• Industrial Engineering and Management Systems
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• 제6권1호
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• pp.22-27
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• 2007

This paper describes the optimization of maintenance workforce scheduling at Afam power station in Nigeria. The objective is to determine the optimum schedule to satisfy growing maintenance labour requirements with minimum cost and highest efficiency. Three alternative maintenance workforce schedules are compared. The first alternative is to continue with the traditional five-day workweek schedule currently being practiced by Afam power station maintenance line. The second alternative is to switch to a seven-day workweek schedule for the morning shift only. The third alternative is to use a seven-day workweek schedule for all three work shifts. The third alternative is chosen, as it is expected to save 11% of the maintenance labour cost.

• Annals of Occupational and Environmental Medicine
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• 제35권
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• pp.46.1-46.12
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• 2023

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.

• 대한간호학회지
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• 제50권4호
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• pp.631-640
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• 2020

Purpose: This study aimed to examine premenstrual symptoms (PMS) of shift nurses and identify the association between PMS, sleep, and occupational stress. Methods: This study was conducted with a secondary data analysis that used data from the Shift Work Nurse's Health and Turnover study. The participants were 258 nurses who were working in shifts including night shifts. PMS, sleep patterns (sleep time and sleep time variability), sleep quality, and the occupational stress of each participant were measured using the Moos Menstrual Distress Questionnaire, a sleep diary, an actigraph, the Insomnia Severity Index, and the Korean Occupational Stress Scale, respectively. Data were analyzed using SPSS 23 and STATA 15.1 to obtain descriptive statistics, Pearson's correlation coefficients, multiple linear regression with generalized estimating equations (GEE) and Baron and Kenny's mediating analysis. Results: The average PMS score, average sleep time, average sleep time variability, average sleep quality score, and average occupational stress score of the participants was 53.95 ± 40.45, 7.52 ± 0.89 hours, 32.84 ± 8.43%, 12.34 ± 5.95, and 49.89 ± 8.98, respectively. A multiple linear regression analysis with GEE indicated that sleep time variability (B = 0.86, p = .001), and sleep quality (B = 2.36, p < .001) had negative effects on nurses' PMS. We also found that sleep quality had a complete mediating effect in the relationship between occupational stress and PMS. Conclusion: These findings indicate that both sleep time variability and sleep quality are important factors associated with PMS among shift work nurses. To improve shift nurses' PMS status, strategies are urgently needed to decrease sleep time variability and increase sleep quality.

• Safety and Health at Work
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• 제12권3호
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• pp.390-395
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• 2021

Background: Health-care providers typically undergo shift work and are subjected to increased stress. Night shift work may induce disturbed sleep cycles and circadian rhythm. The objective of this study was to explore if night shift workers (NSWs) show an increased risk of abnormal thyroid-stimulating hormone (TSH). Methods: We conducted a retrospective cohort study of 574 employees without thyroid disease and abnormal TSH at baseline who underwent annual check-ups between 2007 and 2016 in a medical center. NSWs were defined as those with working time schedules other than daytime hours. We calculated the incidence rate and estimated the adjusted hazard ratio (HR) for incident abnormal TSH and subclinical hypothyroidism compared with non-NSWs using a Cox regression model. Results: A total of 56 incident abnormal TSH cases and 39 subclinical hypothyroidism cases in NSWs were identified during 3000 person-years of follow-up. In models adjusted for age, sex, obesity, and working departments, we found no increased relative risk for incident abnormal TSH (HR: 0.72, 95% confidence interval: 0.33-1.60) or subclinical hypothyroidism (HR: 0.52, 95% confidence interval: 0.19-1.45) when comparing NSWs to non-NSWs; nor were incidence rates significantly different among exclusively medical employees after excluding administrative staff. Conclusion: In this hospital-based nine-year follow-up retrospective cohort study, NSWs were not associated with increased relative risk of incident abnormal TSH and subclinical hypothyroidism, in contrast to previous cross-sectional studies.

• 한국융합학회논문지
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• 제12권7호
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• pp.295-304
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• 2021

본 연구는 일반병동에 근무하는 교대근무 간호사의 간호업무 수행실태와 직무만족도를 확인하기 위한 2차 자료 분석 연구이다. 연구 결과, 전체 간호 업무 중 대상자가 수행한 직접간호는 45%, 간접간호는 55%를 차지하였다. 교대 근무별로 주간에 수행한 업무량은 전체 업무량의 37.2%였고 인계 후 수행한 업무는 '직접간호(34.5%)'와 '기록과 보고(25.8%)'였다. 대상자들은 본인이 수행한 업무 중 일부분에 대해 간호보조 인력에게 위임 가능하거나, 타 의료인과 경계가 모호한 업무가 있다고 응답하였다. 야간근무의 직무이행도와 직무만족도 간의 유의한 상관관계(rs=.43, p=.01)가있었다. 이러한 결과는 교대근무별 직무분석에 근거한 업무효율성 제고 및 EMR적용, 스마트 기기 등을 활용한 인계시간 감소 전략, 업무 수행주체를 명확히 하는 방안이 필요함을 시사한다.

