Association of Long Working Hours with Marital Status Changes in South Korea

2021 ◽  
Vol Publish Ahead of Print ◽  
Author(s):  
Hyunil Kim ◽  
Woncheol Lee ◽  
Yesung Lee
BMJ Open ◽  
2020 ◽  
Vol 10 (12) ◽  
pp. e041595
Author(s):  
Eunchan Mun ◽  
Woncheol Lee ◽  
Min-Woo Nam ◽  
Hyun-Il Kim ◽  
Hyeongcheol Kim ◽  
...  

ObjectivesAlthough the effects of long working hours on liver function remain unclear, in South Korea, there is a social perception that long working hours are associated with poor liver function. Thus, long working hours have recently become a major issue. This study aimed to determine the association between long working hours and liver function, as indicated by the alanine transaminase (ALT) levels.DesignCross-sectional study.SettingLarge university hospitals in Seoul and Suwon, South Korea.ParticipantsWorkers in formal employment who underwent a comprehensive health examination at the Kangbuk Samsung Hospital Total Healthcare Centre clinics in Seoul and Suwon, South Korea, between January 2011 and December 2018. Of the 386 488 participants, 212 421 met the inclusion criteria and were included in the analysis.Primary outcome measureALT elevation.ResultsThe participants were predominantly well-educated (86.1%), male (69.3%) and in their 30s (49.6%). In total, 13.4% of the participants presented ALT elevation (>40 IU/L). There was no significant association between working hours and ALT elevation in the general population and in the hepatitis B surface antigen (HBsAg)-negative group. Conversely, in the HBsAg-positive group, working >60 hours per week compared with 35–40 hours per week was significantly associated with ALT elevation. The association was more pronounced in those with ALT levels >80 IU/L (OR 1.94, 95% CI 1.24 to 3.01) than in those with ALT levels >40 IU/L (OR: 1.45, 95% CI 1.20 to 1.75). The p values for trend were <0.05.ConclusionsLong working hours were associated with ALT elevation only in hepatitis B virus carriers and not in the general population. Provided that there is adherence to the legal working hours, there is no need to further restrict working hours for liver health, irrespective of HBsAg status.


BMJ Open ◽  
2021 ◽  
Vol 11 (9) ◽  
pp. e050037
Author(s):  
Eunchan Mun ◽  
Yesung Lee ◽  
Woncheol Lee ◽  
Soyoung Park

ObjectivesThis study aimed to determine the cross-sectional association between long working hours and gastritis diagnosed by endoscopy.DesignCross-sectional study.SettingLarge university hospitals in Seoul and Suwon, South Korea.ParticipantsWorkers in formal employment who underwent a comprehensive health examination at the Kangbuk Samsung Hospital Total Healthcare Centre clinics in Seoul and Suwon, South Korea, between January 2011 and December 2018. Of the 386 488 participants, 168 391 full-time day workers met the inclusion criteria and were included in the analysis.Primary outcome measureEndoscopic gastritis.ResultsThe participants were predominantly college graduates or above (88.9%), male (71.2%) and in their 30s (51.1%), and the median age was 36 (IQR 31–42). Approximately 93.2% of participants had positive endoscopic gastritis, and there was a significant association between working hours and positive findings of endoscopic gastritis. The multivariate fully adjusted prevalence ratio (PR) of endoscopic gastritis for participants working >55 hours per week compared with 35–40 hours per week was 1.011 (95% CI 1.007 to 1.015). Furthermore, endoscopic findings were classified into nine subtypes of gastritis, including superficial gastritis, erosive gastritis, atrophic gastritis, intestinal metaplasia and haemorrhagic gastritis increased with longer working hours (p for trends <0.05). Their PRs for participants working >55 hours per week compared with 35–40 hours per week were 1.019 (95% CI 1.012 to 1.026), 1.025 (95% CI 1.011 to 1.040), 1.017 (95% CI 1.008 to 1.027), 1.066 (95% CI 1.028 to 1.105) and 1.177 (95% CI 1.007 to 1.375), respectively.ConclusionsWorking over 55 hours per week was cross-sectionally associated with positive findings of endoscopic gastritis. The study findings indicated potentially increased risks of superficial gastritis, erosive gastritis, atrophic gastritis, intestinal metaplasia and haemorrhagic gastritis among workers with long working hours (>55 hours per week), supporting the need for further exploration via longitudinal studies.


