Shift Work Nurses Research Articles

0138 Exploring the influencing factors of sleep disturbance and work well-being among shift-work nurses in Taiwan

Abstract Introduction Job-related stress and sleep disturbances are common problems among registered nurses (RNs). At present, more than half of the nursing staff in Taiwan have the intention to leave, so this is a problem that cannot be ignored. This cross-sectional correlational research based on Job Demands-Resources Model aimed to explore the influencing factors of work well-being from sleep and job crafting perspective. Methods A total of 220 (13.3% was male) shift-work RNs (mean age= 30.6, SD= 6.5), were recruited from seven intensive care units of a teaching hospital in central Taiwan. All nurses completed a battery questionnaires measuring their job-related stress, sleep disturbances, fatigue severity, self-efficacy, job crafting, and work well-being. In addition, a 7-day sleep diary were collected to estimate their total sleep time (TST). Results Majority of the RNs reported poor sleep quality (61.5%), insufficient sleep quantity (62.8%), and poor daytime functioning (49.5%). According to the sleep diary, their average TST (464 minutes, SD= 91.7) was close to what they needed to feel refreshed (472 minutes, SD= 87.5); however, more than three-quarters of them experienced clinically significant fatigue before bedtime (92.3%) and after waking up (72.7%). Job-related stress was measured by the Copenhagen Psychosocial Questionnaire II, the top three stressors were from value at work level, interpersonal relations and leadership, and work organization. Sleep disturbances was correlated with poor work well-being. After controlling for personal factors (age, gender, and years in nursing) and sleep disturbances, self-efficacy, job-related stress, and job crafting explained 49.8% of work well-being; work organization, value at work level, and job crafting are the significant predictors. Conclusion Most RNs in this study reported sleep disturbances and severe fatigue, which had a negative impact on their work well-being. Job-related stress contributed to sleep disturbances, and calls for further study on job-crafting and shift work coping. Support (If Any) Changhua Christian Hospital,Taichung, Taiwan

Snacking among shiftwork nurses related to non-optimal dietary intake.

To compare nurses' non-optimal eating behaviours across different shifts, to examine whether non-day shifts were related to deviation from optimal dietary behaviours compared with day shifts and whether such deviation was related to non-optimal macronutrient intake. This is a 4-day intensive longitudinal study. A convenience sample of hospital nurses was recruited in Taiwan. From September 2018 through January 2019, 120 participants completed 4-days of 24-h dietary recalls. One-way ANOVA and Kruskal-Wallis H test were used to compare differences in energy and macronutrient intake and frequency of meals and snacking, respectively. Generalized linear regressions examined (1) the associations between shiftwork schedules and non-optimal eating behaviours and (2) associations between non-optimal eating and high energy contribution of non-optimal macronutrients. Nurses consumed less energy on evening and night shifts compared with day shifts. However, energy intake from snacking was higher on evening and night shifts relative to day shifts. Nurses consumed less meals but had higher snacking frequency on non-day shifts. In addition, high energy intake from snacking was positively associated with high energy intake from saturated fat. Nurses were more likely to have non-optimal eating behaviours on non-day shifts, which may contribute to an increased intake of saturated fat; thus, increasing their risk of chronic diseases. Strategies to improve non-day shift nurses' non-optimal eating behaviours may be beneficial to their health. Shiftwork is known to affect nurses' eating behaviours; however, which shift is associated with unhealthy eating remains inconclusive. Despite lower energy intakes, nurses had higher intake by snacking on evening and night shifts. High snacking intake was associated with a high intake of saturated fat. Hospitals can increase the availability of healthy foods on evening or night shifts, which may improve non-day shift nurses' non-optimal eating behaviours.

