Journal of Preventive Medicine and Public Health

Won Chul Lee

11 Articles

The Association between Sleep and Obesity in Korean Adults.: Young Jun Park, Won Chul Lee, Hyeon Woo Yim, Young Moon Park; J Prev Med Public Health. 2007;40(6):454-460.; DOI: https://doi.org/10.3961/jpmph.2007.40.6.454

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OBJECTIVES
Obesity is currently an epidemic in Korea, and sleep duration is thought to be one of the risk factors for obesity. The objective of this study was to test the hypothesis that short sleep duration is associated with obesity in Korean adults. METHODS: The data from the 2001 Korean National Health and Nutrition Survey were used, and 6,174 subjects aged 18~80 years were included in the analysis. Sleep duration was measured using information obtained from self-reported questionnaires. Obesity, the main outcome variable, was measured according to body mass index. Multiple regression modeling was used to adjust for potential confounding variables. RESULTS: The study results revealed a negative association between sleep duration and body mass index among Korean adults. These associations persisted after controlling for the potential confounding variables. CONCLUSIONS: These findings support the hypothesis that sleep duration is associated with obesity in Korean adults. In addition, these observations support earlier experimental sleep studies and provide a basis for future studies on weight control intervention by increasing the amount of sleep.

Summary

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A Case-control Study of the Relationships between Reproductive Factors and Degree of Dysplasia of the Colorectal Adenoma and Cancer.: Se Young Lee, Won Chul Lee, Kyu Yong Choi, Mi Kyung Kim, Jin Hee Lee, Kwang Ho Meng; Korean J Prev Med. 2003;36(3):279-288.

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Abstract PDF: OBJECTIVES
Evidence for an effect of reproductive factors on colorectal carcinogenesis is not yet consistent. Little research has been conducted to investigate whether reproductive factors were associated with colorectal adenomas that are the precursors of colorectal cancer. We evaluated the relationships between reproductive factors and the degree of dysplasia of the colorectal adenoma and cancer as colorectal adenoma-carcinoma sequence. METHODS: For this study, 241 adenoma cases with histo-pathologically confirmed incident colorectal adenoma, 76 cancer cases with colorectal cancer and 1677 controls were collected from Our Lady of Mercy Hospital, The Catholic University of Korea, during 1994-1999. Before colonoscopy, information on demographic characteristics, reproductive factors, life style habits and dietary intake were obtained by interviewed questionnaire. Adjusted OR and 95% CI were estimated by using polytomous logistic regression model. Potential confounders that were selected based on the goodness of fit statistics and interaction between risk factors were considered in this adjustment. The Wald statistic was calculated to test the heterogeneity of the odds ratios for each case. RESULTS: Postmenopausal women with natural menopause were found to be positively associated with the risk of mild dysplasia adenoma (multivariate-adjusted OR : 2.59, 95% CI=1.1-6.2). Parity was found to be negatively associated with the risk of colorectal cancer (age-adjusted OR : 0.40, 95% CI=0.2-0.9), but did not significantly decrease the risk of colorectal cancer (multivariate-adjusted OR : 0.95, 95% CI=0.3-2.9). No associations were seen between age at menarche, breast feeding, induced abortion, oral contraceptive use, menopausal types, menopausal age or hormone replacement therapy (HRT) and the degree of dysplasia of the colorectal adenoma and cancer. However, none of these associations differed significantly between the degree of dysplasia of the colorectal adenoma and cancer. CONCLUSIONS: These findings suggest that postmenopausal women with natural menopause may experience increased risk of mild dysplasia adenoma among colorectal adenoma-carcinoma sequence.; Summary

The Predictive Factors to Participation in Cervical Cancer Screening Program.: Young Bok Kim, Won Chul Lee, Myung Kim, Chee Kyung Chung; Korean J Prev Med. 2001;34(3):237-243.

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Abstract PDF: OBJECTIVES
To examine the screening rate of cervical cancer in women and to find out the predictive factors for participation in cervical cancer screening programs within their life-time and within the last two years. METHODS: The data was based on self-reported questionnaires from 1,613 women whose ages ranged from 26 to 60 years; this survey was performed between December 1999 and January 2000. This study analyzed the predictive factors for participation in cervical cancer screening programs within their life-time and within the last two years. A logistic regression analysis was performed in order to derive the significant variables from the predisposing factors (demographic factor, health promotion behavior, reproductive factor), intervention factors (information channel, relation with medical staff), and proximal factors (attitude, social influence, self-efficacy). All analyses were performed by the PC-SAS 6.12. RESULTS: Our analyses showed that the screening rate for the women who received a cervical cancer screening (Pap smear) more than once within their life-time was 56.1% while those who had received one within the last two years was 34.5%. The significant factors for participation in cervical cancer screening program within their life-time were their income, married age, health promotion score, relation with medical staffs, social influence, and self-efficacy. On the other hand, age, number of pregnancies, menarche age, relation with medical staffs, social influences, and self-efficacy were significant factors for those being screened within the last two years. The predictive power of the logit model within their life-time was 68.8% and that within the last two years was 66.6%. CONCLUSION: The predictive factors for participation in cervical cancer screening program within their life-time are different from those for within the last two years, and that women's relations with medical staffs and social influences were the critical factors impacting on cervical cancer screening rates.; Summary

