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Choi SM, Kim CW, Park HO, Park YT. Association between unpredictable work schedule and work-family conflict in Korea. Ann Occup Environ Med 2023; 35:e46. [PMID: 38148922 PMCID: PMC10751215 DOI: 10.35371/aoem.2023.35.e46] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2023] [Revised: 09/21/2023] [Accepted: 10/26/2023] [Indexed: 12/28/2023] Open
Abstract
Background As unpredictable work schedule (UWS) has increased worldwide, various studies have been conducted on the resulting health effects on workers. However, research on the effect of UWS on workers' well-being in Korea is still insufficient. This study aimed to investigate the relationship between UWS and work-family conflict (WFC) using 6th Korean Working Conditions Survey (KWCS). Methods Both UWS and WFC were measured using self-reported questionnaires, using data from the 6th KWCS conducted between 2020 and 2021, including 31,859 participants. UWS was measured by questions regarding the frequency of changes in work schedules and limited advanced notice. WFC was measured by questions regarding work to family and family to work conflicts. Logistic regression analysis was conducted to investigate the association between UWS and WFC. Results The prevalence of UWS was higher among men, those under 40 years old, service and sales workers and blue-collar workers, and those with higher salaries. Workplace size also influenced UWS prevalence, with smaller workplaces (less than 50 employees) showing a higher prevalence. The odds ratio (OR) for WFC was significantly higher in workers with UWS compared to workers without UWS after adjusting for gender, age, marital status, occupation, salary, education, weekly working hours, shift work, company size, and having a child under the age of 18 years, employment status (OR: 3.71; 95% confidence interval: 3.23-4.25). Conclusions The analysis of nationwide data revealed that UWS interferes with workers' performance of family roles, which can lead to WFC. Our findings suggest that it is crucial to implement policies to address unfair work schedule management, promoting a healthier work-life balance and fostering a conducive environment for family responsibilities.
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Affiliation(s)
- Sang Moon Choi
- Department of Occupational and Environmental Medicine, Samsung Changwon Hospital, Sungkyunkwan University School of Medicine, Changwon, Korea
| | - Chan Woo Kim
- Department of Occupational and Environmental Medicine, Samsung Changwon Hospital, Sungkyunkwan University School of Medicine, Changwon, Korea
| | - Hyoung Ouk Park
- Department of Occupational and Environmental Medicine, Samsung Changwon Hospital, Sungkyunkwan University School of Medicine, Changwon, Korea
| | - Yong Tae Park
- Department of Occupational and Environmental Medicine, Samsung Changwon Hospital, Sungkyunkwan University School of Medicine, Changwon, Korea
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Lim JW, Kim CW, Park HO, Chung EY, Chae C, Son J, Shin YH, Park SH, Choi SM. Association between shift work and serum homocysteine level in female electronic manufacturing services workers. Ann Occup Environ Med 2023; 35:e4. [PMID: 37063598 PMCID: PMC10089812 DOI: 10.35371/aoem.2023.35.e4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2022] [Revised: 12/27/2022] [Accepted: 02/06/2023] [Indexed: 03/29/2023] Open
Abstract
Background Shift work has been shown to increase the risk of cardiovascular disease (CVD) based on several evidences. The classic risk factors of CVD include age, hypertension, smoking, obesity and diabetes. Recently, the serum homocysteine level has been reported to be a valuable indicator of CVD risk. This study aimed to determine the variation in serum homocysteine level as a cardiovascular risk indicator among female workers according to shift work. Methods The data of regular health examination of workers at an electronic manufacturing services company in Yeongnam region, South Korea in 2019 were examined in this study. The investigation was based on a cross-sectional study conducted on 697 female workers (199 day workers and 498 shift workers). The sociodemographic and biochemical characteristics were compared between day workers and shift workers. Through a logistic regression analysis, the odds ratio (OR) of the increased serum homocysteine level in relation to shift work was determined. Results Compared to female day workers, female shift workers showed significantly higher level of serum homocysteine (8.85 ± 2.16 vs. 9.42 ± 2.04 μmol/mL; p = 0.001). The OR of day workers against shift workers was 1.81 (95% confidence interval [CI]: 1.25-2.63). With the adjustment of variables that may influence the level of serum homocysteine, the adjusted OR was 1.68 (95% CI: 1.09-2.60). Conclusions The serum homocysteine level was significantly higher in shift workers than in day workers. It is thus likely to be a useful predictor of CVD in shift workers.
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Jung JI, Son JS, Kim YO, Chae CH, Kim CW, Park HO, Lee JH, Shin YH, Ha JC. Changes of depression and job stress in workers after merger without downsizing. Ann Occup Environ Med 2018; 30:54. [PMID: 30181882 PMCID: PMC6114831 DOI: 10.1186/s40557-018-0266-4] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2018] [Accepted: 08/07/2018] [Indexed: 11/10/2022] Open
Abstract
Background Since the 1980s, restructuring, which includes downsizing, closures, mergers, and privatization, has expanded worldwide, and various studies have investigated its effect on health. However, previous studies have mainly focused on restructuring accompanied by massive lay-offs, and the effect of a merger on workers’ health is still controversial. This study aims to investigate changes in worker depression and job stress after a merger without downsizing, which is unusual in Korea. Methods Repeated surveys were done in April 2014, April 2015, and April 2016 involving the participation of 209 subjects. Participants were divided into two groups, which were comprised of blue-collar workers (104) and white-collar workers (105). Sociodemographic characteristics, including age, education level, job tenure, gender, marital status, smoking status, and alcohol consumption, were measured via a survey. To determine the level of depression, the Korean version of the Center for Epidemiologic Studies Depression Scale (CES-D) was employed, and to investigate job stress, the Korean Occupational Stress Scale-Short Form (KOSS-SF) was used. For statistical analyses, Pearson’s chi-square test, the Student’s t-test, and repeated measure analysis of variance (ANOVA) were performed. Results The results showed that depression (CES-D, F[2, 400] = 0.466, p = 0.628) was changed but without significance and job stress (KOSS-SF, F[1.899, 379.831] = 3.192, p = 0.045) were significantly different. The between-group difference in the CES-D score between the blue- and white-collar workers by survey administration time was not statistically significant (F = 0.316, p = 0.574). The interaction between the survey time and occupational group was also not statistically significant (F = 0.967, p = 0.381). The between-group difference in the KOSS-SF total score was not statistically significant (F = 1.132, p = 0.289), and the interaction between the survey administration time and occupational group was also not significant (F = 0.817, p = 0.437). In the job stress subgroup analyses Job insecurity and Lack of reward showed a significant difference by survey administration time. Conclusion This study showed that a merger without massive downsizing can cause negative health effects such as an changes in depression and increase in job stress. To improve the health of workers, both the immediate negative effects on health, and the long-term effects or their resolution over time should be considered prior to the merger.