2020 ◽  
Author(s):  
Muchtaruddin Mansyur ◽  
Risna Sagitasari ◽  
Grace Wangge ◽  
Astrid Sulistomo ◽  
Aria Kekalih

Abstract Background Tugboat crews are susceptible to fatigue their 24-hour stay in the working environment even in their rest time. The fatigue experienced by the seafarers contributes to marine accidents and metabolic and cardiovascular diseases which are long-term effects. This study aimed to analyze the association between working hours and fatigue, along with other possible related factors in tugboat crews. Method: This comparative cross-sectional study included 127 tugboat crew members from a randomly chosen tugboat in Samarinda Harbor, Indonesia. Their fatigue levels at work were subjectively measured using the reaction timer and standardized instrument questionnaire. Data on the crews' personal and occupational factors included age, marital status, rating (job position), duration on board, length of seafaring experience, watch system, smoking habit, coffee and alcohol consumption, and working hours. Moreover, sleep quality and levels of stress-related to the family conflict were measured and analyzed using the Pittsburgh Sleep Quality Index (PSQI) and Work-Family Conflict Scale (WCFS), respectively. Results It was found that 40.2% of the subjects experienced fatigue due to long working hours (≥ 72 hours/week), poor sleep quality, and being non-officer crews, with adj. OR and 95%CI values of (12.76; 3.91–41.70), (5.84; 1.67–20.47), and (4.38; 1.28–14.92), respectively. However, the variables of crews' characteristics and occupational factors included age, marital status, duration on board, length of seafaring experience, smoking habit, coffee and alcohol consumption were not statistically associated with the crews' fatigue. Conclusion The incidence of fatigue among Indonesian tugboat crews is considerably high. Working hours, sleep quality, and job rating were strongly associated with fatigue in tugboat crews. Working hours monitoring of tugboats crews needs to be improved.


2020 ◽  
Author(s):  
Hyunil Kim ◽  
Woncheol Lee ◽  
Soyoung Park ◽  
Hyeongcheol Kim

Abstract Background: This study investigated the association between parental long working hours and the depression of adult children living with them in South Korea. Methods: Data from two years of the Korean National Health and Nutrition Examination Survey (KNHANES) in 2014 and 2016 were analyzed using a cross-sectional study. Study samples included 1334 adult children aged ≥ 19 and 2486 parents (1483 mothers and 1003 fathers). Depression was assessed using the Patient Health Questionnaire-9 (PHQ-9). Logistic regression analyses were performed to determine the association between parental long working hours and their adult children’s depression. Results: Odds ratio (OR) of adult children’s depression for maternal working > 60 hours/week was 4.88 (95% confidential interval (CI): 1.95 – 12.2) when maternal working ≤ 40 hours/week was considered as a reference in the crude model. After considering parental and adult children’s socio-demographic characteristics and occupational characteristics, and parental depression, OR of adult children’s depression for maternal working was found to be 10.2 (95% CI: 2.47 – 42.0). The association between paternal long working hours and adult children’s depression was not statistically significant. Conclusions: Mothers’ long working hours were associated with the greater risk of their adult children’s depression in South Korea. Comprehending aging mothers’ weekly working hours is an important factor when developing strategies for addressing adult children’s depression using family-based interventions.


Author(s):  
Hyunil Kim ◽  
Byung-Seong Suh ◽  
Won-Cheol Lee ◽  
Han-Seur Jeong ◽  
Kyung-Hun Son ◽  
...  

BMJ ◽  
2015 ◽  
Vol 350 (jan12 13) ◽  
pp. g7772-g7772 ◽  
Author(s):  
M. Virtanen ◽  
M. Jokela ◽  
S. T. Nyberg ◽  
I. E. H. Madsen ◽  
T. Lallukka ◽  
...  

Author(s):  
Hye-Eun Lee ◽  
Nam-Hee Kim ◽  
Tae-Won Jang ◽  
Ichiro Kawachi

This study investigates whether workers with long working hours as well as shift workers perceive higher unmet dental care needs, and whether there is a gender difference in the associations. We used the Korea Health Panel (2009, 2011–2014) involving 20,451 person-wave observations from 5567 individuals. Perceived unmet dental care needs was defined when the participants reported that they perceived a need for dental treatment or check-up but had failed to receive dental care services during the past year. Fixed effects logit models were applied to examine how changes in weekly working hours or shift work status were linked to changes in perceived unmet dental needs within each individual. Among participants, 15.9–24.7% reported perceived unmet dental needs and the most common reason was time scarcity. We found that long working hours (>52 h/week) was significantly associated with perceived unmet dental needs due to time scarcity in both men (OR = 1.42, 95% CI 1.13–1.78) and women (OR = 1.35, 95% CI 1.03–1.79) compared workers working 40–52 h per week. Shift work was also a significant risk factor, but only in women (OR = 1.57, 95% CI 1.06–2.32). These findings provide evidence for labor policies to reduce working hours in order to improve access to dental care services.


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