Working Conditions and Fatigue in Japanese Shift Work Nurses: A Cross-sectional Survey

This study aimed to identify the working conditions (working hours, overtime work, number of night shifts, number of holidays, and work intervals) associated with fatigue, based on the shift patterns, and determine their thresholds. From January to February 2020, a web-based questionnaire was sent to 4601 shift work nurses at 47 hospitals in Japan. The multivariate logistic analysis was conducted to predict high- and low-fatigue groups by working conditions, and receiver operating characteristic analysis was performed to clarify the high-fatigue thresholds by shift pattern. A total of 386 shift work nurses participated in this study. The threshold (fatigue was 3.0 or higher) of the two-shift rotation was 9hours 50minutes for daily working hours during day shifts (Odds ratio [OR]=1.57, p<.01), 17hours 15minutes for daily working hours during night shifts (OR=1.20, p<.01), and 8.0days for the number of night shifts (OR=1.09, p=.02). The threshold of the three-shift rotation was 9hours 45minutes (OR=1.59, p<.01), 2.9days for the number of midnight shifts (OR=1.53, p<.01), and 2.0 times for the interval between day-shift and night-shifts within 12hours (OR=1.39, p<.01). Working hours and the number of night shifts are important for two-shift rotation, and working hours for the assignment of midnight shift are important for three-shift rotations. Nurse managers should manage shifts according to nurses' shift patterns.

Relationship between occupational stress, sleep disturbance, and presenteeism of shiftwork nurses.

This study aimed to determine the relationships between occupational stress, sleep disturbance, and presenteeism in shiftwork nurses in South Korea. This cross-sectional study used survey data from 442 shiftwork nurses at two hospitals in South Korea. Data were collected between March 2018 and April 2020. A self-reported questionnaire was used to assess shiftwork nurses' demographic and job-related information, presenteeism, occupational stress, and sleep disturbance. Data were analyzed using descriptive statistics, multiple regression, and the PROCESS macro. The mean presenteeism score was 39.52. Multiple regression analysis revealed that job insecurity, interpersonal conflict, occupational climate, lack of reward, and job demand are significantly associated with presenteeism. Sleep disturbance was related to presenteeism and had a moderating effect on the relationship between occupational stress and presenteeism. This study indicates that proper occupational climate, positive interpersonal relationships, and adequate sleep can reduce shiftwork presenteeism. Therefore, individual and organizational efforts to alleviate occupational stress and sleep disturbances are essential. Organizational support is needed to maintain a positive occupational climate and interpersonal relationships and ameliorate sleep disturbance among shiftwork nurses.

Psychometric properties of the Japanese version of the Occupational Fatigue Exhaustion Recovery Scale among shift-work nurses.

ObjectivesShift‐work nurses are at a higher risk of inadequate recovery from fatigue and developing maladaptive fatigue with significant health consequences. Therefore, it is necessary to monitor fatigue and recovery levels with a reliable scale. We investigated psychometric properties of the Japanese version of the Occupational Fatigue Exhaustion Recovery scale (OFER‐J) for shift‐work nurses.MethodsJapanese shift‐work nurses responded to self‐administered questionnaires at baseline (n = 942) and one month later (n = 334). The confirmatory factor analysis (CFA) and exploratory factor analysis (EFA) were conducted to verify the structural validity and the correlation analysis and one‐way analysis of variance were conducted to test the construct and discriminative validity. Cronbach's alpha coefficient, intra‐class correlation coefficient (ICC), and smallest detectable change (SDC) were calculated to assess reliability.ResultsThe CFA showed high correlations between the factors and whilst the goodness‐of‐fit of the three‐factor model was suboptimal, it was in an acceptable range. Most modifications included the error covariance of the Acute Fatigue (AF) and Intershift Recovery (IR) items. The EFA showed that Chronic Fatigue (CF) and AF were not clearly separated, indicating that the two AF items dropped out. Construct and discriminative validity were also well indicated. Cronbach's alpha coefficients were 0.75–0.85. Only CF showed sufficient reproductivity (ICC = 0.74). The SDC for CF, AF, and IR was 14.0, 17.1, and 18.7, respectively.ConclusionsThe validity and reliability of the OFER‐J were verified as acceptable for shift‐work nurses. The OFER‐J could contribute to a data‐based approach to fatigue management in nursing management practice.