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Affiliation(s)
- Jun Ick Jung
- Department of Occupational and Environmental Medicine, Samsung Changwon hospital, Sungkyunkwan University School of Medicine, 158, Paryong-ro, Masanhoewon-gu, Changwon-si, Gyeongsangnam-do 51353 Republic of Korea
| | - Jun Seok Son
- Department of Occupational and Environmental Medicine, Samsung Changwon hospital, Sungkyunkwan University School of Medicine, 158, Paryong-ro, Masanhoewon-gu, Changwon-si, Gyeongsangnam-do 51353 Republic of Korea
| | - Young Ouk Kim
- Department of Occupational and Environmental Medicine, Samsung Changwon hospital, Sungkyunkwan University School of Medicine, 158, Paryong-ro, Masanhoewon-gu, Changwon-si, Gyeongsangnam-do 51353 Republic of Korea
| | - Chang Ho Chae
- Department of Occupational and Environmental Medicine, Samsung Changwon hospital, Sungkyunkwan University School of Medicine, 158, Paryong-ro, Masanhoewon-gu, Changwon-si, Gyeongsangnam-do 51353 Republic of Korea
| | - Chan Woo Kim
- Department of Occupational and Environmental Medicine, Samsung Changwon hospital, Sungkyunkwan University School of Medicine, 158, Paryong-ro, Masanhoewon-gu, Changwon-si, Gyeongsangnam-do 51353 Republic of Korea
| | - Hyoung Ouk Park
- Department of Occupational and Environmental Medicine, Samsung Changwon hospital, Sungkyunkwan University School of Medicine, 158, Paryong-ro, Masanhoewon-gu, Changwon-si, Gyeongsangnam-do 51353 Republic of Korea
| | - Jun Ho Lee
- Department of Occupational and Environmental Medicine, Samsung Changwon hospital, Sungkyunkwan University School of Medicine, 158, Paryong-ro, Masanhoewon-gu, Changwon-si, Gyeongsangnam-do 51353 Republic of Korea
| | - Young Hoo Shin
- Department of Occupational and Environmental Medicine, Samsung Changwon hospital, Sungkyunkwan University School of Medicine, 158, Paryong-ro, Masanhoewon-gu, Changwon-si, Gyeongsangnam-do 51353 Republic of Korea
| | - Jea Chul Ha
- Department of Occupational and Environmental Medicine, Samsung Changwon hospital, Sungkyunkwan University School of Medicine, 158, Paryong-ro, Masanhoewon-gu, Changwon-si, Gyeongsangnam-do 51353 Republic of Korea
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Jung YS, Chae CH, Kim YO, Son JS, Kim CW, Park HO, Lee JH, Shin YH, Kwak HS. The relationship between serum vitamin D levels and sleep quality in fixed day indoor field workers in the electronics manufacturing industry in Korea. Ann Occup Environ Med 2017; 29:25. [PMID: 28652922 PMCID: PMC5482959 DOI: 10.1186/s40557-017-0187-7] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2017] [Accepted: 06/18/2017] [Indexed: 12/19/2022] Open
Abstract
Background Although recent studies have investigated the influence of vitamin D on sleep patterns, there is a lack of research on the relationship between vitamin D and sleep patterns in Korean workers. This study focused on the relationship between serum vitamin D levels and sleep in fixed day indoor field workers in the electronics manufacturing industry in Korea. Methods The 1472 subjects who were included in this study were selected from fixed day workers in the electronics manufacturing industry who had received a worker’s special health examination at a hospital in Changwon, South Gyeongsang Province between January 2015 and December 2015. Nighttime workers and those who showed symptoms of depression were excluded from this study. The sociodemographic and lifestyle variables of the participants were investigated, including age, sex, marital status, level of education, body mass index, smoking habits, alcohol consumption habits, and regular exercise. Work-related factors were evaluated, such as employee tenure and occupational stress. Serum 25-hydroxyvitamin D was measured as an indicator of vitamin D levels, and quality of sleep was evaluated using the Pittsburgh Sleep Quality Index (PSQI) translated into Korean. Results The subjects had a mean serum vitamin D level of 13.70 ± 5.93 ng/mL. Vitamin D deficiency, defined as a serum vitamin D level of <10 ng/mL, was found in 24.8% of males and significantly more frequently in females (47.6%). Poor sleep quality was reported by 19.8% of participants with serum vitamin D levels ≥10 ng/mL and by 21.7% of those with serum vitamin D levels <10 ng/mL, which was a significant difference (P = .007). Multiple logistic regression analysis adjusting for significant variables found that poor sleep quality was more likely in those with vitamin D deficiency than those with higher serum vitamin D levels (odds ratio = 1.36; 95% CI, 1.01–1.82). A comparison of serum vitamin D levels and PSQI components showed that the mean scores for subjective sleep quality, sleep latency, and sleep duration were significantly higher in the vitamin D-deficient participants, indicating that the vitamin D-deficient participants had poorer sleep quality. Conclusions This study investigated serum vitamin D levels in fixed day indoor field workers in the manufacturing industry in Korea and analyzed the relationship of vitamin D deficiency with sleep quality. A significant correlation was found between serum vitamin D deficiency and poor sleep quality. Based on the results of this study, sleep disorder management for workers can be improved by providing regular examinations checking their serum vitamin D levels and supplying vitamin D to workers with serum vitamin D deficiency to enhance their quality of sleep.
