• 제목/요약/키워드: shift-workers

검색결과 313건 처리시간 0.027초

소변 중 디아민을 이용한 디이소시아네이트 노출 근로자의 생물학적 모니터링 (Biological Monitoring of Workers Exposed to Diisocyanates using Urinary Diamines)

  • 이종성;김부욱;신정아;백진이;신재훈;김지혜
    • 한국산업보건학회지
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    • 제26권2호
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    • pp.178-187
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    • 2016
  • Objectives: Diisocyanates are a potent inducer of diseases of the airways, especially asthma. In this study, toluenediamine(TDA) and methylenedianiline(MDA) in urine were evaluated as biomarkers of exposure to tolunenediisocyanate(TDI) and methylenediphenyl diisocyanate(MDI), respectively. Methods: Workers exposed to TDI and MDI, as well as non-occupationally exposed subjects, were studied and pre- and post-shift urine samples were collected from 8 control subjects and 8 workers from a factory which manufactures polyurethane products for reducing noise and vibration in automobiles. Airborne TDI and MDI(n=8) were sampled on solvent-free glass filters impregnated with n-butylamine and detected by liquid chromatography atmospheric pressure ionization tandem mass spectrometry. Urinary TDA and MDA were detected as pentafluoropropionic acid anhydride(PFPA) derivatives by liquid chromatography electrospray ionization tandem mass spectrometry. Results: The median levels of urinary 2,6-TDA(p<0.001), 2,4-TDA(p=0.001), and MDA(p<0.001) of workers in post-shift samples were significantly higher than those of controls. The median levels of urinary 2,6-0TDA($0.63{\mu}g/g$ creatinine vs $0.34{\mu}g/g$ creatinine, p=0.017) and MDA($4.21{\mu}g/g$ creatinine vs $3.18{\mu}g/g$ creatinine, p=0.017) of workers in post-shift samples were significantly higher than those of the pre-shift samples. There were significant correlations between the urinary 2,6-TDA, 2,4-TDA, and MDA of workers in post-shift samples and the airborne 2,6-TDI(rho=0.952, p<0.001), 2,4-TDI(rho=0.833, p=0.001), and MDI(rho=0.952, p<0.001). Conclusions: These urinary diamines, metabolites of diisocyanates, in post-shift samples were useful biomarkers to assess occupational exposure to diisocyanates.

The relationship between shift work pattern and thyroid stimulating hormone in female workers

  • Hun Jeong;Chang Ho Chae;Jun Ho Lee;Hyo Won Chong
    • Annals of Occupational and Environmental Medicine
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    • 제35권
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    • pp.14.1-14.10
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    • 2023
  • Background: Shift work is known to cause changes in the circadian rhythm of the human body and adversely affect not only physical health but also mental health. Some studies have demonstrated the correlation between shift work and thyroid stimulating hormone (TSH), a hormone that changes according to the diurnal rhythm, but few studies have reported the different TSH levels according to the shift work type. This study aimed to investigate changes in TSH according to the shift work type. Methods: This study included 1,318 female workers who had a medical checkup at a university hospital in Changwon from 2015 to 2019. Shift work types were classified as non-shift work, regular 2 shifts, and irregular three shifts, and a TSH ≥ 4.2 mIU/L was defined as abnormal. A general linear model (GLM) was used to compare the TSH levels and the risk of subclinical hypothyroidism in each year, and a binary logistic analysis was performed using a generalized estimation equation (GEE) to compare the risk of subclinical hypothyroidism over the 5-year period. Results: Of the 1,318 participants included in this study, 363, 711, and 244 were non-shift, two-shift, and irregular three-shift workers, respectively. In the GEE analysis, after adjusting for age, body mass index, smoking, and alcohol consumption, the odds ratios (ORs) were 1.81 (95% confidence interval [CI]: 1.15-2.86; p = 0.011) in 2 shifts and 2.02 (95% CI: 1.23-3.32; p = 0.006) in irregular three shifts, compared to non-shift. Conclusions: Our results showed that shift work had a higher risk of subclinical hypothyroidism than non-shift work and that there was a significant difference in the risk of subclinical hypothyroidism according to the shift work type. These findings suggest that the shift work type can be considered in future thyroid function tests and evaluations.

