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30 "Chung Mo Nam"
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Original Articles
Rates of Change to a Positive Result in Subsequent Screening Mammography in Korean Women: A Retrospective Observational Study
Jong-Myon Bae, Sang Yop Shin, Eun Hee Kim, Yoon-Nam Kim, Chung Mo Nam
J Prev Med Public Health. 2015;48(1):48-52.   Published online December 26, 2014
DOI: https://doi.org/10.3961/jpmph.14.042
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AbstractAbstract PDF
Objectives
This retrospective cohort study aimed at calculating some parameters of changes in the findings of the subsequent screening mammography (SSM) in female Korean volunteers.
Methods
The study included screenees aged 30 to 79 years who underwent SSM voluntarily after testing negative in the baseline screenings performed between January 2007 and December 2011. A change to a positive result was defined as category 4 or 5 by using the American College of Radiology Breast Imaging Reporting and Data System. The proportion of results that had changed to positive (CP, %) was calculated by dividing the number of cases with results that were positive in the SSM by the total number of study participants. The rate of results that had changed to positive (CR, cases per 100 000 screenee-months) was calculated by dividing the number of cases with results that were positive in the SSM by the total number of months of the follow-up period.
Results
The overall CP and CR in all age groups (n=77 908) were 2.26% and 93.94 cases per 100 000 screenee-months, respectively. The median CP interval in the subjects who had positive SSM results was 30 to 36 months, while that in the age group of 30 to 39 years was shorter.
Conclusions
Different screening intervals should be considered among women aged between 30 and 59 years. In addition, a strategy for a screening program should be developed for the age group of 30 to 39 years, in particular.
Summary
Statistical Algorithm in Genetic Linkage Based on Haplotypes.
Jinheum Kim, Dae Ryong Kang, Yun Kyung Lee, Sun Mi Shin, Il Suh, Chung Mo Nam
J Prev Med Public Health. 2004;37(4):366-372.   Published online November 30, 2004
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  • 27 Download
AbstractAbstract PDF
OBJECTIVES
This study was conducted to propose a new transmission/disequilibrium test (TDT) to test the linkage between genetic markers and diseasesusceptibility genes based on haplotypes. Simulation studies were performed to compare the proposed method with that of Zhao et al. in terms of type I error probability and powers. METHODS: We estimated the haplotype frequencies using the expectation-maximization (EM) algorithm with parents' genotypes taken from a trio dataset, and then constructed a two-way contingency table containing estimated frequencies to all possible pairs of parents' haplotypes. We proposed a score test based on differences between column marginals and their corresponding row marginals. The test also involved a covariance structure of marginal differences and their variances. In simulation, we considered a coalescent model with three genetic markers of biallele to investigate the performance of the proposed test under six different configurations. RESULTS: The haplotype-based TDT statistics, our test and Zhao et al.'s test satisfied a type I error probability, but the TDT test based on single locus showed a conservative trend. As expected, the tests based on haplotypes also had better powers than those based on single locus. Our test and that of Zhao et al. were comparable in powers. CONCLUSION: We proposed a TDT statistic based on haplotypes and showed through simulations that our test was more powerful than the single locus-based test. We will extend our method to multiplex data with affected and/or unaffected sibling (s) or simplex data having only one parent's genotype.
Summary
English Abstracts
Socioeconomic Costs of Stroke in Korea: Estimated from the Korea National Health Insurance Claims Database.
Seung ji Lim, Han joong Kim, Chung mo Nam, Hoo sun Chang, Young Hwa Jang, Sera Kim, Hye Young Kang
J Prev Med Public Health. 2009;42(4):251-260.