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Affiliation(s)
- Young Saeng Jung
- Department of Occupational and Environmental Medicine, Samsung Changwon Medical Center, Sungkyunkwan University School of Medicine, Changwon City, Republic of Korea
| | - Chang Ho Chae
- Department of Occupational and Environmental Medicine, Samsung Changwon Medical Center, Sungkyunkwan University School of Medicine, Changwon City, Republic of Korea
| | - Young Ouk Kim
- Department of Occupational and Environmental Medicine, Samsung Changwon Medical Center, Sungkyunkwan University School of Medicine, Changwon City, Republic of Korea
| | - Jun Seok Son
- Department of Occupational and Environmental Medicine, Samsung Changwon Medical Center, Sungkyunkwan University School of Medicine, Changwon City, Republic of Korea
| | - Chan Woo Kim
- Department of Occupational and Environmental Medicine, Samsung Changwon Medical Center, Sungkyunkwan University School of Medicine, Changwon City, Republic of Korea
| | - Hyoung Ouk Park
- Department of Occupational and Environmental Medicine, Samsung Changwon Medical Center, Sungkyunkwan University School of Medicine, Changwon City, Republic of Korea
| | - Jun Ho Lee
- Department of Occupational and Environmental Medicine, Samsung Changwon Medical Center, Sungkyunkwan University School of Medicine, Changwon City, Republic of Korea
| | - Young Hoo Shin
- Department of Occupational and Environmental Medicine, Samsung Changwon Medical Center, Sungkyunkwan University School of Medicine, Changwon City, Republic of Korea
| | - Ho Sung Kwak
- Department of Occupational and Environmental Medicine, Samsung Changwon Medical Center, Sungkyunkwan University School of Medicine, Changwon City, Republic of Korea
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Kim JY, Chae CH, Kim YO, Son JS, Kim JH, Kim CW, Park HO, Lee JH, Kwon SI. Erratum to: The relationship between quality of sleep and night shift rotation interval. Ann Occup Environ Med 2016; 28:6. [PMID: 26816617 PMCID: PMC4727257 DOI: 10.1186/s40557-016-0090-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] Open
Affiliation(s)
- Jae Youn Kim
- Department of Occupational & Environmental Medicine, School of Medicine, Sungkyunkwan University, Samsung Changwon Hospital, 158, Paryong-ro, Changwon-si, 51353 Changwon, Gyeongsangnam-do Korea (Republic)
| | - Chang Ho Chae
- Department of Occupational & Environmental Medicine, School of Medicine, Sungkyunkwan University, Samsung Changwon Hospital, 158, Paryong-ro, Changwon-si, 51353 Changwon, Gyeongsangnam-do Korea (Republic)
| | - Young Ouk Kim
- Department of Occupational & Environmental Medicine, School of Medicine, Sungkyunkwan University, Samsung Changwon Hospital, 158, Paryong-ro, Changwon-si, 51353 Changwon, Gyeongsangnam-do Korea (Republic)
| | - Jun Seok Son
- Department of Occupational & Environmental Medicine, School of Medicine, Sungkyunkwan University, Samsung Changwon Hospital, 158, Paryong-ro, Changwon-si, 51353 Changwon, Gyeongsangnam-do Korea (Republic)
| | - Ja Hyun Kim
- Department of Occupational & Environmental Medicine, School of Medicine, Sungkyunkwan University, Samsung Changwon Hospital, 158, Paryong-ro, Changwon-si, 51353 Changwon, Gyeongsangnam-do Korea (Republic)
| | - Chan Woo Kim
- Department of Occupational & Environmental Medicine, School of Medicine, Sungkyunkwan University, Samsung Changwon Hospital, 158, Paryong-ro, Changwon-si, 51353 Changwon, Gyeongsangnam-do Korea (Republic)
| | - Hyoung Ouk Park
- Department of Occupational & Environmental Medicine, School of Medicine, Sungkyunkwan University, Samsung Changwon Hospital, 158, Paryong-ro, Changwon-si, 51353 Changwon, Gyeongsangnam-do Korea (Republic)
| | - Jun Ho Lee
- Department of Occupational & Environmental Medicine, School of Medicine, Sungkyunkwan University, Samsung Changwon Hospital, 158, Paryong-ro, Changwon-si, 51353 Changwon, Gyeongsangnam-do Korea (Republic)
| | - Soon Il Kwon
- Department of Occupational & Environmental Medicine, School of Medicine, Sungkyunkwan University, Samsung Changwon Hospital, 158, Paryong-ro, Changwon-si, 51353 Changwon, Gyeongsangnam-do Korea (Republic)
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Kim JY, Chae CH, Kim YO, Son JS, Kim JH, Kim CW, Park HO, Lee JH, Kwon SI, Kwon SI. The relationship between quality of sleep and night shift rotation interval. Ann Occup Environ Med 2015; 27:31. [PMID: 26688731 PMCID: PMC4683722 DOI: 10.1186/s40557-015-0084-x] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2015] [Accepted: 12/07/2015] [Indexed: 01/31/2023] Open
Abstract
Background Shift work is closely related with workers' health. In particular, sleep is thought to be affected by shift work. In addition, shift work has been reported to be associated with the type or direction of shift rotation, number of consecutive night shifts, and number of off-duty days. We aimed to analyze the association between the night shift rotation interval and the quality of sleep reported by Korean female shift workers. Methods In total, 2,818 female shift workers from the manufacturing industry who received an employee physical examination at a single university hospital from January to August in 2014 were included. Subjects were classified into three groups (A, B, and C) by their night shift rotation interval. The quality of sleep was measured using the Korean version of the Pittsburgh Sleep Quality Index (PSQI). Descriptive