위암의 조기검진에 의한 병기이전(stage shift) 효과

구정완,박조현,한지연,정인식,백남선,김훈교,이원철,Koo, Jung-Wan,Park, Cho-Hyun,Han, Ji-Youn,Chung, In-Sik,Paik, Nam-Sun,Kim, Hoon-Kyo,Lee, Won-Chul 대한예방의학회 2000 예방의학회지 Vol.33 No.1

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 makedly 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 if be indirectly started from 40 years old.

은행원의 VDT작업에 따른 피로자각증상

구정완,이승한,Koo, Jung-Wan,Lee, Seung-Han 대한예방의학회 1991 Journal of Preventive Medicine and Public Health Vol.24 No.3

In order to investigate industrial fatigue due to visual display terminal (VDT) work of banking operations the questionnaire survey for subjective symptoms of fatigue was carried out on 470 bank clerks who had been engaged in VDT work for various length of work hours. The questionnaires comprised three groups of 10 items each, representing dullness and sleepiness (level of cerebral activation), difficulty in concentration (level of motivation) and bodily projection of fatigue. The results were as follows : 1. Of the 30 items of questionnaires, the highest percentage was accounted for by 'eye strain' (51.5% ), followed by 'feel stiffness in the neck or the shoulders'(33.4%), 'feel a pain in the low back'(26.8%), 'whole body feels tired'(19.6%) and 'feel headache'(17.9%) in the order of sequence. 2. The average weighted score for the first group of questionnaire items (dullness and sleepiness) was the largest among three groups and was followed by 'the third cup (bodily projection of fatigue) and the second item group (difficulty in concentration) in the order of sequence, suggesting the heavier mental stress of VDT work in banking operations rather than physical burden. 3. In terms of the age and sex of workers, work duration and VDT work percentage, the difference in average weighted score was noted only between sex, the score of female being larger than that of male. 4. The complaint rates of subjective symptoms showed close associations with the subjective optimums of room temperature, ventilation, illumination and noise level. 5. The significant correlation was showed between age, work duration and item of 'whole body feels tired', between VDT work percentage and items of 'eye strain' and 'feel stiffness in the neck or shoulders' and between all items of subjective symptoms.

The Shape of Carcinogenesis Dose-Response Curves According to The Mutagenicity

Jung-Wan Koo(구정완),Frederick Parham,Kevin McGowan,Christopher J. Portier 대한산업의학회 2003 대한직업환경의학회 학술대회 논문집 Vol.30 No.-

The Association Between Biomarker-Based Exposure Estimates for Phthalates and Demographic Factors in a Human Reference Population

Jung-Wan Koo(구정완),Frederick Parham,Michael C. Kohn,Scott A. Masten,John W. Brock,Larry L. Needham,Christopher J. Portier 대한산업의학회 2003 대한직업환경의학회 학술대회 논문집 Vol.30 No.-

프탈레이트의 노출 정도 및 인구학적 특성과의 관련요인

구정완(Jung-Wan Koo),이강숙(Kang-Sook Lee),박정일(Chung-Yill Park),구현정(Hyun-Jung Koo),이병무(Byung Mu Lee) 한국독성학회 2003 Toxicological Research Vol.19 No.4

To investigate biomarker-based exposure to phthalates and related factors with demographics, 100 subjects who had participated in comprehensive health check-up were selected. We collected demographics through questionnaires and analyzed urine samples for 5 phthalates. Statistical likelihoods and regression methods were applied for data analysis using censored data. The highest<br/> levels of urine phthalates were 216㎍/ml in di-isodecyl phthalate, 29.0 mg/ml in di-butyl phthalate, 5.78㎍/ml in di-(2-ethylhexyl) phthalate. The median values of di-(2-ethylhexyl) phthalate were 0.2340㎍/ml for male smokers, 0.0399㎍/ml for male non-smokers and 0.0085 mg/ml for female non-smokers, respectively. Di-(2-ethylhexyl) phthalate, benzyl butyl phthalate and di-isodecyl phthalate were higher in males than in females. In addition, mono-2-ethylhexyl phthalate was decreased with age. Our findings suggest that there might be significant demographic variations in exposure and/or metabolism of phthalates, and that health-risk assessment for phthalate exposure in humans should consider different potential risk groups.