• 여성건강간호학회지
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• 제24권3호
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• pp.252-264
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• 2018

Purpose: To understand the essentials of rearing conflict experience by three shift nurses in advanced general hospitals. Methods: The design was a qualitative research of phenomenology. Participants were 7 shift nurses working in advanced general hospitals who were rearing young children. Data were collected individually through in-depth interview on their life experiences. Data were analyzed by Colaizzi's phenomenological methodology. Results: Eighteen themes were drawn from 256 meaningful experiences and these themes were integrated to six theme clusters. The most influencing themes were 'Regret that I cannot satisfy even the slightest wish', 'Fail to care for kids', and 'Mutual feeling to care giver between appreciation and inconvenience'. Other themes were as follows: 'Body and mind are broken', 'The need for a three-shift system to support nurses who are rearing children', 'Doing my best for work and child rearing'. Conclusion: The nature of three-shift nurses working in advanced hospital and caring kids is explained as 'lives with conflict' between work and home. This study suggests it is necessary to establish a 24-hour care center for 3-shift nurses to keep working while rearing their children.

• 여성건강간호학회지
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• 제27권2호
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• pp.113-127
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• 2021

Purpose: This study examined health behaviors, use of health services, and depression among women who perform daytime and shift work in Korea, as well as factors related to depression. Methods: We conducted a secondary analysis using data from the 2018 data of the 7th Korea National Health and Nutrition Examination Survey. Data on women, 1,493 regular daytime workers and 322 shift workers, were analyzed. Results: Women shift workers (χ²=43.97, p<.001), had a lower education level (χ²=45.56, p<.001), and lower personal income (χ²=16.85, p=.030) than their daytime counterparts. A higher proportion of shift workers were unmarried (χ²=37.47, p<.001) and they typically worked fewer than 40 hours per week (χ²=69.94, p<.001). The depression score of shift workers was higher than that of daytime workers (t=2.85, p=.005). A higher proportion of shift workers also drank alcohol (χ²=6.49, p=.032) and smoked (χ²=30.79, p<.001). Over 8% of shift workers typically slept fewer than 5 hours per night (χ²=14.17, p=.024). It was confirmed that depression in women shift workers was affected by age, personal income, marital status, health status, and smoking status, in addition to cancer screening participation, unmet medical care needs, and unmet dental care needs. Conclusion: More attention should be given to the health needs of women working shifts. Health promotion programs specific for women shift workers are needed to improve their physical and mental health, encourage use of medical care services, and improve public health policies and systems.

• Clinical and Experimental Emergency Medicine
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• 제5권4호
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• pp.240-248
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• 2018

Objective Determine differences between faculty, residents, and nurses regarding night shift preparation, performance, recovery, and perception of emotional and physical health effects. Methods Survey study performed at an urban university medical center emergency department with an accredited residency program in emergency medicine. Results Forty-seven faculty, 37 residents, and 90 nurses completed the survey. There was no difference in use of physical sleep aids between groups, except nurses utilized blackout curtains more (69%) than residents (60%) and faculty (45%). Bedroom temperature preference was similar. The routine use of pharmacologic sleep aids differed: nurses and residents (both 38%) compared to faculty (13%). Residents routinely used melatonin more (79%) than did faculty (33%) and nurses (38%). Faculty preferred not to eat (45%), whereas residents (24%) preferred a full meal. The majority (>72%) in all groups drank coffee before their night shift and reported feeling tired despite their routine, with 4:00 a.m. as median nadir. Faculty reported a higher rate (41%) of falling asleep while driving compared to residents (14%) and nurses (32%), but the accident rate (3% to 6%) did not differ significantly. All had similar opinions regarding night shift-associated health effects. However, faculty reported lower level of satisfaction working night shifts, whereas nurses agreed less than the other groups regarding increased risk of drug and alcohol dependence. Conclusion Faculty, residents, and nurses shared many characteristics. Faculty tended to not use pharmacologic sleep aids, not eat before their shift, fall asleep at a higher rate while driving home, and enjoy night shift work less.