analysis, univariate logistic regression, and multivariate logistic regression were performed. Results With group A as the reference, the odds ratio (OR) for having a seriously low quality of sleep was 1.456 (95% CI 1.171–1.811) and 2.348 (95% CI 1.852–2.977) for groups B and C, respectively. Thus, group C with the shortest night shift rotation interval was most likely to have a low quality of sleep. After adjustment for age, obesity, smoking status, alcohol consumption, exercise, being allowed to sleep during night shifts, work experience, and shift work experience, groups B and C had ORs of 1.419 (95% CI 1.134–1.777) and 2.238 (95% CI 1.737–2.882), respectively, compared to group A. Conclusion Our data suggest that a shorter night shift rotation interval does not provide enough recovery time to adjust the circadian rhythm, resulting in a low quality of sleep. Because shift work is influenced by many different factors, future studies should aim to determine the most optimal shift work model and collect accurate, prospective data.
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Affiliation(s)
- Jae Youn Kim
- Department of Occupational & Environmental Medicine, Samsung Changwon Hospital, School of Medicine, Sungkyunkwan University, 158, Paryong-ro, Changwon-si, 51353 Gyeongsangnam-do Korea (Republic)
| | - Chang Ho Chae
- Department of Occupational & Environmental Medicine, Samsung Changwon Hospital, School of Medicine, Sungkyunkwan University, 158, Paryong-ro, Changwon-si, 51353 Gyeongsangnam-do Korea (Republic)
| | - Young Ouk Kim
- Department of Occupational & Environmental Medicine, Samsung Changwon Hospital, School of Medicine, Sungkyunkwan University, 158, Paryong-ro, Changwon-si, 51353 Gyeongsangnam-do Korea (Republic)
| | - Jun Seok Son
- Department of Occupational & Environmental Medicine, Samsung Changwon Hospital, School of Medicine, Sungkyunkwan University, 158, Paryong-ro, Changwon-si, 51353 Gyeongsangnam-do Korea (Republic)
| | - Ja Hyun Kim
- Department of Occupational & Environmental Medicine, Samsung Changwon Hospital, School of Medicine, Sungkyunkwan University, 158, Paryong-ro, Changwon-si, 51353 Gyeongsangnam-do Korea (Republic)
| | - Chan Woo Kim
- Department of Occupational & Environmental Medicine, Samsung Changwon Hospital, School of Medicine, Sungkyunkwan University, 158, Paryong-ro, Changwon-si, 51353 Gyeongsangnam-do Korea (Republic)
| | - Hyoung Ouk Park
- Department of Occupational & Environmental Medicine, Samsung Changwon Hospital, School of Medicine, Sungkyunkwan University, 158, Paryong-ro, Changwon-si, 51353 Gyeongsangnam-do Korea (Republic)
| | - Jun Ho Lee
- Department of Occupational & Environmental Medicine, Samsung Changwon Hospital, School of Medicine, Sungkyunkwan University, 158, Paryong-ro, Changwon-si, 51353 Gyeongsangnam-do Korea (Republic)
| | - Soon Il Kwon
- Department of Occupational & Environmental Medicine, Samsung Changwon Hospital, School of Medicine, Sungkyunkwan University, 158, Paryong-ro, Changwon-si, 51353 Gyeongsangnam-do Korea (Republic)
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Kwon SI, Son JS, Kim YO, Chae CH, Kim JH, Kim CW, Park HO, Lee JH, Jung JI. Association between serum vitamin D and depressive symptoms among female workers in the manufacturing industry. Ann Occup Environ Med 2015; 27:28. [PMID: 26693028 PMCID: PMC4676810 DOI: 10.1186/s40557-015-0083-y] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2015] [Accepted: 12/03/2015] [Indexed: 12/23/2022] Open
Abstract
Background Vitamin D has been known to maintain the body’s balance of calcium and phosphorus as well as skeletal health. There has been increasing emphasis on the importance of vitamin D as recent studies have been reporting the specific functions of vitamin D in the cerebral nervous system and the association between the level of serum vitamin D and depressive symptoms. However, there is currently a paucity of research investigating the association between serum vitamin D and depressive symptoms in Korean subjects. Consequently, this study has aimed to determine the level of serum vitamin D and explore the association between serum vitamin D and depressive symptoms in Korean female workers. Method A medical examination, questionnaire, anthropometric measurements, and a blood test were conducted between February 3 and March 7, 2014 in 1054 subjects among female workers in the manufacturing industry who underwent physical examinations in a university hospital. From this data, we identified the level of serum vitamin D and investigated the association between serum vitamin D deficiency and depressive symptoms. Results The average serum vitamin D level of the 1054 subjects was 9.07 ± 3.25 ng/mL, and the number of subjects in the serum vitamin D deficiency group with less than 10 ng/mL was 721 (68.4 %). The odds ratio of the depressive symptom group with a CES-D score of 16 or above being in the deficiency group with a serum vitamin D level less than 10 ng/mL was found to be 1.55 (95 % CI = 1.15–2.07). Conclusion 68.4 % of female workers in the manufacturing industry were in the deficiency group with serum vitamin D levels less than 10 ng/mL. Additionally, we identified an association between serum vitamin D deficiency and depressive symptoms. In the future, if serum vitamin D deficiency is checked regularly in workers, we expect to achieve better outcomes in managing their depressive symptoms.