Sleep management experiences of shift-working nurses: A grounded theory study

BackgroundSleep management is considered as the most challenging issue for shift-working nurses. However, there is little knowledge on how they deal with the problem of insomnia caused by the shift work in the real context. MethodsWe used one-to-one, in-depth interviews for data collection and constant comparative analysis approach and memo writing for data analysis based on grounded theory that exploring 18 shift-working nurses' experiences of sleep management. FindingThe data revealed that mental tensions of a caring environment, inappropriate scheduling of shifts, inappropriate environmental conditions, and inadequate support and companionship of managers, as contextual factors, cause a sense of sleep adequacy dissatisfaction in nurses, which is the main concern about shift work. Nurses used compensatory sleeping, gradual coping, medication use, adjustment to and preparation of environmental conditions, and use of stimulant drinks as coping strategies to deal with the main concern. Despite the use of these strategies and due to their inefficiency, psychological burden, gradual physical burnout, clinical inefficiency, and unresolved sleep adequacy dissatisfaction remain as the most important negative consequences (as injury) for shift-working nurses. Therefore, shift-working nurses manage their sleep in a gradual and passive coping along with the injury. ConclusionShift-working nurses need to actively manage and adapt to their condition (shift work without injury); however, they try to cope with this condition passively by trial and error. Both nurses and their managers need to learn and develop strategies to help nurses effectively encounter and deal with insomnia caused by shift work.

Changes in Dietary Behavior of Shift Work Nurses: A Longitudinal Study

Changes in Dietary Behavior of Shift Work Nurses: A Longitudinal Study

Comparison of fatigue and sleep quality of shift-work nurses at around 20 weeks of pregnancy

Comparison of fatigue and sleep quality of shift-work nurses at around 20 weeks of pregnancy

Relationship between Work Conditions, Inequality Work-assignment and Lack of Work-life Control, and Burnout or Somatic Complaints: An Online Survey of Shift-work Nurses

Relationship between Work Conditions, Inequality Work-assignment and Lack of Work-life Control, and Burnout or Somatic Complaints: An Online Survey of Shift-work Nurses

VALIDITY AND RELIABILITY OF SHIFT WORK DISORDER QUESTIONNAIRE AMONG INDONESIAN FEMALE NURSES

Nurses on shift work experience several symptoms such as excessive sleep, insomnia, feeling tired and fatigue. This situation could be inimical to health, and lead to the conditions known as shift work disorder (SWD). A tool is needed to measure shift work disorder among shift work nurses. It can be used to understand the ailment, and support strategies to prevent it. The aim of this study was to adapt SWD questionnaire for use in Bahasa. The study was a cross-sectional study among 201 female nurses who worked on shift duties at public hospital from March to April 2020. The questionnaires were self-administered via an online platform. SWD questionnaire was measured using three questions from previous study. It was used to measure sleep disorder related to work schedule. Permission to use this questionnaire was granted by original author. The process of translation and adaptation SWD questionnaire based on WHO studies. Cronbach alpha was used to measure internal consistency reliability. Exploratory factor analysis (EFA) using principal axis factor to examine construct validity. Confirmatory factor analysis (CFA) was used to assess the structural model fit of SWD. The cronbach alpha for SWD questionnaire was 0.834, which indicated adequate reliability. All of the items in SWD questionnaire had factor loading greater than 0.32, and the CR and AVE of SWD questionnaire were 0.951 and 0.751, which indicated good convergent validity. This study validates the psychometric properties of SWD questionnaire among Indonesia Female Nurses, including translation, validity, and reliability.

Influence of shift work on rest-activity rhythms, sleep quality, and fatigue of female nurses