교대근무자의 카페인 섭취가 수면의 질에 미치는 영향 (Effect of Ingested Caffeine on the Sleep Quality among Shift Workers)

  • 김혜성;이종은
    • 한국직업건강간호학회지
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    • 제29권4호
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    • pp.306-315
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    • 2020
  • Purpose: This study was conducted to identify the effects of caffeine intake by shift workers on sleep, considering various variable related to the sleep health of shift workers. Methods: A descriptive survey study was conducted with 128 employees who worked shifts. Respondents were surveyed on their of caffeine intake behavior, schedule type, quality of sleep, health promotion behavior, and occupational stress. Differences in their quality of sleep were assessed using the t-test and analysis of variance, while factors influencing the effect of caffeine intake on the quality of sleep were analyzed using hierarchical logistic regression. Results: The average Pittsburgh Sleep Index, Korean Version score of those surveyed was 7.3±3.25, indicating that their quality of sleep was low. On the other hand, their aveage daily intake of caffeine was 1.6±0.99 cups (1 cup =150 mL) and 116.4±77.58 mg/dL of caffeine. When the various variables that could have affected the quality of sleep were corrected, an increase in the amount of caffeine consumed was found to lead to a decrease in the quality of sleep (p=.015). Conclusion: Caffeine intake by shift workers has a significant bearing on their quality of sleep; therefore, such intake should be adjusted to improve their sleep health.

Self-Reported Recovery from 2-Week 12-Hour Shift Work Schedules: A 14-Day Follow-Up

  • Merkus, Suzanne L.;Holte, Kari Anne;Huysmans, Maaike A.;van de Ven, Peter M.;van Mechelen, Willem;van der Beek, Allard J.
    • Safety and Health at Work
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    • 제6권3호
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    • pp.240-248
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    • 2015
  • Background: Recovery from fatigue is important in maintaining night workers' health. This study compared the course of self-reported recovery after 2-week 12-hour schedules consisting of either night shifts or swing shifts (i.e., 7 night shifts followed by 7 day shifts) to such schedules consisting of only day work. Methods: Sixty-one male offshore employees-20 night workers, 16 swing shift workers, and 25 day workers-rated six questions on fatigue (sleep quality, feeling rested, physical and mental fatigue, and energy levels; scale 1-11) for 14 days after an offshore tour. After the two night-work schedules, differences on the $1^{st}$ day (main effects) and differences during the follow-up (interaction effects) were compared to day work with generalized estimating equations analysis. Results: After adjustment for confounders, significant main effects were found for sleep quality for night workers (1.41, 95% confidence interval 1.05-1.89) and swing shift workers (1.42, 95% confidence interval 1.03-1.94) when compared to day workers; their interaction terms were not statistically significant. For the remaining fatigue outcomes, no statistically significant main or interaction effects were found. Conclusion: After 2-week 12-hour night and swing shifts, only the course for sleep quality differed from that of day work. Sleep quality was poorer for night and swing shift workers on the $1^{st}$ day off and remained poorer for the 14-day follow-up. This showed that while working at night had no effect on feeling rested, tiredness, and energy levels, it had a relatively long-lasting effect on sleep quality.

일개 제조업 남성근로자에서 신체활동과 우울증상과의 관련성 (Association between Physical activity and Depressive Symptoms among Korean Male Workers)