Analysis of Cancer Screening Recommendations by Physicians for Various Types of Cancer.: Yong Mun Park, Won Chul Lee, Keun Sang Yum, Jung Wan Koo, Hyeon Woo Yim, Kang Sook Lee, Hoon Kyo Kim; Korean J Prev Med. 2000;33(1):99-108.

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Abstract PDF: OBJECTIVES
The purpose of this study was to examine the present status of cancer screening recommendations(beginning age, interval, recommended screening methods, etc.) by physicians and analyze the association between physician's characteristics and the content of their recommendations. METHODS: Data were collected from March 1 to April 30 of 1997, and 373 physicians who were from different hospital settings all over Korea were interviewed by telephone about their screening recommendations for stomach, cervical and breast cancer for those who provided cancer screening services. RESULTS: For stomach cancer screening, respondents recommended that cancer screening begin at 40 years of age(57.8%), with a 1 year interval(77.2%), and by gastrofibroscopy (86.2%). For cervical cancer screening, respondents recommended that cancer screening begin at 25 years of age(42.0%), with a 1 year interval(67.8%), and by using a Pap smear(100.0%). For breast cancer screening, respondents recommended that cancer screening begin at 35 years of age(38.7%), with a 1 year interval(57.3%), and by mammography (97.3%). CONCLUSIONS: To establish appropriate cancer screening recommendations for Korea, it may be useful to consider the above results concerning medical care providers.; Summary

The Effect of Screening of Stomach Cancer on Stage Shift.: Jung Wan Koo, Won Chul Lee, Cho Hyun Park, Ji Youn Han, In Sik Chung, Nam Sun Paik, Hoon Kyo Kim; Korean J Prev Med. 2000;33(1):25-30.

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Abstract PDF: OBJECTIVES
This study was performed to evaluate the effect of stage shift according to screening of stomach cancer. METHODS: Total 840 cases of stomach cancer patients, undergone a surgical operation at Department of Surgery, Kangnam St. Mary's Hospital, The Catholic University of Korea from Jan. 1989 to Dec. 1995, were reviewed by stomach cancer working sheet, and classified as asymptomatic and symptomatic group based on the presence of subjective symptoms on their hospital visit. Their histopathologic stages were analysed. We compared the histopathologic stages of asymptomatic stomach cancer patients with those of symptomatic patients. RESULTS: From the total of 840 patients, asymptomatic patients group comprised 28 cases (3.3%). Proportion of asymptomatic patients tended to increase from 1.9% in 1990, 0.9% in 1991 to 8.6% in 1995. Proportions of asymptomatic patients by stages were 78.6% (stage I), 3.6% (stage III), 17.9% (stage IV) and that of symptomatic patients by stages were 38.2% (stage I), 16.5% (stage II), 24.8% (stage III), 19.1% (stage IV). In less than 40 years old, 50.5% of symptomatic patients were diagnosed as stage I. With increment of ages, proportions of stage I were markedly decreased. It was significantly different between proportion of early gastric cancer in asymptomatic patients (60.1%) and that in symptomatic patients (25.0%). CONCLUSIONS: We confirmed stage shift according to screening of stomach cancer. And proportion of early gastric cancer in asymptomatic patients was higher than that in symptomatic patients. This results suggest that screening of gastric cancer be important to reduce mortality and it be indirectly started from 40 years old.; Summary

Comparison of Histopathologic Stages of Asymptomatic and Symptomatic Cervical Neoplasm Patients.: Hyeon Woo Yim, Won Chul Lee, In Young Hwang, Yong Il Kwon, Jong Sup Park, Hoon Kyp Kim; Korean J Prev Med. 1998;31(4):583-591.