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Affiliation(s)
- Soon Il Kwon
- Department of Occupational and Environmental Medicine, Samsung Changwon Medical Center, Sungkyunkwan University School of Medicine, Changwon City, Republic of Korea
| | - Jun Seok Son
- Department of Occupational and Environmental Medicine, Samsung Changwon Medical Center, Sungkyunkwan University School of Medicine, Changwon City, Republic of Korea
| | - Young Ouk Kim
- Department of Occupational and Environmental Medicine, Samsung Changwon Medical Center, Sungkyunkwan University School of Medicine, Changwon City, Republic of Korea
| | - Chang Ho Chae
- Department of Occupational and Environmental Medicine, Samsung Changwon Medical Center, Sungkyunkwan University School of Medicine, Changwon City, Republic of Korea
| | - Ja Hyun Kim
- Department of Occupational and Environmental Medicine, Samsung Changwon Medical Center, Sungkyunkwan University School of Medicine, Changwon City, Republic of Korea
| | - Chan Woo Kim
- Department of Occupational and Environmental Medicine, Samsung Changwon Medical Center, Sungkyunkwan University School of Medicine, Changwon City, Republic of Korea
| | - Hyoung Ouk Park
- Department of Occupational and Environmental Medicine, Samsung Changwon Medical Center, Sungkyunkwan University School of Medicine, Changwon City, Republic of Korea
| | - Jun Ho Lee
- Department of Occupational and Environmental Medicine, Samsung Changwon Medical Center, Sungkyunkwan University School of Medicine, Changwon City, Republic of Korea
| | - Jun Ick Jung
- Department of Occupational and Environmental Medicine, Samsung Changwon Medical Center, Sungkyunkwan University School of Medicine, Changwon City, Republic of Korea
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Lee KH, Ho Chae C, Ouk Kim Y, Seok Son J, Kim JH, Woo Kim C, Ouk Park H, Ho Lee J, Saeng Jung Y. Anxiety symptoms and occupational stress among young Korean female manufacturing workers. Ann Occup Environ Med 2015; 27:24. [PMID: 26568830 PMCID: PMC4644331 DOI: 10.1186/s40557-015-0075-y] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2015] [Accepted: 09/21/2015] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND The prevalence of anxiety disorders has been increasing in South Korea, with recent studies reporting anxiety disorders as the most common mental disorder among all South Korean females. Anxiety disorders, which are independent risk factors of suicidal ideation and suicide attempts, are significantly correlated with productivity loss, high medical costs, impaired work performance, and frequent worker absence, and thus are potentially serious problems affecting the health of South Korean female workers. In previous studies, anxiety disorders were shown to have a significant correlation with occupational stress. This study seeks to examine the prevalence of anxiety symptoms as well as the relationship between occupational stress and anxiety symptoms among South Korean female manufacturing workers. METHODS A structured self-reported questionnaire was administered to 1,141 female workers at an electrical appliance manufacturing plant. The questionnaire collected data on general characteristics, health behaviors, sleep quality, job characteristics (shift work, shift work schedule, and job tenure), occupational stress, and anxiety symptoms. Sleep quality was measured using the Pittsburgh Sleep Quality Index, occupational stress with the Korean Occupational Stress Scale-Short Form (KOSS-SF), and anxiety symptoms with the Korean version of the Beck Anxiety Inventory. A chi square test was conducted to determine the distribution differences in anxiety symptoms based on general characteristics, health behaviors, job characteristics, and sleep quality. A linear-by-linear association test was used to determine the distribution differences between anxietysymptoms and the levels of occupational stress. Last, logistic regression analysis was used in order to determine the association between occupational stress and anxiety symptoms. RESULTS The prevalence of anxiety symptoms was 15.2 %. In the multivariate logistic regression analysis that adjusted for sleep quality and general characteristics, a significantassociation was found for those with anxiety disorders; the odds ratios (OR) were significantly higher the greater the total KOSS-SF score (moderate-risk group OR=2.85, 95 % CI=1.79-4.56; high-risk group OR=5.34, 95 % CI=3.59-7.96). In addition, excluding insufficient job control, all other KOSS-SF subscales were significantly associated with anxiety symptoms, and a relatively high OR was seen in the high-risk group for job demand (OR=3.19, 95 % CI=2.27-4.49), job insecurity (OR=4.52, 95 % CI=2.86-7.13), and occupational culture (OR=4.52, 95 % CI=2.90-7.04). CONCLUSION There was a significant association between anxiety symptoms and occupational stress stemming from the psychosocial work environment among these South Korean female manufacturing workers. Future longitudinal studies are needed to examine the association between the occupational stress caused by the psychosocial work environment and the incidence of anxiety disorders and anxiety symptoms. Furthermore, intervention programs that aim to address the prevalence of anxiety symptoms and improve the psychosocial work environment, especially for younger female manufacturing workers, are needed.
