• Annals of Occupational and Environmental Medicine
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• 제34권
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• pp.4.1-4.11
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• 2022

Background: Long working hours are known to account for approximately one-third of the total expected work-related diseases, and much interest and research on long working hours have recently been conducted. Additionally, as the prevalence of prediabetes and the high-risk group for diabetes are increasing worldwide, interest in prediabetes is also rising. However, few studies have addressed the development of type 2 diabetes and long working hours in prediabetes. Therefore, the aim of this longitudinal study was to evaluate the relationship between long working hours and the development of diabetes in prediabetes. Methods: We included 14,258 prediabetes participants with hemoglobinA1c (HbA1c) level of 5.7 to 6.4 in the Kangbuk Samsung Cohort Study. According to a self-reported questionnaire, we evaluated weekly working hours, which were categorized into 35-40, 41-52, and > 52 hours. Development of diabetes was defined as an HbA1c level ≥ 6.5%. Hazard ratios (HRs) and 95% confidence intervals (CIs) for the development of diabetes were estimated using Cox proportional hazards analyses with weekly working 35-40 hours as the reference. Results: During a median follow-up of 3.0 years, 776 participants developed diabetes (incidence density, 1.66 per 100 person-years). Multivariable-adjusted HRs of development of diabetes for weekly working > 52 hours compared with working 35-40 hours were 2.00 (95% CI: 1.50-2.67). In subgroup analyses by age (< 40 years old, ≥ 40 years old), sex (men, women), and household income (< 6 million KRW, ≥ 6 million KRW), consistent and significant positive associations were observed in all groups. Conclusions: In our large-scale longitudinal study, long working hours increases the risk of developing diabetes in prediabetes patients.

• Journal of Biosystems Engineering
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• 제20권1호
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• pp.36-46
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• 1995

The number of possible working days is one of the major factors for estimating the coverage area of a combine harvester. The percentages of possible working days at 24 locations were presented by analyzing the amount of rainfall during the working periods of rice harvesting from the end of September to the end of October for past 20 years. The percentages of possible working days ranged from 75% to 85% in most cases.

• 한국환경보건학회지
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• 제19권4호
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• pp.90-102
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• 1993

A study on the factors affecting subjective symptoms of labor working in textile industries was carried out from June I to 30 in 1991. A total of 870 laborers were selected from the textile industries at Taegu, Kyungbuk in Korea. The purpose of this study was to determine the factors affecting subjective symptoms and improve the health condition of the labor in the industries. The results of this study can be summarized as follows: 1. 72.5% of the respondents were females and 27.5% were males. 45% of them were in the age group of between 20 and 29 years old, 25.7% were between 10 and 19 years old and 14.4% were between 30 and 39 years old. 57.6% finished high school level education, 70.6% were single, 31.2% had religion of Buddhism and 57.3% lived in the dormitory. Financially, 45% of them partially supported their family members. 2. 34.5% of the respondants were working in the administrative areas and the rest were working in the production areas. The period of working was 1~4 years. 64.7% of them owned their houses. 72.9% worked for a shift. 15.9% were satisfied with their job and 17.1% were not satisfied with their job. 3. 44.0% of the respondants complained about eye problems and more females than males complained about problems. 4. The laborers in the age group of between 40 and 49 years old complained about serious headache and younger laborers complained about respiratory problems. 5. 50% of unmarried laborers complained about eye problems, 40% of night workers felt aches in their empty stomach. 6. 54.4% of the respondents working in manufacturing department complained about eye problems, 29.5% of working in processing department complained about headache and 43.4% of the respondents working in spinning department complained about shoulder ache. 7. Most laborers went to the drug stores for their health. 8. 60.7% of teen ages complained about their irregular menstruation. 51.7% of the in twenties complained about pain during the period. 45.8% of the respondents in thirties complained about nervous system. The women working nights show 74.1% in all three and highest complaint rate. According to the conclusion of this study, it is recommended that more money should be spent on better health education for the laborers in textile industries. Also it is recommended that the policies and supports for them should be strengthened.

• 한국안전학회지
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• 제30권1호
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• pp.137-143
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• 2015

Fire fighter are exposed to the situations which are hard to predict due to continuous and accidental changes which hinder their fire fighting activity. As these threats of safety accident act as fear factors, they are doing insecure fire fighting activities. Therefore, as unclear and abnormal risks of working environment such as the riskiness of expansion of disaster, instability, obstacles of activities, abnormality, urgency, etc. increase, safety accidents are caused. This study analyzes the actual condition of safety and health and awareness of fire fighter who are exposed safety accidents during their fire fighting activities and utilize such result as the basis data to secure safety of fire fighter, keep efficient safety control and prevent accidents. The results of analysis are as follows. As rescue works among all fire-fighting works shows the highest emotional stabilization and the highest post-traumatic stress disorder is shown in fire sergeant level positions, and fire fighters whose working period is 10-15 years, reinforcing safety training to long-term workers is necessary. As the result of survey regarding safety awareness, the highest awareness level was shown in fire sergeant level positions, and fire fighters whose working period is over 20 years, and when it comes to operation of fire fighting equipments, fire-fighting workers and workers having 1-4 years of working period showed high safety awareness. The more serious injury in a fire fighter experienced as the first injury after working as a fire-fighter, the more cause-and-effect relationship was shown between personal physical condition and work, and it is shown as obstacles of fire fighting activities and affects to post-traumatic stress disorder. Moreover, as after-work off duty activities also affect to official disaster, systematic improvement of working environment is required. Occupational medical work compatibility evaluation considering the distinct characteristics of works to secure fire-fighter' health care together with fire-fighting capability is shown to be necessary.