  • 채창호;박철용;손준석
    • 한국산업보건학회지
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    • 제27권3호
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    • pp.201-209
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    • 2017
  • Objectives: This study was conducted to assess the association between level of physical activity and depressive symptoms among Korean male workers. Methods: A self-administered questionnaire was distributed and anthropometric measurements were conducted with 1,379 male workers during a general health check. From this data, we identified the general characteristics, levels of physical activity(IPAQ), and depressive symptoms(CES-D) of the study population. We conducted univariate logistic regression to verify the variables that affect depressive symptoms and multivariate logistic regression to calculate odds ratios. Results: Among the 1,379 male workers, 43.4% were in the insufficiently active group(IPAQ category 1) and 22.8% were in the depressive symptom group($CES-D{\geq}16$). The odds ratio(OR) for depressive symptoms was statistically higher in the insufficiently active group, workers aged over 30, the shift work group, and the unmarried group. Adjusted for those variables, the ORs for depressive symptoms were found to be 1.45(95% CI=1.25-2.11), 1.15(OR=1.15, 95% CI=1.08-1.99) and 1.75(95% CI=1.48-2.02), for the insufficiently active group, workers aged over 30, and the shift work group, respectively. Conclusions: We found physical inactivity, age, marital status, and shift work to be associated with depressive symptoms among male workers. This study supports the suggestion that physical activity can be helpful to reduce depressive symptoms among workers.

액티그래프를 이용한 항공관제사의 수면/각성행동 (Sleep-wake Behavior of Air Traffic Controllers using Wrist Actigraph)

  • 서유진
    • 대한인간공학회지
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    • 제29권3호
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    • pp.337-345
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    • 2010
  • The purpose of this study was to investigate the effects of sleep/wake behavior for shiftwork in air traffic controllers (ATCs) using wrist actigraph for ten workers on a continuous full-day three-team three-shift system of forward rotation including on-duty and off-duty periods. The wrist actigraph data were recorded for three days (one shift cycle) for each subject. The mean activity counts during an on-duty period progressively increased from the night, the swing, to the morning shifts. The doze length during on-duty periods showed decreases in the morning and swing shifts as compared to the night shift. Total sleep time (TST) and sleep efficiency (SE) during off-duty periods increased in the morning-1 and swing-night shift compared to the morning-2 shift. Finally, I discussed the role of doze-taking during the burden on night shift ATCs.

직업적으로 스티렌에 노출된 근로자의 뇨중 대사산물에 관한 연구 (A study on the urinary metabolites of styrene exposed workers)

  • 오세욱;원정일
    • 환경위생공학
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    • 제11권3호
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    • pp.1-7
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    • 1996
  • Mandelic acid is the major metabolite and phenylglyoxylic acid is the minor metabolite of styrene in human. This study was conducted to investigate the correlation between exposure concentrations of styrene and concentration of the metabolites in urine The concentrations of metabolites in urine and exposure concentrations were measured in 60 workers who were occupationally exposed to styrene in FRP industry as well as paint industry and musical instrument manufacturing industry and the concentrations of metabolites in urine ware measured in 90 workers not occupationally exposed to styrene for review the background level in the unexposed population. The results obtained were as follows; 1. The mean exposure concentration is 16.6 $\pm $12.2 ppm (range 0.4-49.9ppm) in the styrene exposed workers. 2. The concentration of mandelic acid in urine collected at the end of shift from worker exposed 8 hours to 50ppm of styrene, based on extrapolation from correlation equations was 578.5 mg/g creatinine and 176.8 mg/g creatinine for next morning urine, the concentration of phenylglyoxylic acid in urine collected at the end of shift was 291.1 mg/g creatinine, 177.9 mg/g creatinine in next morning urine. In the sum of mandelic acid and phenylglyoxylic acid in the urine 870.2 mg/g creatinine in urine sampled at the end of shift corresponds to an exposure of 50ppm of styrene and 366.0 mg/g creatinine for next morning sample corresponds to 50ppm. 3. The correlation of the degree of exposed with sum concentration of mandeliacid and phenylglyoxylic acid in the urine was better(r=0.079 for end of shift, r=0.78 for next morning) than the correlation with single determinant measurement in urine(r=0.75 for mandelic acid at end of shift, r=0.73 for mandelic acid at next morning, r=0.69 for phenylglyoxylic acid at end of shift, r=0.62 for phenylglyoxylic acid at next morning). The monitoring of sum concentration of mandelic acid and phenylglyoxylic acid in urine is a valuable indicator of time weighted average daily exposure ti styrene. And the exposure standard of urinary metabolites produced by styrene should be set, in distinction urine at the end of shift from urine at next morning.