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Affiliation(s)
- Kang Ho Lee
- Department of occupational and environmental medicine, Changwon Samsung Hospital, Sungkyunkwan College of Medicine, Changwon City, Republic of Korea
| | - Chang Ho Chae
- Department of occupational and environmental medicine, Changwon Samsung Hospital, Sungkyunkwan College of Medicine, Changwon City, Republic of Korea
| | - Young Ouk Kim
- Department of occupational and environmental medicine, Changwon Samsung Hospital, Sungkyunkwan College of Medicine, Changwon City, Republic of Korea
| | - Jun Seok Son
- Department of occupational and environmental medicine, Changwon Samsung Hospital, Sungkyunkwan College of Medicine, Changwon City, Republic of Korea
| | - Ja-Hyun Kim
- Department of occupational and environmental medicine, Changwon Samsung Hospital, Sungkyunkwan College of Medicine, Changwon City, Republic of Korea
| | - Chan Woo Kim
- Department of occupational and environmental medicine, Changwon Samsung Hospital, Sungkyunkwan College of Medicine, Changwon City, Republic of Korea
| | - Hyoung Ouk Park
- Department of occupational and environmental medicine, Changwon Samsung Hospital, Sungkyunkwan College of Medicine, Changwon City, Republic of Korea
| | - Jun Ho Lee
- Department of occupational and environmental medicine, Changwon Samsung Hospital, Sungkyunkwan College of Medicine, Changwon City, Republic of Korea
| | - Young Saeng Jung
- Department of occupational and environmental medicine, Changwon Samsung Hospital, Sungkyunkwan College of Medicine, Changwon City, Republic of Korea
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Kim MS, Kim SH, Kim HJ, Hoang IN, Oh WM, Koh JT, Park HO, Jeong JY, Kim WJ, Lee EJ, Koh JY, Kim BY, Jensen RH. Characterization of the TSU-PR1 cell line by chromosome painting and flow cytometry. ACTA ACUST UNITED AC 2006; 163:17-22. [PMID: 16271951 DOI: 10.1016/j.cancergencyto.2005.04.010] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2005] [Revised: 04/07/2005] [Accepted: 04/08/2005] [Indexed: 10/25/2022]
Abstract
TSU-PR1 was originally reported as a prostatic carcinoma cell line derived from a lymph node metastasis. Recently, however, this cell line was reported to be derived from T24 bladder carcinoma cells, and thus further definition of its origin is needed. Conventional cytogenetic study of TSU-PR1 showed aneuploidy, ranging from 65 to 86 chromosome with a modal number of 80, and with 10 marker chromosomes, thus conventional cytogenetics cannot be used to determine which chromosomes or regions of chromosomes are critical in cancer development and progression of this cell line. The present study was conducted to characterize genetic changes of the cell line using comparative genomic hybridization (CGH), fluorescence in situ hybridization (FISH), and flow cytometry. CGH results showed that green-to-red fluorescence ratios were within the range of 0.85-1.15, except for a few chromosomes, which reflected near tetraploidy in TSU-PR1. Flow cytometric analysis of TSU-PR1 revealed a DNA index of 3.46n, which is close to the 3.48n calculated from a modal number of 80. The copy numbers of chromosomes 4, 6, 7, 17, and 20 determined by the DNA index and the CGH analyses were 2.85 +/- 0.09, 3.22 +/- 0.77, 3.01 +/- 0.26, 4.05 +/- 0.44, and 4.99 +/- 0.48, respectively. These numbers are also in accordance with the chromosome copy numbers determined with FISH: 2.98 +/- 0.23, 2.91 +/- 0.44, 2.74 +/- 0.44, 3.93 +/- 0.38, and 5.05 +/- 0.78 for chromosomes 4, 6, 7, 17, and 20, respectively (P > 0.05).
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Affiliation(s)
- M S Kim
- Dental Science Research Institute, Department of Oral Anatomy, School of Dentistry, Chonnam National University, Yongbongdong, Gwangju 500-757, Republic of Korea
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Kim SK, Park HO, Shim SC. Photochemical and photobiological properties of new bispsoralen derivatives (Bis[PsCn]PIP, n = 4, 6, 8). Photochem Photobiol 2000; 72:472-6. [PMID: 11045717 DOI: 10.1562/0031-8655(2000)072<0472:pappon>2.0.co;2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Bispsoralen derivatives possessing two psoralens and one piperazine molecule, 1,4-bis[n'-(8-psoralenoxy) alkyl] piperazine (Bis[PsCn]PIP, n = 4, 6, 8), show high water solubility, efficient intercalation into DNA and good photocrosslinking efficiency of DNA. Bis(PsC4)PIP shows high lethality on bacteriophage T7 and can effectively inhibit the amplification of DNA by stopping the polymerase chain reactions in a short period of irradiation time.
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Affiliation(s)
- S K Kim
- Department of Chemistry, School of Molecular Science and Center for Molecular Design and Synthesis, Korea Advanced Institute of Science and Technology, Taejon, South Korea
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Park HO, Sanson A, Herskowitz I. Localization of Bud2p, a GTPase-activating protein necessary for programming cell polarity in yeast to the presumptive bud site. Genes Dev 1999; 13:1912-7. [PMID: 10444589 PMCID: PMC316924 DOI: 10.1101/gad.13.15.1912] [Citation(s) in RCA: 61] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
Yeast cells of different cell type exhibit distinct budding patterns that reflect the organization of the actin cytoskeleton. Bud1p (Rsr1p), a Ras-like GTPase, and Bud2p, a GTPase-activating protein for Bud1p, are essential for proper budding pattern. We show that Bud2p is localized at the presumptive bud site in G(1) cells in all cell types and that this localization is independent of Bud1p. Bud2p subsequently localizes to the mother-bud neck after bud emergence; this localization depends on the integrity of the septins. These observations indicate that Bud2p becomes positioned in G(1) cells by recognizing cell type-specific landmarks at the presumptive bud site.
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Affiliation(s)
- H O Park
- Department of Molecular Genetics, Ohio State University, Columbus, Ohio 43210-1292, USA.