DOI: https://doi.org/10.3961/jpmph.2009.42.4.251
  • 7,494 View
  • 148 Download
  • 42 Crossref
AbstractAbstract PDF
OBJECTIVES
To estimate the annual socioeconomic costs of stroke in Korea in 2005 from a societal perspective. METHODS: We identified those 20 years or older who had at least one national health insurance (NHI) claims record with a primary or a secondary diagnosis of stroke (ICD-10 codes: I60-I69, G45) in 2005. Direct medical costs of the stroke were measured from the NHI claims records. Direct non-medical costs were estimated as transportation costs incurred when visiting the hospitals. Indirect costs were defined as patients' and caregivers' productivity loss associated with office visits or hospitalization. Also, the costs of productivity loss due to premature death from stroke were calculated. RESULTS: A total of 882,143 stroke patients were identified with prevalence for treatment of stroke at 2.44%. The total cost for the treatment of stroke in the nation was estimated to be 3,737 billion Korean won (KRW) which included direct costs at 1,130 billion KRW and indirect costs at 2,606 billion KRW. The per-capita cost of stroke was 3 million KRW for men and 2 million KRW for women. The total national spending for hemorrhagic and ischemic stroke was 1,323 billion KRW and 1,553 billion KRW, respectively, which together consisted of 77.0% of the total cost for stroke. Costs per patient for hemorrhagic and ischemic stroke were estimated at 6 million KRW and 2 million KRW, respectively. CONCLUSIONS: Stroke is a leading public health problem in Korea in terms of the economic burden. The indirect costs were identified as the largest component of the overall cost.
Summary

Citations

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    Sun-Mi Kim, Da-Yang Kim, Kwang-Soo Lee
    The Korean Journal of Health Service Management.2017; 11(1): 91.     CrossRef
  • The Economic Burden of Hepatitis A, B, and C in South Korea
    Changwoo Shon, Hyung-Yun Choi, Jae-Jun Shim, So-Youn Park, Kyung Suk Lee, Seok-Jun Yoon, In-Hwan Oh
    Japanese Journal of Infectious Diseases.2016; 69(1): 18.     CrossRef
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    Tai Hwan Park, Jay Chol Choi
    Journal of Clinical Neurology.2016; 12(1): 42.     CrossRef
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    Journal of Neurology.2016; 263(10): 2032.     CrossRef
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The Association between Obesity Indices in Adolescence and Carotid Intima-media Thickness in Young Adults: Kangwha Study.
Yoo Jung Lee, Chung Mo Nam, Hyeon Chang Kim, Nam Wook Hur, Il Suh
J Prev Med Public Health. 2008;41(2):107-114.
DOI: https://doi.org/10.3961/jpmph.2008.41.2.107
  • 5,229 View
  • 41 Download
  • 9 Crossref
AbstractAbstract PDF
OBJECTIVES
The aim of this study is to investigate the association between obesity indices (body mass index, weight, waist-hip ratio and waist circumference) in adolescents and the carotid intima-media thickness (C-IMT) in early adulthood. We also wanted to identify the best predictor for C-IMT among these obesity indices. METHODS: This study used community-based prospective cohort study, known as the Kangwha Study, and the data we used were from subjects who were 16-years old in 1996 (defined as "adolescencec") and 25 years-old in 2005 (defined as "early adulthoodc"). The 256 subjects (113 men and 143 women) who were used for analysis participated in both follow-ups, and they underwent B-mode ultrasonography of the carotid arteries at the early adulthood follow-up. Obesity indices were defined as the body mass index, weight, waist-hip ratio and waist circumference. The C-IMT was defined as the mean of the maximal IMT of each common carotid artery. The C-IMT and obesity indices associations were evaluated via multivariable regression, logistic regression and the receiver-operator characteristic curve analyses. RESULTS: In men, all the obesity indices in adolescence were showed to have statistically significant positive association with C-IMT in early adulthood. However, no such relationship was showed in women. On multiple regression and logistic regression analysis, the waist-hip ratio showed the biggest relationship with the C-IMT among the 4 obesity indices. However, there were no statistical significant differences and no best predictor was found. For the women, the obesity incidences and C-IMT showed no relationships. CONCLUSIONS: This study suggested that obesity in adolescence was related to an increase C-IMT in healthy young Korean men.