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광주지역 제조업 근로자의 근무형태가 식습관에 미치는 영향 (Effect of working patterns on eating habits in manufacturing workers of Gwangju area)

  • 임지숙;허영란;정은;이재준
    • Journal of Nutrition and Health
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    • 제49권6호
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    • pp.495-505
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    • 2016
  • 본 연구는 산업체에 근무하는 직장인의 근무형태별 특성을 살펴보고 그에 따라 식습관에는 어떠한 상관관계가 있는지 알아보고자 광주광역시 광산구에 소재한 K 제조 공장에 재직 중인 근로자를 대상으로 식습관과 직무스트레스에 관한 설문조사를 실시하고, 이를 토대로 하여 근무형태에 따른 식습관 특성을 살펴보았다. 연구대상자의 나이는 40~49세 및 50세 이상이 가장 많았으며 근무기간은 근무형태와 상관없이 대부분 10년 이상의 경력에 하루 평균 8~10시간을 근무하였다. 단순분석에서 통계적으로 유의한 차이를 보인 연령, 근무기간, 평균근무시간, 교육수준, 가족월 평균수입, 주관적 건강인식, 중등도 신체활동여부, 음주량, 흡연량, 수면시간, 이상지질혈증 처음진단시기를 보정하여 조사대상자들의 식습관, 카페인 섭취량, 직무스트레스 정도를 분석한 결과 평소의 식사량에 대해 비교대근무 근로자가 $1.4{\pm}0.9$, 교대근무 근로자가 $1.1{\pm}0.5$로 나타나 유의한 차이를 보였고 (p < 0.001), 균형 잡힌 식사 정도는 비교대근무 근로자가 $1.5{\pm}0.6$, 교대근무 근로자 $1.3{\pm}0.4$로 유의한 차이가 나타났다 (p = 0.005). '채소 섭취'는 비교대근무 근로자가 $1.9{\pm}0.7$, 교대 근무 근로자 $1.7{\pm}0.5$로 유의한 차이를 보였고 (p = 0.024), '해조류 섭취' 역시 비교대근무 근로자자 $1.7{\pm}0.6$, 교대근무 근로자 $1.5{\pm}0.4$로 교대근무자에 비하여 유의하게 높았다 (p = 0.049). 반면 '1일 3끼의 식사 중 거르는 일이 있습니까'는 비교대근무에서 $2.1{\pm}0.8$ 교대근무에서 $2.5{\pm}0.5$로 식습관 조사 항목 중 유일하게 교대근무 근로자에서 유의하게 높았다 (p = 0.001). 또한 근무형태별 식습관 점수 합계는 비교대근무 $16.1{\pm}0.6$, 교대근무 $14.0{\pm}0.3$으로 비교대근무 근로자가 유의하게 높았다 (p = 0.035). 직무요구도에서 받는 직무스트레스 정도는 비교대근무에서 $46.2{\pm}2.6$, 교대근무에서 $34.0{\pm}1.4$로 비교대근무에서 유의하게 높게 나타났으며 (p = 0.001), 직무 자율성 결여는 교대 근무 근로자가 $50.7{\pm}1.0$, 비교대근무 근로자가 $44.2{\pm}1.0$으로 교대근무 근로자가 유의하게 높았다 (p < 0.001). 조직적 관리체계에 대한 직무 스트레스는 교대근무 $57.0{\pm}1.2$, 비교대근무 $50.9{\pm}2.0$로 교대근무 근로자에서 유의하게 높았다 (p = 0.036). 연구대상자들의 직무스트레스 정도에 따른 제요인 분석은 스트레스 정도의 총합으로부터 정도에 따라 백분위수로 구분하여 분석하였다. 직무스트레스를 가장 적게 받는 근무형태는 교대근무 근로자로 28.1%를 나타냈고, 직무스트레스를 가장 많이 받는 근무형태는 교대근무 근로자에 비해 비교대근무 근로자가 39.7%로 나타나 유의하게 높았다 (p < 0.001). 이상의 결과를 종합하여 보면 교대근무 근로자는 중등도 신체활동과 음주량 및 흡연자가 비교대근무 근로자에 비해 높았으며, 식습관도 좋지 않았다. 사무직을 포함하는 비교대근무 근로자는 교대근무 근로자들에 비해 신체활동이 적고, 직무스트레스를 더 많이 받으며, 식습관은 다소 높게 나타났으나, 전반적인 식습관 평가 점수는 비교대근무 근로자와 차이가 없는 것으로 나타났다. 이러한 결과에도 불구하고 본 연구의 제한점 및 제언은 다음과 같다. 설문조사가 재직근로자의 일부에 국한되었고, 대상자들의 설문결과 근무형태와 무관하게 전반적으로 이상지질혈증 유병률이 높게 나타났으며, 사무직과 생산직 근로자를 포함한 비교대 근로자가 생산직 교대 근무자들에 비해 식행동이 바람직하지 못하고, 직무스트레스를 더 많이 받는 것으로 나타났으나, 본 연구가 단면연구로서 서로의 인과관계를 유추하기에는 한계가 있었다. 따라서 후속연구로는 사무직과 생산직에 근무하는 비교대 근로자 간에, 혹은 생산직에만 근무하는 비교대 근로자와 교대근로자 간의 식습관과 직무스트레스 차이를 비교하는 세분화된 연구가 필요할 것이다.