ABSTRACT Female nurses working rotating shifts must change their daily routines often, which affects their biological circadian rhythms and could cause sleep disorders and fatigue. The objective of this study was to compare the sleep-wake rhythms, sleep quality, and fatigue of female nurses working rotating shifts and fixed day shifts and to analyze the factors that influence their fatigue. Participants comprised a shift worker group of 101 nurses and a day worker group of 76 nurses. Following the collection of basic information of the nurses and their scores in the various constructs of the Pittsburg Sleep Quality Index (PSQI) and the Checklist Individual Strength (CIS) questionnaire, each nurse wore an actigraph for seven consecutive days to collect for analysis the sleep-wake rhythm parameter dichotomy index (I < O) and durations of continuous sleep and wake. Multivariable linear regression was then used to determine whether the influence of various variables on fatigue differed between the two groups. Results revealed that the sleep-wake rhythm parameter I < O of the day worker group was significantly higher than that of the shift worker group (t = 5.08, p < .001). The shift worker group exhibited significantly higher PSQI global scores (t = −2.00, p = .047), longer total sleep time (t = 2.07, p = .040), poorer habitual sleep efficiency (t = −3.06, p = .003), and greater use of sleeping medication (t = −2.90, p = .004) than did the day worker group. Multivariable linear regression was performed to analyze the important predictors of the CIS score in the two groups with body mass index, age, work experience, marital status, educational background, department of employment, shift type at the time of recruitment, sleep-wake rhythm parameter I < O, and quality of sleep as independent variables. Results indicated that in the shift worker group, the overall explanatory power (R2 ) of the multivariable linear regression model was 22.9% (F = 3.01, p = .003), and only the PSQI global score (β = 0.33, p = .003) influenced the CIS score. In the day worker group, the various variables did not influence the CIS score in the multivariable linear regression model. Although the female nurses working rotating shifts spent more time in bed, their sleep-wake rhythms and sleep quality were poorer than those of the day worker group. Furthermore, the sleep quality of female nurses in the shift worker group had a significant impact on their fatigue. In other words, for female nurses who must work rotating shifts, sleep quality determines whether fatigue can be reduced. The shift-working nurses themselves should implement sleep management, such as avoiding disruptions to their sleep-wake rhythm and improving sleep quality, which should be effective strategies to reduce fatigue.

Investigating the Relationship of Organizational Performance with Employment Status and Shift Work in Nurses at the Shahid Rahnemoun Hospital

Background: Performance evaluation in facilitating organizational effectiveness is considered an essential task of human resource management that depends on nurses’ employment status.&#x0D; Objectives: The present study aimed to investigate the relationship of organizational performance with employment status and shift work in nurses at the Shahid Rahnemoun Hospital, Yazd, Iran.&#x0D; Methods: This descriptive-analytical study was conducted in 2018. The sample consisted of 151 nurses who were included using census. The instrument was a standard questionnaire whose content validity was confirmed by three experts, and its reliability was approved by Cronbach’s alpha coefficient. Data analysis was performed using SPSS.22 software through independent t-test, one-way analysis of variance, and one-sample t-test.&#x0D; Results: Among the four components surveyed in the study, the highest and lowest means and standard deviations were related to “participation and cooperation” (4.35 ± 0.48) and “infection control and prevention” (4.21 ± 0.60), respectively. There was a significant relationship between total performance and the two dimensions of “care and treatment” and “participation and cooperation” with employment status (P &lt; 0.05).&#x0D; Conclusions: The results showed that the type of employment of nurses would affect the organizational performance. In an organization where employees feel job security, they will be committed to that organization and perform their duties more competently, with more motivation and satisfaction.&#x0D;

Shift nurses’ social jetlag, anxiety, and premenstrual symptoms: A cross-sectional study

<h2>ABSTRACT</h2><h3>Background</h3> Although rotating shifts are essential for nurses to ensure optimal patient care, rotating shifts expose them to an imbalanced circadian rhythm. Shift work leads to nurses experiencing diminished sleep quality, which affects their wakefulness and judgement, curtails work performance, and affects care quality. <h3>Aim</h3> To investigate the relationship among social jetlag, anxiety, and premenstrual symptoms in nurses working in 8-hour rotating shifts <h3>Methods</h3> Participants were 194 shift-working nurses in three South Korean university hospitals from March 21 to April 2 in 2021. Chronotype and social jetlag were assessed using the Munich Chronotype Questionnaire for Shift Workers. Anxiety was measured with the State-Trait Anxiety Inventory X-1. Premenstrual symptoms were measured using the Shortened Premenstrual Assessment Form. This cross-sectional study adheres to the Strengthening the Reporting of Observational Studies in Epidemiology (STROBE) guidelines. <h3>Findings</h3> Among participants, the mean overall social jetlag was 3 hours 45 minutes. Hierarchical regression analysis revealed that social jetlag (on evening shift) and anxiety significantly influenced nurses' premenstrual symptoms. Moreover, individuals' chronotype and preference to work the night shift were identified as predictors of premenstrual symptoms. <h3>Discussion</h3> Nurses working on shifts are bound to experience greater social jetlag compared with the general population and are at an elevated risk of deteriorated quality of life. Nursing managers should consider individuals' chronotypes and social jetlag when establishing shift schedules and identify strategies that relieve anxiety in nurses working in rotating shifts. <h3>Conclusion</h3> Social jetlag and anxiety adversely affect premenstrual symptoms in female nurses working in 8-hour rotating shifts.