Summary

Citations

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  • Application of Standardized Regression Coefficient in Meta-Analysis
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  • Comparison analysis of childhood body mass index cut-offs in predicting adulthood carotid intima media thickness: Tehran lipid and glucose study
    Farhad Hosseinpanah, Amirhosein Seyedhoseinpour, Maryam Barzin, Maryam Mahdavi, Erfan Tasdighi, Pooneh Dehghan, Amin Momeni Moghaddam, Fereidoun Azizi, Majid Valizadeh
    BMC Pediatrics.2021;[Epub]     CrossRef
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    Sun Jae Jung, Hyeon Chang Kim, Il Suh
    Cardiovascular Prevention and Pharmacotherapy.2019; 1(1): 3.     CrossRef
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    Zehra Esra Önal, Levent Soydan, Hatice Eren Öztürk, Çiğdem Sağ, Tamay Gürbüz, Çağatay Nuhoğlu, Mehmet Masum Şimşek
    Journal of Pediatric Endocrinology and Metabolism.2016;[Epub]     CrossRef
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    Nam Wook Hur, Hyeon Chang Kim
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Original Articles
Factors Associated with Hypertension Control and Antihypertensive Medication among Hypertensive Patients in a Community.
Dong Han Lee, Youn Hee Choi, Kang Hee Lee, Dae Ryong Kang, Sun Ha Jee, Chung Mo Nam, Il Suh
Korean J Prev Med. 2003;36(3):289-297.
  • 4,764 View
  • 57 Download
AbstractAbstract PDF
OBJECTIVES
The main objectives of this study are to identify the factors associated with hypertension control and to determine the influencing factors associated with antihypertensive therapy. METHODS: The study was conducted on 107 subjects who participated in the 1999 and 2002 Gwacheon Study and who had had uncontrolled hypertension (systolic > or=140 or diastolic > or= 90mmHg) in 1999. We compared the characteristics of the controlled and uncontrolled hypertensive group and investigated the characteristics of those taking antihypertensive medication. Univariate associations between hypertension control and its characteristics and the association between antihypertension treatment and its characteristics were tested with x2-test. We also performed logistic regression analysis. RESULTS: The participants who had their blood pressure checked within 6 months before their first measurement and those who had taken the antihypertensive medication showed significantly better hypertension control during the follow-up. The multivariate analysis showed that baseline antihypertensive therapy was the most important determinant factor of hypertension control during the follow-up. Socioeconomic level and life style did not affect hypertension control when controlled by the treatment variable in this study. The factors associated with antihypertensive therapy at follow-up were previous antihypertensive therapy, old age, and high educational level. CONCLUSIONS: Those who received antihypertensive therapy and those who had their blood pressure re-checked within 6 months both showed well controlled hypertension. The subjects with high educational level complied well with the antihypertensive regimen, but those in their forties did not.
Summary
Awareness, Treatment, Control, and Related Factors of Hypertension in Gwacheon.
Youn Hee Choi, Chung Mo Nam, Mi Hyun Joo, Ki Tae Moon, Jee Seon Shim, Hyeon Chang Kim, Il Suh
Korean J Prev Med. 2003;36(3):263-270.
  • 2,335 View
  • 36 Download
AbstractAbstract PDF
OBJECTIVES
To identify the factors related to awareness, treatment, and control of hypertension in a Gwacheon population. METHODS: This study surveyed 1, 176 Gwacheon residents older than 40 years, and measured blood pressure using a standardized guideline in 1999. The study subjects were 473 adults (175 males, 298 females) with hypertension defined as a systolic blood pressure > or= 140 mmHg, diastolic blood pressure > or= 90 mmHg or reported treatment with antihypertensive medications. Information on awareness, treatment, and control of hypertension, and sociodemographic and health-related factors was collected through person-to-person interviews with a structured questionnaire. RESULTS: Overall, 252 (53.3%) of hypertensive subjects were aware of their condition, of whom as many as 193 (76.6%) were being treated, and 81 (42.0%) had their blood pressure controlled at the recommended level (< 140/90 mmHg). However, of the 473 subjects found to have hypertension, only 40.8% were being treated, and 17.1% were under control. There were no significant differences in the proportions of awareness, treatment, and control of hypertension. In multiple logistic regression models, awareness of hypertension was positively associated with age and family history of hypertension in females. Control of hypertension was also positively associated with having a partner and marital status in females. CONCLUSION: These findings demonstrate that much greater efforts on improving awareness, treatment, and control of hypertension are needed, even in urban community settings, considering related factors such as age, family history, and marital status. However, these factors should be further investigated for their causal relationship.