수상태양광 발전시스템 부교설비의 신뢰성 향상방안

정순원(Soon-Won Jung),구정완(Jung-Wan Koo),구경완(Kyung-Wan Koo) 대한전기학회 2019 대한전기학회 학술대회 논문집 Vol.2019 No.04

근골격계 질환의 의학적 접근

홍정연(Jung Yeon Hong),구정완(Jung?Wan Koo) 대한인간공학회 2010 大韓人間工學會誌 Vol.29 No.4

For the medical approaches of work-related musculoskeletal diseases, it is important to consider occupational relatedness and occupational fitness. Clinical approach includes physical examination, radiologic tests and other related tests and we should choose proper management which is suitable to workers' status for the prevention of early disease's progression and later disabilities. Also, it suggests that occupational prevention program consultation for work-related musculoskeletal diseases considering workers' variable circumstances should be done via occupational relatedness and occupational fitness.

시각과 청각을 통한 인지적 과제수행이 보행에 미치는 영향

김정수(Jung Su Kim),구정완(Jung Wan Koo) 대한인간공학회 2008 대한인간공학회 학술대회논문집 Vol.- No.-

The purpose of this study was to investigate how walking performance is affected by visual and auditory cognitive tasks. Thirty-one subjects, 16 women and 15 men, between the ages of 22 and 32 years participated in the study. A dual-task paradigm was used. Each subject performed the following single and dual walking tasks: walking alone, walking while verbally report the sums of pairs of single-digit numbers presented through either a computer speaker(auditorily) or a screen(visually) while walking. Gait parameters(gait velocity, cadence, step length, stride length, step time, stride time, swing time, stance time, single support time, double support time, base of support) were measured by GAITRite electric gaitway system. The results were as follow : 1. Gait velocity, cadence, step length, stride length decreased, while step time, stride time, swing time, stance time, single support time, double support time increased under all dual-task walking conditions compared to the single-task walking condition. 2. Gait parameters were no different between auditory cognitive task walking condition and visual cognitive task walking condition. 3. The cognitive task(summing) performance decreased under auditory task walking condition. These findings indicated that visual and auditory cognitive tasks affected walking performance, but there were no difference between visual and auditory cognitive task walking conditions. The cognitive task performance was only affected by auditory cognitive task, and this result revealed that auditory stimuli require more attention than visual stimuli. These results have implications for human interface(e.g. use of mobile phones) while walking and baseline of further research for cognitive task walking.

일개 대학병원 간호사의 근골격계 부담작업 분석

정은희,구정완,Jeong, Eun-Hee,Koo, Jung­Wan 대한인간공학회 2006 大韓人間工學會誌 Vol.25 No.3

Severities of musculoskeletal diseases (MSDs) have been recognized at the regular work such as manufacturing but incidence of MSDs are increasing also at the atypical work. The examples of those are health medical workers, office workers and service workers etc. Nurses among health medical workers are accomplishing to manage and recover the patients' health in the first place. Therefore, they are exposed to very stressful work conditions during caring the patients. This study was performed to analyze the musculoskeletal burdened work among nurses at a university hospital, in order to grasp the realities of the MSDs, analyze and prevent MSDs. We surveyed risk factors for ward, intensive care unit, delivery room, newborn room, operation room, function test room and central supply room at a university hospital in Seoul. It was executed for 2 months as the field study that was composed of simulation, real measurement, work motion assessment and subjective assessment. And the results were analyzed into ergonomics techniques. Works according to the criteria of musculoskeletal burdened work by the Ministry of Labor were scrub in operation room and heart ultrasonic function test. And a lot of works that need attention and management were also detected. So it should be required the education and systematic managements of MSDs for nurses.

사회심리적 건강측정도구를 이용한 사무직 및 생산직 근로자들에서의 스트레스 평가

허성옥,장성실,구정완,박정일,Hur, Seong-Ouk,Chang, Seong-Sil,Koo, Jung-Wan,Park, Chung-Yill 대한예방의학회 1996 Journal of Preventive Medicine and Public Health Vol.29 No.3

This study was conducted to evaluate the degree of stress state and the risk factors related to in 967 white collar workers and 275 blue collar workers by using Psycosocial Well-being Index. The results obtained were as follows : 1. In the white collar workers and blue collar workers, young age, low education and low income groups had high scores of stress, while in white collar workers, female had high scores of stress but in blue collar workers, male had high scores of stress. 2. According to psychosocial well-being index, mild stress sto were 73.9% and 53.1%, high risk stress state were 8.9% and 44.4%, and healthy state were 17.2% and 2.6% in white collar and blue collar workers respectively. 3. The total stress score was highly associated with the factors of depression, social performance and self-confidence, general well-being and vitality, and sleeping disturbance and anxiety in order. 4. In reliability test of stress factors, Cronbach's $\alpha$ coefficients of depression, social performance and self-confidence, general well-being and vitality, and sleeping disturbance and anxiety were 0.89, 0.81, 0.79, and 0.74 respectively. In conclusion, it suggested that age, sex, marital status, income, education, sleeping time, smoking and exercise habit were associated with stress score, all of the above factors should considered to occupational health.