Objectively-measured physical activity and stress levels in workers: a systematic review physical activity and stress in workers

To investigate the relationship between objectively measured physical activity and occupational stress in different work environments. This systematic review, registered in the PROSPERO database (CRD42020214884), followed the PRISMA methodology. The search took place in October/2020 in the following databases: Web of Science, SPORTDiscus, MedLine/PubMed, PsycINFO, EMBASE, OVID MEDLINE, Scielo and CINAHL. Keywords related to eligible participants (adults and workers), interventions (physical activity objectively measured), comparison (control group or baseline), outcome (stress), and study design (observational studies) were combined using Boolean terms. From 1,524 identified records, 12 articles were included, totaling 2,082 workers. 66.7% of the studies were carried out in Europe and 50.0% among health professionals. Blue collar workers (20.7% [n = 430]) and white collar workers (18.3% [n = 382]), medical resident (6.5% [n = 135]) and protection services (9.7% [n = 202]) were the predominant occupations. Physical activity was higher in blue-collar workers than in white-collar workers, and shift-working nurses were more active compared to non-shift workers and office workers. Increased mental workload was not associated with time spent on physical activities in most studies (10 [83.3%)]). Some studies showed that light physical activity was associated with higher levels of stress and moderate to vigorous physical activity was beneficial for reducing stress dimensions. In conclusion, most studies did not find an association between objectively measured physical activity and the level of stress in workers. Studies with robust methodologies and covering different groups of workers remain necessary.

The Influence of Burnout on Patient Safety Management Activities of Shift Nurses: The Mediating Effect of Compassion Satisfaction.

This study aims to investigate the levels of burnout, compassion satisfaction (CS), and patient safety management activities (PSMA) among nurses on shift work in general hospitals and to examine the mediating effect of CS on the relationship between burnout and PSMA. This was a descriptive-correlational study, conducted with a convenience sample of 301 nurses from four general hospitals. Data were collected from 1 August to 4 September 2021, using self-report questionnaires. Data were analyzed using the t-test, analysis of variance, Tukey test, Pearson’s correlation coefficient, and multiple regression analyses. Mediation analysis was performed according to the Baron and Kenny, and Sobel Tests. Significant relationships were found between shift nurses’ burnout and CS (r = −0.66, p < 0.001), burnout and PSMA (r = −0.32, p < 0.001), and PSMA and CS (r = 0.32, p < 0.001). Compassion satisfaction showed partial mediating effects on the relationship between burnout and PSMA (Z = −3.21, p = 0.001). The higher the burnout of shift-working nurses, the lower the patient safety management activity. Therefore, an effective support system at the organizational level as well as individual efforts are necessary to enhance CS and reduce burnout of shift-working nurses.

Mediating Effects of Resilience on the Relationship between Premenstrual Distress and Depression in Shift Work Nurses