Summary
Comparing Difference of Volume of Psychiatric Treatments between the Patient with Health Insurance and Those with Medical Assistance: For Inpatients of Korean Psychiatric Hospitals.
Dae Hee Lee, Eun Cheol Park, Chung Mo Nam, Sang Gyu Lee, Dong Han Lee, Seung Hum Yu
Korean J Prev Med. 2003;36(1):33-38.
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AbstractAbstract PDF
OBJECTIVES
To assess the difference in the volume of psychiatric treatments provided to health insurance inpatients, compared with those on medical assistance (the medical aid program) Korean psychiatric hospitals, and to determine factors which affect the volume of the services. METHODS: 21 psychiatrists, from 3 Korean psychiatric hospitals recorded the frequencies psychiatric treatments provided to inpatients in one week (February18-24, 2002). The records of 329 patients were analyzed through t-tests, and random effectmixed model analyses to define the difference between the two groups, and to find other factors affecting the volume of service. RESULTS: A significant difference in the volume of psychiatric treatments provided was observed between the health insurance and medical assistance groups. The variation in the volume of service between hospitals was prominent, and other factors (gender, agegroup, length of stay and mental disorder) were also found to be significant. The patients on medical assistance received only 70% of the psychiatric treatments of those on health insurance. CONCLUSIONS: More effort is required to improve the methods of payment to increase the level of fee scheduling for medical assistance. Further studies on the mechanisms causing these differences in the volume of service are required.
Summary
Cigarette Smoking, Alcohol and Cancer Mortality in Men: The Kangwha Cohort Study.
Sang Gyu Lee, Chung Mo Nam, Sang Wook Yi, Hee Chul Ohrr
Korean J Prev Med. 2002;35(2):123-128.
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AbstractAbstract PDF
OBJECTIVE
To examine the relationship between cigarette smoking, alcohol and cancer mortality in men in the Kangwha cohort after 12 years and 10 months of follow up. METHODS: The subjects consisted of 2,681 men in the Kangwha cohort aged over 55 in 1985. Number of deaths and the time to death from all cancers and other cause were measured and the data for the smoking and drinking habits were obtained from the baseline survey data in 1985. All subjects were categorized into four groups according to their smoking habits: non-smokers, ex-smokers, moderate-smokers (1-19 cigarettes per day), heavy-smokers (> or =20 cigarettes per day). In addition, they were also categorized according to their drinking habits: non-drinkers, light-drinkers (< or =1 drink per week), moderate-drinkers (<3 drinks per day), heavy-drinkers (> or =3 drinks per day). The cancer specific death rates were calculated according to their smoking and drinking status. The adjusted risk ratio for all cancer deaths according to their smoking and drinking status were estimated using the Cox's proportional hazard regression model. RESULTS: Using nonsmokers as the reference category, the adjusted risk ratio for all cancer deaths were 1.573(95% CI=1.003-2.468) for heavy-smokers. For lung cancer deaths, the adjusted risk ratios were 3.540(95% CI=1.251-10.018) for moderate-smoker and 4.114(95% CI=1.275-13.271) for heavy-smokers. Compared to non-drinkers, the adjusted risk ratio for stomach cancer was 2.204(95% CI=1.114-4.361) for light-drinkers. CONCLUSION: Smoking is the most significant risk factor for cancer deaths particularly lung cancer.
Summary
Pesticides and Cancer Incidence: The Kangwha Cohort Study.
Jae Woong Sull, Sang Wook Yi, Tae Yong Sohn, Sun Ha Jee, Chung Mo Nam, Heechul Ohrr
Korean J Prev Med. 2002;35(1):24-32.