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Park HO, Bi E, Pringle JR, Herskowitz I. Two active states of the Ras-related Bud1/Rsr1 protein bind to different effectors to determine yeast cell polarity. Proc Natl Acad Sci U S A 1997; 94:4463-8. [PMID: 9114012 PMCID: PMC20745 DOI: 10.1073/pnas.94.9.4463] [Citation(s) in RCA: 158] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023] Open
Abstract
Cells of budding yeast organize their cytoskeleton in a highly polarized manner during vegetative growth. Selection of a site for polarization requires a group of proteins including a Ras-like GTPase, Bud1, and its regulators. Another group of proteins, which includes a Rho-like GTPase (Cdc42), its guanine nucleotide exchange factor (Cdc24), and Bem1, is necessary for organization of the actin cytoskeleton and for cell polarization. We have proposed previously that the Bud1 protein, through its GTPase cycle, determines the localization of one or more of the cell polarity proteins to the bud site. Herein we demonstrate that Bud1 directly interacts with Cdc24 and Bem1: Bud1 in its GTP-bound form associates preferentially with Cdc24, whereas the GDP-bound form of Bud1 associates with Bem1. We also present subcellular fractionation data for Bud1 that is consistent with the idea that Bud1 can travel between the site for budding on the plasma membrane and the cytosol. We propose that Bud1 can exist in two active states for association with different partners and that the switch from Bud1-GTP to Bud1-GDP provides a regulatory device for ordered assembly of a macromolecular complex at the bud site.
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Affiliation(s)
- H O Park
- Department of Biochemistry and Biophysics, University of California, San Francisco, CA 94143-0448, USA.
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Peter M, Neiman AM, Park HO, van Lohuizen M, Herskowitz I. Functional analysis of the interaction between the small GTP binding protein Cdc42 and the Ste20 protein kinase in yeast. EMBO J 1996; 15:7046-59. [PMID: 9003780 PMCID: PMC452530] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023] Open
Abstract
STE20 encodes a protein kinase related to mammalian p65Pak which functions in several signal transduction pathways in yeast, including those involved in pseudohyphal and invasive growth, as well as mating. In addition, Ste20 plays an essential role in cells lacking Cla4, a kinase with significant homology to Ste20. It is not clear how the activity of Ste20 is regulated in response to these different signals in vivo, but it has been demonstrated recently that binding of the small GTP binding protein Cdc42 is able to activate Ste20 in vitro. Here we show that Ste20 functionally interacts with Cdc42 in a GTP-dependent manner in vivo: Ste20 mutants that can no longer bind Cdc42 were unable to restore growth of ste20 cla4 mutant cells. They were also defective for pseudohyphal growth and agar invasion, and displayed reduced mating efficiency when mated with themselves. Surprisingly, however, the kinase activity of such Ste20 mutants was normal when assayed in vitro. Furthermore, these alleles were able to fully activate the MAP kinase pathway triggered by mating pheromones in vivo, suggesting that binding of Cdc42 and Ste20 was not required to activate Ste20. Wild-type Ste20 protein was visualized as a crescent at emerging buds during vegetative growth and at shmoo tips in cells arrested with alpha-factor. In contrast, a Ste20 mutant protein unable to bind Cdc42 was found diffusely throughout the cytoplasm, suggesting that Cdc42 is required to localize Ste20 properly in vivo.
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Affiliation(s)
- M Peter
- Department of Biochemistry and Biophysics, University of California, San Francisco 94143-0448, USA
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Herskowitz I, Park HO, Sanders S, Valtz N, Peter M. Programming of cell polarity in budding yeast by endogenous and exogenous signals. Cold Spring Harb Symp Quant Biol 1995; 60:717-27. [PMID: 8824447 DOI: 10.1101/sqb.1995.060.01.078] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Affiliation(s)
- I Herskowitz
- Program in Genetics, School of Medicine, University of California, San Francisco 94143-0448, USA
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Abstract
Cells of the budding yeast Saccharomyces cerevisiae bud at either axial or bipolar sites depending on their cell type. Bud-site selection directs both cell polarity and the cytoskeletal orientation during budding and is determined by at least five genes: BUD1/RSR1, BUD2, BUD3, BUD4 and BUD5. Mutants defective in BUD1, BUD2 or BUD5 choose bud sites randomly. Bud1 protein (Bud1p) has sequence similarity to Ras, a small GTP-binding protein, and Bud5p is similar to Cdc25p (refs 4, 5), a GDP-GTP exchange factor. Here we report that Bud2p is a GTPase-activating protein (GAP) for Bud1p with a sequence similar to the catalytic domain of rasGAPs, and that Bud2p purified from yeast stimulates GTP hydrolysis by Bud1p. Chromosomal deletion of BUD2 causes a random budding pattern but no obvious growth defect. Overexpression of BUD2 also causes a random budding pattern by wild-type cells.
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Affiliation(s)
- H O Park
- Department of Biochemistry & Biophysics, University of California, San Francisco 94143-0448
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Abstract
SSA1, one of the heat-inducible HSP70 genes in the yeast Saccharomyces cerevisiae, displays a significant basal level of expression under optimal growth conditions. Although multiple sites related to the heat shock element (HSE) consensus sequences are present in the SSA1 promoter region, one of these, HSE2, plays a key role in basal expression. An upstream repression site (URS) located adjacent to HSE2 causes repression of basal expression but has little effect on heat-inducible expression of SSA1. A series of DNase I footprinting assays suggests that heat shock factor (HSF) and a URS-binding factor (URSF) can bind simultaneously to the adjacent binding sites HSE2 and URS under optimal growth conditions. URSF in extracts from heat-shocked cells does not bind (or binds very poorly) to the URS adjacent to HSE2. However, URSF in these extracts is able to bind the URS if the URS is separated from HSE2 or if the HSE is mutated such that HSF binding is abolished. These in vitro experiments are consistent with in vivo results showing that the URS is able to repress transcription driven by HSE2 both before and after heat shock if it is separated from HSE2. Our results are consistent with a model of repression in which URSF and HSF bind simultaneously to the adjacent binding sites URS and HSE2 prior to heat shock. After heat shock, however, binding of the two proteins to the adjacent sites is exclusive, perhaps due to modification of HSF known to occur upon heat shock. Because HSF binding predominates, repression by URSF is relieved upon heat shock.