교대근로자의 심리적 안녕감, 피로 및 자기효능감이 건강증진행위에 미치는 영향 (The Effect of Well-being, Fatigue, and Self-efficacy on Health Promotion Behaviors among Shift Workers)

  • 박진웅;권명진
    • 한국직업건강간호학회지
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    • 제28권4호
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    • pp.293-299
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    • 2019
  • Purpose: This study aimed to identify the factors that affect the health promotion behaviors of shift workers. Methods: Using self-administered questionnaires, data were collected between August 13th and 31st, 2018. Descriptive statistics were computed, and t-test, analysis of variance, and correlational and multiple stepwise regression analyses were conducted using International Business Machines Corporation (IBM) Statistical Package for the Social Sciences (SPSS) version 22. Results: Health promotion behaviors were significantly and positively correlated with psychological well-being (r=.491, p<.001), fatigue (r=.170, p=.030), and self-efficacy (r=.520, p<.001). Psychological well-being (${\beta}=.249$, p=.014), fatigue (${\beta}=.179$, p=.007), and self-efficacy (${\beta}=.335$, p=.001) had significant effects on health promotion behaviors and together explained 31.7% of the variance. Conclusion: A systematic educational program that enhances psychological well-being should be developed and implemented to nurture health promotion behaviors among shift workers. Additionally, an intervention program that can enhance health promotion behaviors should be implemented to improve self-efficacy and prevent fatigue among shift workers.

Impact of Reduced Working Hours and Night Work Hours on Metabolic Syndrome: A Quasi-Experimental Study

  • Hye-Eun Lee;Ichiro Kawachi
    • Safety and Health at Work
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    • 제14권1호
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    • pp.59-65
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    • 2023
  • Objectives: Epidemiological evidence linking long working hours and shift work to metabolic syndrome remains inadequate. We sought to evaluate the impact of reducing working hours on metabolic syndrome. Methods: We compared the prevalence of metabolic syndrome among male manual workers in a manufacturing company (N = 371) before and after the introduction of policy to reduce daily work hours from 10 to 8 hours. Components of metabolic syndrome were measured in periodic health examinations before the intervention, 6-9 months after, and 1.5-2 years after the intervention. Generalized estimating equation models were used to estimate changes in the prevalence of metabolic syndrome. Analyses were stratified by day work versus shift work. Results: The results showed a significantly decreased prevalence of metabolic syndrome 6-9 months following the intervention in day workers (risk ratio = 0.68, 95% confidence interval 0.52-0.88), but the benefit disappeared after 1.5-2 years. Shift workers showed a decreased prevalence of metabolic syndrome for the whole follow-up duration after the intervention, although the change was not statistically significant. Conclusion: Reducing working hours was associated with short-term improvement in metabolic syndrome in male manual workers.