• 수면정신생리
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• 제17권1호
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• pp.28-33
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• 2010

목 적: 근무패턴 중 일반적인 생리 스케줄에 반한 교대순환근무가 개인의 신체적, 정신적 건강을 위협한다는 고민은 계속되어 왔다. 본 연구에서는 대표적인 교대순환근무가 이루어지고 있는 경찰 공무원을 대상으로, 주간고정근무자와 비교하였을 때 교대순환 근무자에서 수면의 질, 직무스트레스, 사건충격척도, 우울증상에 있어 차이가 있는지를 조사해 보고자 하였다. 방 법: 일 도시 지역 경찰공무원 1,145명(남성 1,040명, 여성 105명)을 대상으로 하였다. 연구 대상자들의 일반적 특성으로 근무 형태를 비롯한 사회 인구학적 정보를 조사하였고, 지난 한달 동안의 수면의 질(Pittsburgh Sleep Quality Index; 이하 PSQI), 직무스트레스척도(Korean Scale of Occupational Stress; 이하 KOSS), 사건 충격 척도 개정판(Impact of Event Scale-Revised; 이하 IES-R), 우울증 척도(Center for Epidemiologic Study-Depression; 이하 CES-D)로 구성된 설문지를 작성하도록 하였다. 결 과: 전체 대상군 중 98명(9.4%)이 CES-D 점수가 16점이 넘는 경도 이상 우울증상이 있는 집단으로 분류되었다(순환교대근무자의 9.2%, 주간고정근무자의 7.8%; 남성의 7.6%, 여성의 18.1%). 순환교대근무와 주간고정근무의 근무형태 별 CES-D 점수 평균의 차이는 통계적으로 유의하지 않았다(표 1; t=1.766, p=0.078). PSQI 점수 5점 초과의 '낮은 수면의 질'에 해당하는 군은 전체 대상군 중 178명(15.5%)으로 순환교대근무자의 18.0%, 주간근무자의 13.51%가 이에 해당되었고, 두 군 간의 점수 평균의 차이는 유의미했다(t=-1.958, p=0.050). 근무 형태 별 KOSS 평균 점수 역시 두 군 간 차이가 존재했으며(t=-2.895, p=0.004), IES-R 평균 점수에서도 유의미한 차이를 보였다(t=-2.067, p=0.039). 전체 대상군의 상관관계분석에서 나이와 성별, 학력을 보정한 후, CES-D 점수는 KOSS, PSQI, IES-R 점수와 유의한 양의 상관관계를 보였다(각각 r=0.262; p<0.000, r=0.228; p<0.000; r=0.421, p<0.000). CES-D 점수 16점 이상의 경도 이상 우울증상을 종속변수로 하고, 성별, 나이, 학력, PSQI 점수, KOSS 점수, IESR 점수, 근무형태를 독립변수로 로지스틱 회귀분석을 시행하였다. 이 중 성별(여성), 나이(20대), 높은 KOSS 점수, 높은 IES-R 점수와 교대순환 근무 여부가 CES-D 16점 이상의 우울증상을 유의하게 예측하였다(각각 Wald=5.167; p=0.023, Wald=10.432; p=0.015, Wald=41.596; p=0.000, Wald=51.784; p=0.000, Wald=5.270, p=0.022). PSQI 점수는 경도 이상의 우울증상을 유의하게 예측하지 못하였다(Wald=0.898; p=0.343). 결 론; 본 연구결과는 경찰 공무원의 우울증상에 여성, 나이, 높은 직무 스트레스와 사건충격 점수뿐 아니라 교대순환 근무 역시 우울 위험도를 높이는 인자임을 제시한다.

• Journal of Korean Biological Nursing Science
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• 제24권4호
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• pp.209-218
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• 2022

Purpose: This study aimed to investigate the relationships between the characteristics of nurses' work schedules, health outcomes, and work-life balance. Methods: This was a secondary data analysis that included 422 nurses in Korean hospitals. Descriptive analysis, independent sample t-test, one-way ANOVA, Pearson correlation analysis, and multiple linear regression analysis were used to identify the associated factors. Results: Multiple linear regression analysis showed that work-life balance was lower when atypical work was performed (β=-.14, p=.010). Nurses who did not work overtime showed a higher level of work-life balance than those who worked overtime infrequently (β=-.11, p=.002) or frequently (β=-.28, p<.001). The work-life balance level increased when nurses had better subjective health status (β=.16, p<.001) or higher sleep quality (β=.29, p<.001). It was verified that the work-life balance level was higher for single-person households than for households with two (β=-.18, p=.003), three to four (β=-.16, p=.022), or five or more (β=-.21, p<.001) persons. Conclusion: This study suggests that government and hospital organizations should provide high-quality care and consideration to nurses who do atypical or overtime work as well as their subjective health status and sleep quality. Further research should focus on the development of a policy that improves the work-life balance of nurses, especially for those who work during atypical hours.