• 한국사회복지학
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• 제60권4호
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• pp.55-77
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• 2008

본 연구는 근로빈곤층이 빈곤한 주요 원인이 이들이 노동시장에서 겪는 불안정한 경험이라는 점에 주목하여, 이들의 직업력이 어떻게 나타나는지 분석하였다. 이를 위해 사건배열분석과 최적일치법을 활용하여, 근로빈곤층의 직업력을 노동시장 진입 후 일한 기간, 직업 경력에서의 공백의 수와 그 기간, 거쳐 온 직업의 특성을 통해 총체적으로 이해하고자 하였다. 분석결과, 근로빈곤층은 비빈곤층과 비교할 때 일한 기간에서 통계적으로 유의미한 차이를 나타내지 않아 이들이 일을 적게 하기 때문에 빈곤한 것이 아니라는 것을 확인할 수 있었으며, 공백의 수와 기간, 직업의 특성을 통해 살펴본 결과 이들은 비빈곤층에 비해 불안정한 노동경험을 했다는 것을 확인할 수 있었다. 또한 남성과 여성 근로빈곤층 모두는 생애전반에 걸쳐 지속적으로 불안정한 노동경험을 했다는 것을 확인하였다. 이상의 결과를 바탕으로 근로빈곤층을 대상으로 하는 탈빈곤정책에 대해 제언하였다.

• 대한지역사회영양학회지
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• 제24권4호
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• pp.331-342
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• 2019

Objectives: This study examines the intake of food and nutrients of children according to the employment and working hours of their mothers. Methods: The married women in the source data from the 6th National Health and Nutrition Survey were classified into full-time working mothers, part-time working mothers and housewives according to the working type and the data on their children from 3 to 18 years old were analyzed using SAS 9.4. Results: The group from 3 to 5 years old was the smallest group with 682 children (20.2%), followed by the group from 6 to 11 years with 1,345 children (39.8%) and the group from 12 to 18 years old with 1,355 children (40.1%). The lowest rates for having no breakfast and dinner were observed in the group with housewives (p<0.05). The calcium and phosphorous intakes were the highest in the group with housewives at 61.9% and 126.8%, respectively, and the lowest in the group with full-time working mothers at 54.7% and 115.3%, respectively (p<0.05). The group with full-time working mothers had the highest rate in the calcium and iron intake less than the dietary reference intake at 74.9% and 30.0%, respectively. It indicated that the group with full-time working mothers did not have sufficient nutrients as compared to the other two groups. Moreover, the group with the part-time working mothers showed the high vitamin A intake ratio of 41.4% (p<0.05). Conclusions: This study found evidence of a negative association between mother's employment status and children's diet quality. The employment and economic activity of married women will continuously increase in the future. Therefore, a national nutrition policy is required to provide quality nutrition care for children in the households.

• 치위생과학회지
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• 제8권4호
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• pp.337-345
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• 2008

본 연구는 울산지역 일부 치과의료 기관에 근무하는 치과위생사를 대상으로 직무스트레스 파악하여 스트레스 주원인과 관리방안을 모색하기 위한 기초 자료를 제공하고자 조사한바 다음과 같은 결과를 얻었다. 1. 총 168명 중 연령은 25세 이하가 66.1%였으며 결혼상태는 미혼이 87.5%였다. 업무영역에서 진료 담당이 86.9%로 대부분을 차지하였으며 현 직장 근무경력별로는 1~4년 미만이 47.6%로 가장 높았다. 월평균 보수는 100~150만원 미만이 63.7%, 1일 평균 근무 시간은 8시간 이하가 57.1%였으며 주 5일 근무를 실시하는 경우가 58.3%, 야간 진료를 실시하는 경우가 78.0%였다. 2. 치과위생사의 직무스트레스를 분석한 결과 물리환경으로 인한 스트레스는 25세 이하가 26세 이상보다 높았으며(p < 0.05), 월평균 보수가 적을수록(p < 0.05), 하루 평균근무시간이 길수록(p < 0.01) 높았다. 직무요구로 인한 스트레스는 야간 진료를 실시하는 종사자(p < 0.05)와 주5일 근무를 실하는 종사자(p < 0.05)가 높았다. 직무자율로 인한 스트레스는 현 직장 근무경력이 많을수록(p < 0.01), 월평균 보수가 많을수록 높았고(p < 0.01), 직무 불안정에 인한 스트레스는 미혼이 기혼보다 높았다(p < 0.05). 조직체계 스트레스는 하루 평균 근무시간이 많을수록(p < 0.05) 높았고, 직장 문화로 인한 스트레스는 25세 이하가 (p < 0.01), 월평균 보수가 많을수록(p < 0.05), 주 5일 근무를 실시하는 종사자가 높았다(p < 0.05).