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Abstract PDF: Screening is for the early detection and treatment of diseases in prior to development of symptoms, so that more favourable prognosis could be obtained. To evaluate efficiency of screening test for cervical neoplasms, we compared the histopathologic stages of asymptomatic cervical neoplasm patients diagnosed by screening test, with those of symptomatic patients confirmed by pathology. Total 1,120 cases of cervical neoplasm patient, diagnosed at Kang-nam St. Mary's hospital from Jan. 1990 to Dec. 1996, were reviewed by chart, and classified as asymptomatic and symptomatic group based on the presence of subjective symptoms on their hospital visit. Their histopathologic stages were analysed. The results were as follows, 1. From the total of 1,120 patient, asymptomatic group comprised 264 cases (25.5%). Asymptomatic proportion increased 15.3% in 1991 to 34.7% in 1996. 2. Mean age for the occurrence of cervical neoplasm was 44.3 +/- 10.4 years for the asymptomatic group, and 49.3+/-13.2 years for the symptomatic group, showing statistically significant differences(p=0.001). 3. Among the study subjects, 465 cases(45.0%) had CIS(carcinoma in situ), and 569 cases(55.0%) had invasive cancers. 4. Percentage of cervical neoplasm patient diagnosed at asymptomatic stages were 45.8% in twenties, 32.0% in thirties, 27.7 % in forties, 21.7% in fifties, 18.7% in sixties and 1.8% in above seventies, showing statistically significant differences according to age group(p=0.001). 5. In thirties, 87.2% of the asymptomatic patients were diagnosed as CIS and 45.0% of symptomatic patient were diagnosed as CIS. With increment of ages, CIS proportion were markedly decreased. 6. 76.9% of asymptomatic patients were diagnosed as CIS, and 34.0 % of symptomatic patients were diagnosed as CIS, suggesting screening test at asymptomatic stage can increase CIS proportion. 7. CIS proportion of asymptomatic patient was highest in thirties(40.4%) and 2nd highest in forties(34.0%). Screening test for cervical neoplasm should be actively carried out from the thirties.; Summary

Performance Ranges of the Neurobehavioral Core Test Battery among Female Workers Occupationally Not Exposed to Neurotoxic Agents in Manufacturing Industries.: Kyung Jae Lee, Se Hoon Lee, Hyoung Ah Kim, Won Chul Lee, Seong Sil Chang, Chung Yill Park, Chee Kyung Chung; Korean J Prev Med. 1995;28(4):911-923.

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Abstract PDF: With increased use of neurotoxic agents in manufacturing industries, hazardous effects of neurotoxic agents pose significant problems in protecting health of workers who work in these industries. A normal range of neurobehavioral performance is required 10 study hazardous effects of neurotoxic agents among workers. However, such reference for Korean population is not available yet. The objective of this study is to estimate a normal range of neurobehuvioral test performance of female workers in Korea. Data for neurobehavioral test performance developed by the world Health organization were obtained from 165 female workers. Study Subjects, 140 production workers and 25 clerks, who voluntarily participated in this study were not occupationally exposed to neurotoxic agents. The mean age and the mean education years of them were 32 years and 10.9 years, respectively. Santa Ana dexterity, pursuit aiming, digit symbol, simple reaction time, and Benton visual retention tests among the Neurobehavioral Core Test Battery(NCTB) were included in the evaluation. Subjects were interviewed by a trained interviewer for their detailed occupational history. Mean(+/-SD) performance of the participants were: 45.7+/-7.1 and 41.9+/-6.4 in the Santa Ana dexterity test of the preferred and non-preferred hands; 191.9+/-38.6 in correct dot of the pursuit aiming test; 57.7+/-16.0 in the digit symbol test; 274.8+/-44.6 msec in the mean simple reaction time and 70.5+/-69.0 msec in the mean standard deviation of it; and 7.8+/-1.7 in the Benton visual retention test. Most neurobehavioral performance scores were correlated significantly with age and educational level. Educational level was found to be a significant independent variable which was associated with all test scores. Age was significantly associated with scores of pursuit aiming and digit symbol tests.; Summary

Case-Control Study on Effects of Alcohol Intake and Smoking to Gastritis of Korean Adult Men.: Yun Chul Hong, Chung Yill Park, Won Chul Lee, Kang Sook Lee; Korean J Prev Med. 1992;25(3):238-246.