  • 2,543 View
  • 46 Download
AbstractAbstract PDF
OBJECTIVE
Few studies have examined the relationship between the risk of cancer and exposure to pesticides in Korea or in other East Asian that have until recently used chlorophenoxy herbicides. The aim of this study was to evaluate the relationship between the exposure to pesticides and cancer incidence. METHODS: We conducted a prospective cohort study with a follow-up period of 13 years (1985-1998). The subjects included 2,687 male and 3,589 female Kangwha Island residents, Koreans aged fifty-five or more as of March 1985, who received a personal health interview and completed a health examination survey. A Cox proportional hazards models were used to estimate relative risks (RR). RESULTS: At baseline, the mean age of the study participants in 1985 was 66.4 for males and 67.1 for females. During the 13 years follow-up, a total of 300 incidents of cancer in males and 146 in females developed. In males, the total cancer incidence in the highest group was RR, 1.4 (95% CI=1.0-1.9), p for trend=0.041, for digestive organ cancer incidence in the highest group, RR, 1.5 (95% CI=1.0-2.3), p for trend=0.057, for stomach cancer incidence in the highest group, RR, 1.6 (95% CI=0.9-2.8), p for trend=0.094, for gallbladder cancer incidence in the highest group, RR, 9.1 (95% CI=1.1-77.0), p for trend=0.014 were elevated according to the higher frequency of pesticide use per year. In particular, the risk of gallbladder cancer was very high. Although not significant, the risk of liver cancer was higher than in the non-exposed group (in the highest group, RR, 2.0 (95% CI=0.7-5.9)). In females, although not significant, breast cancer incidence in the highest exposure group was higher than in the non-exposed group (in the highest group, RR, 4.7 (95% CI=0.8-27.9)). CONCLUSIONS: This study demonstrates that Korean farmers who use pesticides, particularly males, have a significantly higher total cancer incidence, particularly from digestive organ cancers such as, stomach, gallbladder, and liver cancer. In particular, the risk of gallbladder cancer was very high.
Summary
A Meta-analysis of the Association between Blood Lead and Blood Pressure.
Sang Baek Koh, Chun Bae Kim, Chung Mo Nam, Hong Ryul Choi, Bong Suk Cha, Jong Ku Park, Ho Sung Jee
Korean J Prev Med. 2001;34(3):262-268.
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OBJECTIVES
To integrate the results of studies which assess an association between blood lead and blood pressure. METHODS: We surveyed the existing literature using a MEDLINE search with blood lead and blood pressure as key words, including reports published from January 1980 to December 2000. The criteria for quality evaluation were as follows: 1) the study subjects must have been workers exposed to lead, and 2) both blood pressure and blood lead must have been measured and presented with sufficient details so as to estimate or calculate the size of the association as a continuous variable. Among the 129 articles retrieved, 13 studies were selected for quantitative meta-analysis. Before the integration of each regression coefficient for the association between blood pressure and blood lead, a homogeneity test was conducted. RESULTS: As the homogeneity of studies was rejected in a fixed effect model, we used the results in a random effect model. Our quantitative meta-analysis yielded weighted regression coefficients of blood lead associated with systolic blood pressure and diastolic blood pressure results of 0.0047 (95% confidence interval [CI]: -0.0061, 0.0155) and 0.0004 (95% CI: -0.0031, 0.0039), respectively. CONCLUSIONS: The published evidence suggested that there may be a weak positive association between blood lead and blood pressure, but the association is not significant.
Summary
Analysis of Socioeconomic Costs of Smoking in Korea.
Han Joong Kim, Tae Kyu Park, Sun Ha Jee, Hye Young Kang, Chung Mo Nam
Korean J Prev Med. 2001;34(3):183-190.
