different among three groups in both sexes(p<0.01). In men, body fat percent was positively correlated with weight, BMl, Katsura index, total cholesterol, triglyceride, low density lipoprotein, atherogenic index and systolic and diastolic blood pressures, and negatively correlated with high density lipoprotein. In women, body fat percent was positively correlated with age, height, weight, BMl, Katsura index, total cholesterol, triglyceride, low density lipoprotein and atherogenic index, and negatively correlated with high density lipoprotein. But there was no significant correlation between body fat percent and blood pressure in women. In multiple regression analysis for total cholesterol, fat percent, age and BMl were significant independent variables in men(p<0.05, R2=0.1286), and body fat percent and age in women(p<0.05, R2=0.3399). In case of LDL/HDL ratio, only BMl was a significant independent variable in men(p<0.01, R2=0.0954), and body fat percent, age and BMl in women(p<0.05, R2=0.3164). In multiple regression analysis, age, low density lipoprotein and total cholesterol were significant independent variables on systolic blood pressure in men(p<0.05, R2=0.1297), age and total cholesterol in women(p<0.055, R2=0.1705). On diastolic blood pressure, only age was a significantly independent variable in men(p<0.01, R2=0.0972) and women(p<0.01, R2=0..1218). From the result of this study, it could concluded that body fat percent was significantly associated with other obesity indices and serum lipid, but had no significant association with blood pressure. To establish the relationship of body fat percent with blood pressure, further study which consider other variables that may have an effect on blood pressure should be performed.; Summary

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