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Abstract PDF: We performed case-control studies for the 1, 138 Korean adult men. According to the results of UGIS, we classified the gastritis into the erosive gastritis, superficial gastritis, and hypertrophic gastritis. And then, we selected controls among non-gastritis group after matching. Alcohol intake and smoking history was obtained by questionnaire. And we observed the effects of alcohol intake and smoking to the each gastritis. The results obtained were as follows; 1. Smokers had a risk of getting erosive gastritis more than twice (2.6) than non-smokers and there was dose-response relationships between smoking and erosive gastritis. Alcohol intake, however, had no significant relation with the erosive gastritis. 2. Both smoking and alcohol intake had no significant relations with superficial gastritis. 3. Smoking had no significant relation with hypertrophic gastritis, but dividing between those who drank more than 100gm of alcohol a week and those who drank less, we obtained the odds ratio of 3. 4 suggesting that there existed a significant relation between moderate or excessive alcohol intake and hypertrophic gastritis. 4. Among the gastritis patients, those who had erosive gastritis smoked most heavily, and those who had hypertrophic gastritis drank most excessively.; Summary

Maternal Factors Associated with the Premature Rupture of Membrane in the Low Birth Weight Infant Deliveries.: Kang Sook Lee, Won Chul Lee, Kwang Ho Meng, Choong Hoon Lee, Soo Pyung Kim; Korean J Prev Med. 1988;21(2):207-216.

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Abstract PDF: Premature rupture of membrane is the most frequent cause of low birth weight infant delivery which increase the maternal and fetal morbidity and perinatal mortality. A retrospective case-control study was performed on 315 mothers who delivered low birth weight infants(< or = 2.5kg) with premature rupture of membrane and as control group 546 mothers who delivered normal birth weight infants(2.9-3.7kg) without premature rupture of membrane were chosen. The results obtained from this study were as follows: 1. The proportion of low birth weight infants due to premature rupture of membrane among all low birth weight infant deliveries was 14.5%, and this is equivalent to 1.1% among all deliveries. 2. The most significant maternal risk factor of low birth weight infant deliveries with premature rupture of membrane was infections on vagina, cervix and uterus during pregnancy. Compared with control, adjusted odds ratio was 7.61(95% confidence interval(CI) 1.88-30.88, p=0.004). Other significant maternal risk factors were the history of induced abortion, spontaneous abortion, and the experience of premature delivery. The risk ratios were 1.82, 2.07, 4.42, respectively. 3. Breech presentation did increase the risk of low birth weight infant delivery with infant delivery with premature rupture of membrane against control(Adjusted odds ratio=2.66, 95% CI 1.35-5.26, p=0.005). 4. Mothers who had not taken antenatal care were having higher risk of low birth weight infant delivery with premature rupture of membrane against control(Adjusted odds ratio=1.73, 95% CI 1.35-5.26, p=0.004). These study results show that maternal factors such as the infection of genital organs during pregnancy, the history of induced abortion and breech presentation are significantly associated with the premature rupture of membrane in the low birth weight deliveries, and that most of these risk factors are controllable ones through proper antenatal cares.; Summary

A Study on the Epedemiological Characteristics of Industrial Ocular Injuries.: Won Chul Lee, Sang Moon Chung, Kang Sook Lee, Kwang Ho Meng, Seung Han Lee; Korean J Prev Med. 1988;21(1):113-120.

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Abstract PDF: A total of 181 cases of industrial ocular injuries hospitalized and treated at the St. Mary's Hospital, Seoul during the 5-year period was studied on their epidemiological characteristics. Of there patients 96.7% were males, and 43.6% were in twenties, 49.7% of the cases were injured on left eyes. There were no statistically significant differences in frequencies of study subjects by day of the week and month of the year. Most common injury hour were between 10- < 12 AM(13.6%) and between 2- < 4 PM(20%). Of the total 101 cases, 37.6% were working less than 6 months, and 73.7%, less than 2 years. Of the total, 42.3% were involved in machinery work and 13.9%, in construction work. According to the American National Standard Method of recording basic facts relating to the nature and occurrence of work injuries, 62% among all source of injuries was metal item and the most common accident type was struck by flying objects(76.2%). Among 181 cases, only 2 cases wearing protective equipment when the accidents occurred.; Summary

The Study of the Influence of Induced Abortion on Secondary Infertility analyzed by Logistic Regression.: Won Chul Lee; Korean J Prev Med. 1982;15(1):179-186.

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Abstract PDF: The methods controlling the confounding factors were discussed using the data of secondary infertility with induced abortion. Mantel-Haenszel method and logistic model were applied in the analysis to find out which factors were confounding and/or effect modificaton variables. In the logistic analysis, the main effect of induced abortion, spontaneous abortion, age and interaction effect between induced abortion and spontaneous abortion werechosen as independent variables being regressed into logistic functions. Spontaneons abortion was interpreted as a potential confounder and at the same time potential effect modifier and age wasinterpreted as potential confounder. Spontaneous abortion was shown to be more important influencing factor than age to the secondary infertility. In the course of logistic analysis, the problem of parameter estimation and hypothesis testing, assessing the fitness of a model, and selection of the best model were briegy explained. For the program of logistic model, FUNCAT Procedure of SAS package was chosen.; Summary

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