• 한국항해학회지
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• 제25권4호
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• pp.347-360
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• 2001

The purpose of this study is to find out the subjective and objective fatigue level and the characteristics of seamen's physical strength with the service period on board, to have a new understanding of the vocation, and to explore a physical exercising program for the seamen. The questionnaire survey for the seamen who had been in service on the ocean going vessels was conducted and the results are fumed out as the followings. Total number of seamen who had answered the questionnaire was 64 persons and the distribution status of service period group was identified as 16 persons for each of 4 groups； the group was classified as the group of less than 5 years, 5 - 10 years, 10 - 15 years, and more than 15 years. 1. Working conditions Working hours in a week was identified as 44－56 hours(45.3%) and the number of 45.3% of the seamen answered the working hours in week is more than 56 hours. The seamen of 25.0% are unsatisfied or very unsatisfied with their vocation. The seamen of 65.6% are smoking, and 45.3% of them drink. The seamen of 44.,3% drink once or more in a week. And the seamen of 67.2% do not take any exercise in a week. 2. Contribution to the seamen's fatigue and subjective symptom The most contributive factor to the seamen's fatigue was identified as the short of sleeping(21.5%), overwork(19.2%), poor working conditions (18.6%), and the friction in human relations also becomes one the contribution to the fatigue(14.0%). The subjective symptom by fatigue was identified as the feeling of languid, sleepy and tiredness of eyes. 3. Characteristics of the seamen's physical strength and Interrelations The grip strength and back strength of the seamen whose service period is less than 5 years were measured as 40.44kg and 127.8kg. The sit ups in the group of service period less than 5 years was measured as 36.84 times, and the vertical jump for the seamen in this group was measured as 46.55cm. The closed-eyes foot balance was measured as 33.64 seconds in the group of service period between 5 and 10 years, and side-step was measured as 35.31 times in the group of service period less than 5 years. The standing trunk flexion was measured as 10.54cm for the seamen whose service period is between 10-15 years, and the trunk extension was measured as 50.70cm for the seamen whose service period is less than 5 years. And the step test of the seamen whose service period is between 10-15 years was measured as 54.44 numbers, and the number of flickers of the seamen whose service period is less than 5 years was measured as 32.94.

• 한국조리학회지
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• 제11권4호
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• pp.14-29
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• 2005

A study was carried out to get information on hotel cooks. We needed to obtain the information on the working environment and satisfaction of the cooks to improve the working environment, a culinary art training program and an efficient man power control program. This study surveyed 305 cooks who work for deluxe hotels in Busan. The results were as fellows: The great part(67.2%) of the cooks was male and less than forty years old (85.6%), 67.0% of the cooks graduated from college and they had over 5 years(33%) or 1${\sim}$3 years(32.0%) in their current work places. 74.8% of the cooks earned less than 1.5 million won in a month. The cooks had on the average 1.53 lieences per person, and the most popular ones were the Western style(55.1%) and Korean style(49.2%) culinary arts. The most work places of the male cooks were Western style(49.3%) and Japanese style(41.8%) restaurants, but those of the female cooks were Western style(49.3%) and Korean style(30.6%) restaurants. The male cooks have worked over 5 years(36.0%) or 1${\sim}$3 years(31.0%) at these work places and the working period of female cooks ranged overall. Job satisfaction was found higher than satisfaction of work places and had no connection with age, job ranks, level of salary and academic background. The higher the age, job ranks, level of salary and academic background were, the more all the cooks satisfied about their jobs and work places.

• 한국안광학회지
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• 제13권4호
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• pp.103-107
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• 2008

목적: 본 연구는 처음 근용 안경을 착용하고자 하는 노안을 대상으로 근용 가입도 검사를 하여 가입도와 나이, 성별, 직업군, 구면 도수, 난시 도수와의 상관관계를 평가하고자 하였다. 방법: 155명의 피검사자의 좌, 우안(310안)을 대상으로 비조절마비 자각적 굴절 검사 및 크로스 실린더를 이용한 근용 가입도 검사를 하였다. 결과: 최초 근용 가입도는 +0.75D에서 +1.75D까지 검사되었고, 43세 이전의 평균 가입도는 +1.06D, 44세~46세까지는 +1.08D, 47세~49세까지는 +1.23D, 50세 이상에서는 +1.46D이었다. 피검사자의 평균 연령은 47.6세, 남자 74명, 여자 81명이었고 근거리 직업군이 71명, 원거리 직업군이 83명이었다. 결론: 가입도는 나이, 직업군, 난시 도수와 높은 상관성을 나타내었다(p<0.05, p<0.05, p<0.05).