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Affiliation(s)
- H O Park
- Department of Physiological Chemistry, University of Wisconsin-Madison 53706
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Park HO. [Care for children with renal disease]. Taehan Kanho 1991; 30:28-34. [PMID: 2027276] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
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Abstract
The SSA1 gene, one of the heat-inducible HSP70 genes in the yeast Saccharomyces cerevisiae, also displays a basal level of expression during logarithmic growth. Multiple sites related to the heat shock element (HSE) consensus sequence are present in the SSA1 promoter region (Slater and Craig, Mol. Cell. Biol. 7:1906-1916, 1987). One of the HSEs, HSE2, is important in the basal expression of SSA1 as well as in heat-inducible expression. A promoter containing a mutant HSE2 showed a fivefold-lower level of basal expression and altered kinetics of expression after heat shock. A series of deletion and point mutations led to identification of an upstream repression sequence (URS) which overlapped HSE2. A promoter containing a mutation in the URS showed an increased level of basal expression. A URS-binding activity was detected in yeast whole-cell extracts by a gel electrophoresis DNA-binding assay. The results reported in this paper indicate that basal expression of the SSA1 promoter is determined by both positive and negative elements and imply that the positively acting yeast heat shock factor HSF is responsible, at least in part, for the basal level of expression of SSA1.
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Affiliation(s)
- H O Park
- Department of Physiological Chemistry, University of Wisconsin-Madison 53706
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Yoon CM, Kim SB, Park IJ, Bom HS, Rhew JS, Choi SK, Park HO, Yang DH, Jo JK. Clinical features of Crohn's disease in Korea. Gastroenterol Jpn 1988; 23:576-81. [PMID: 3215441 DOI: 10.1007/bf02779492] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
Crohn's disease is a rare disease in Korea, and only 45 cases have been reported during the period of 34 years from 1952 to 1985. The male to female ratio was about 1.3 to 1 with a slight preponderance of males. The age at diagnosis ranged from 8 to 72 (mean 35.5) years, and the peak incidence occurred in the 3rd, 4th and 5th decades and declined thereafter. More than two thirds of the cases had a grossly demonstrable lesion involving the small bowel, including the terminal ileum. The proportion of patients with macroscopic disease continued to the large bowel alone was only 15%. Abdominal pain was common, presenting in 89% of the patients, while such symptoms as fever, hematochezia and diarrhea were not common. Abdominal mass was palpable in more than half the cases, which made it difficult to differentiate Crohn's disease from cancer of the colon, especially in cases with a predominant infiltration of the bowel wall and a secondary ulcer formation. That is one of the reasons why most cases in Korea have been reported by surgeons. A wide variety of complications were present, of which small bowel obstruction was the most common. Other complications were free perforation, malnutrition, fistula formation, hemorrhage and abscess formation, in decreasing order. The incidence of symptomatic perianal disease was only 11%, and this might be due to the small proportion of the disease confined to large bowel. Extraintestinal manifestations were also rare, and only three patients presented symptoms of arthritis. Other systemic features such as liver disease, skin lesion, eye complications were absent.
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Affiliation(s)
- C M Yoon
- Department of Internal Medicine, Chonnam University Medical School, Kwangju, Korea
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20
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Park IC, Kim SB, Yang KH, Choi SK, Park HO, Yoon CM. Clinical features of Crohn's disease in Korea. Korean J Intern Med 1987; 2:152-7. [PMID: 3154827 PMCID: PMC4534937 DOI: 10.3904/kjim.1987.2.2.152] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/04/2023] Open
Abstract
Crohn’s disease is a rare disease in Korea, and only 45 cases have been reported during a 34 year from 1952 to 1985. The male to female ratio was about 1.3 to 1 with a slight preponderance of males. The age at diagnosis ranged from 8 to 72 (mean 35.5) years, and the peak incidence occurred in the 3rd, 4th and 5th decades and declined thereafter. More than two thirds of the cases had a grossly demonstrable lesion involving the small bowel including the terminal ileum. The proportion of the patients with macroscopic disease confined to the large bowel alone was only 15 per cent. Abdominal pain was common presenting in 89 per cent of the patients, while such symptoms as fever, hematochezia and diarrhea were not common. Abdominal mass was palpable in more than half the cases, which made it difficult to differentiate Crohn’s disease from cancer of the colon, especially from the one with a predominant infiltration of the bowel wall and a secondary ulcer formation. That is one of the reasons why most cases in korea have been reported by surgeons. A wide variety of complications were present, of which small bowel obstruction was the most common. Other complications were free perforation, malnutrition, fistula formation, hemorrhage and abscess formation in decreasing order. The incidence of symptomatic perianal diseas was only 11 per cent, and this might be due to the small proportion of the disesase confined to large bowel. Extraintestinal manifestations were also rare, and only three patients presented the symptoms of arthritis. Other systemic features such as liver disease, skin lesions, eye complicaitons were absent.
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Lehmann HU, Park HO. [Prognosis of disease conditions in intensive care in internal medicine]. Lebensversicher Med 1986; 38:172-4. [PMID: 2879200] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
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