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OBJECTIVE
To estimate the annual economic costs attributable to cigarette smoking in Korea. METHODS: The costs were classified as being direct medical and non-medical costs, indirect costs and others. We focused on those costs related that are incurred in the treatment of selected diseases (cardiovascular diseases, respiratory diseases, and cancers), which have been proven to be caused by smoking. In addition to the basic costs of treatment, the additional amount of costs occurred due to smoking was obtained by computing the population attributable risk (PAR%) caused by smoking. To compute the PAR%, relative risks of smoking to the number of outpatient visits, hospitalizations, and the death were estimated using the Cox proportional hazard model, respectively. Our major data source was the 'Korea Medical Insurance Corporation (KMIC) cohort study,' which was composed of a total of 115,682 male and 67,932 female beneficiaries who had complete records of their smoking histories in the year of 1992. RESULTS: The annual costs that could be attributable to smoking were estimated to be in the range of 2,847,500 million Won to 3,959,100 million Won. The maximum estimate of 3,959,100 million Won includes 233,100 million Won for medical costs, 5,100 million Won for transportation costs, 27,600 million Won for care giver's economic costs, 69,100 million Won in productivity loss, 3,435,000 million Won lost because of premature death, 172,100 million Won in costs resulting from passive smoke inhalation and 17,100 million Won for costs that resulted from fires that were caused by careless smoking. CONCLUSION: Our study confirms that the magnitude of the economic burden of smoking to Korean society is substantial. Therefore, this study provides strong evidence that there is a strong need for a national policy of tobacco control in Korea.
Summary
Timing of Menarche and Physical Growth during Childhood and Adolescence: The Kangwha Study.
Chang Soo Kim, Chung Mo Nam, Duck Hi Kim, Hyun Chang Kim, Kang Hee Lee, Sun Ha Jee, Il Suh
Korean J Prev Med. 2000;33(4):521-529.
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OBJECTIVES
To assess height, weight and body mass index from childhood to adolescence according to the age at menarche and hence to study the influence of childhood growth on the menarche age. METHODS: "The Kangwha Study" was a community-based prospective cohort study which included the entire population of 219 female first graders in Kangwha county in 1986. Among the 219 girls, 119 girls who had received complete follow up checks during the study period(1986~1997), were included in this study, except one for whom menarche age information was unavailable. The remaining 118 girls were divided into three groups according to the timing of menarche : early(<25 percentile), intermediate and late(> or =75 percentile) maturers. RESULTS: The average age at menarche was 12.7 years : early 11.3 years, intermediate 12.6 years and late 13.7 years. The early maturers were taller and heavier between 6~8 years. But, the mean weight and body mass index at the menarche age did not differ statistically among the three groups. The weight and body mass index of the early maturers were consistently higher than those of the late maturers over the entire period of the study. CONCLUSIONS: Critical body weight and body mass index must be attained for menstruation to be attained and the age at menarche is largely determined by the childhood growth. In addition, it seems that childhood growth and age at menarche are associated with adolescent weight and body mass index.
Summary
A Meta-analysis on the Association between Chronic Noise Exposure and Blood Pressure.
Chun Bae Kim, Sang Baek Koh, Jai Young Kim, Bong Suk Cha, Hong Ryul Choi, Jong Tae Lee, Chung Mo Nam, Sang Yun Lee, Seung jun Wang, Keeho Park, Dae Youl Kim
Korean J Prev Med. 2000;33(3):343-348.
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OBJECTIVES
This study was conducted to integrate the results of studies assessing the association between chronic noise exposure and blood pressure. METHODS: Using a MEDLINE search with noise exposure, blood pressure and hypertension as key words, we retrieved articles from the literature that were published from 1980 to December 1999. The criteria for quality evaluation were as follows: 1) the study subjects must have been workers employed at a high noise level area 2) The paper should use average and cumulative noise exposure as method for exposure evaluation. 3) Blood pressure in each article should be reported in a continuous scale Among the 77 retrieved articles, six studies were selected for quantitative meta-analysis. Before the integration of the regression coefficients for the association between blood pressure and noise level, homogeneity tests were conducted. RESULTS: All studies were a cross-sectional design and the study subjects were industrial workers. Five papers used a time-weighted average for noise exposure and only one paper calculated the cumulative noise exposure level. The measurement of blood pressure in the majority of studies were accomplished in a resting state, and used an average of two or more readings. The homogeneity of studies was rejected in a fixed effect model, so we used the results in a random effect model. The results of the quantitative meta-analysis, the weighted regression coefficient of noise associated with systolic blood pressure and diastolic blood pressure were 0.05 (95% confidence interval [CI]: -0.03, 0.13) and 0.06 (95% CI: -0.01, 0.13), respectively. CONCLUSIONS: Our results suggested that chronic exposure to industrial noise does not cause elevated blood pressure.
Summary
Twelve-year Incidence of Hypertension and Its Risk Factors in a Lean Population: the Kangwha Study.
Hyeon Chang Kim, Il Suh, Kang Hee Lee, Sun Ha Jee, Chang Soo Kim, Chung Mo Nam
Korean J Prev Med. 1999;32(4):435-442.
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OBJECTIVES
The purpose of this study was to examine the twelve-year incidence of hypertension, and to find risk factors for the incidence in adult population in Kangwha County, Korea. METHODS: In 1986, 413 males(mean age 37 years) and 434 females(mean age 33 years) were examined in the Kangwha Study. Among 764 non-hypertensive participants, 164 males and 214 females were reexamined in 1998. Blood pressure(BP) was measured with standard mercury sphygmomanometers. Multiple logistic regression analysis was used to estimate the relative risk of risk factors on the incidence of hypertension. RESULTS: During the 12-year period, 68 of 164 males and 53 of 214 females developed hypertension. In a multiple logistic model adjusted for age and pulse rate, baseline BP, baseline body mass index(BMI) and BMI change during the follow-up period were significantly related to the incidence of hypertension. Adjusted relative risk(RR)s of baseline high-normal BP were 3.90(95% CI: 1.81-7.84) in males, and 12.72(95% CI: 3.70-30.73) in females. Compared with lower baseline BMI group, adjusted RRs of middle baseline BMI group were 2.66(95% CI: 1.19-5.70) in males, and 2.33(95% CI: 0.95-5.55) in females. Adjusted RRs of upper baseline BMI group were 3.52(95% CI: 1.53-7.67)in males and 3.63(95% CI: 1.50-8.43) in females. Increase of BMI was positively related to the incidence in males(adjusted RR=2.71, 95% CI: 1.00-6.71) and females(adjusted RR=3.05, 95% CI: 1.29-6.88). CONCLUSIONS: The twelve-year incidence of hypertension was 41.5% in males, and 25.8% in females. Baseline BP, baseline BMI, and BMI change were strongly related to the incidence of hypertension.
Summary
The effect of sodium and potassium intake on blood pressure change in Korean adolescents.
Il Suh, Chung Mo Nam, Kang Hee Lee, Sun Ha Jee, Suk Il Kim, Gyu Sang Kim, Chun Bae Kim
Korean J Prev Med. 1998;31(3):384-394.
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In order to investigate the effect of the urinary excretion of sodium and potassium on the change on blood pressure over 3 years, 668 adolescents aged 13 years living in Kangwha area were investigated in a longitudinal follow-up study. Two measurements were taken on each blood pressure (diastolic, systolic) and the average of the two readings was used in the analysis. Sodium and potassium intake were estimated by the determination of those electrolytes in 24hr urine. The mixed model regression analysis was used to identify the effect of urinary sodium and potassium on the change of blood pressure after controlling for BMI of each age. On simple bivariate analysis no relationship was found between urinary sodium excretion and systolic or diastolic blood pressure among both male and female, however, a significant positive association between urinary potassium excretion and systolic blood pressure among male. The results of mixed regression analysis showed that the body mass index (BMI) were more influential that urinary electrolytes among this study subjects. It suggested that risk factors observed from the adults, may not be identical with that of the growing aged population. After control of the BMI and age, significant association between sodium and diastolic BP among male, and association between potassium and systolic BP among female, were found. In summary, the results indicate that growth has been more influential than dietary factor on blood pressure for growing aged population.
Summary

JPMPH : Journal of Preventive Medicine and Public Health
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