목적 본 연구는 교대근무 간호사의 월경전불편감, 회복탄력성, 우울 정도를 파악하고, 월경전불편감과 우울의 관계에서 회복탄력성의 매개효과를 파악하기 위해 수행되었다. 방법 연구대상자는 경기도 소재 대학병원에 재직 중이며, 3교대 근무를 하는 간호사 132명이었다. 자료 분석은 SPSS/WIN 23.0 Program을 이용하여 실수, 백분율, 평균, 표준편차, t-test, Pearson correlation coefficient, Baron과 Kenny의 3단계 회귀분석 방법으로 분석하였다. 결과 대상자의 월경전불편감은 2.77±0.58점, 회복탄력성은 3.41±0.43점, 우울은 2.06±0.38점으로 나타났다. 월경전불편감은 월경주기의 규칙여부에 따라 유의한 차이를 보였으며, 월경주기가 규칙적인 경우에 월경전불편감이 유의하게 더 낮았다. 회복탄력성은 나이에 따라 유의한 차이를 보였고, 20대가 30대 이상에 비해 회복탄력성이 더 높게 나타났다. 회복탄력성은 월경전불편감과 유의한 음의 상관관계가 있었고, 우울은 월경전불편감과 유의한 양의 상관관계를, 회복탄력성과 유의한 음의 상관관계를 나타내었다. 매개효과 분석 결과, 교대근무 간호사의 월경전불편감과 우울의 관계에서 회복탄력성이 유의한 부분매개 변인으로 확인되었다(Z=1.99, p=.023). 결론 본 연구의 결과는 교대근무 간호사의 월경전불편감이 우울에 미치는 영향을 감소시키기 위한 교육 및 중재 개발 시 회복탄력성을 비중 있게 다룰 필요가 있음을 시사한다. 또한 관련 연구의 기초자료로 활용할 수 있을 것이다.

Assessment of the Light Exposures of Shift-working Nurses in London and Dortmund in Relation to Recommendations for Sleep and Circadian Health

Shift work causes disruption to circadian physiological processes in the human body, and desynchronization from the natural day-and-night rhythm. Circadian disruption is thought to explain the associations between shift work and various long-term diseases; light is an unrivalled synchronizer (or Zeitgeber) of circadian processes and inappropriate light exposure plausibly plays a critical role in the development of health impairments. As published measurement data on the actual light environments encountered by shift workers are sparse, nurses working in two hospitals in London (UK) and Dortmund (Germany) wore light-logging dosimetry devices to measure personal light exposures continuously over a week in three different seasons. The study identifies and quantifies several of the characteristics of light exposure related to different working patterns in winter, spring, and summer, and quantifies interindividual variations. These data enable informed design of light exposure interventions or changes to shifts to reduce unwanted effects of disruptive light exposure profiles.

Factors Affecting Occupational Health of Shift Nurses: Focusing on Job Stress, Health Promotion Behavior, Resilience, and Sleep Disturbance

BackgroundThis study aims to allow the development of efficient measures to improve occupational health of shift-working nurses focusing on job stress, health promotion behavior, resilience, and sleep disturbance. MethodsIt was conducted on a subject panel of 137 nurses who were aware of the purpose of the study and agreed to participate. They worked three shifts at a tertiary hospital or a general hospital located in metropolitan city B. The collected data were analyzed by the independent t test and one-way analysis of variance and post-tested by Scheffe's test, Pearson's correlation coefficients, and multiple linear regression analysis using SPSS/WIN 25.0. ResultsThe significant influencing factors on sleep disturbance were of those whose subjective health status was ‘normal’ (β = 0.29, p < .001), ‘not healthy’ (β = .40, p < .001), who have job stress (β = .22, p = .003), and who have health promotion behavior (β = -0.17, p = .023). The overall explanatory power was 31.1% (F = 16.31, p < .001). ConclusionThrough this study, nurses' subjective health status and job stress of working shifts were found to be important factors influencing the sleep disturbance level, and the most influencing factor was identified as the subjective health status.

Psychosocial working conditions of shiftworking nurses: A long-term latent transition analysis.

This study aimed to identify profiles of working conditions to which nurses were exposed to over time and investigate how changes in working conditions relate to shiftworking and health. Previous studies rarely addressed the issue of working conditions development over long periods and the effects of such development on nurses' health. Data from a national cohort of nurses in Sweden (N = 2936) were analysed using a person-centred analytical approach-latent profile and latent transition analysis. Nurses report better psychosocial working conditions as they progress into mid-career. Shiftworking nurses experience poorer working conditions than their dayworking counterparts and tend to move from shiftwork to daywork as they progress into mid-career. In mid-career, nurses in work environments characterized by low autonomy and support tend to report poorer health outcomes. Current analyses suggest that shiftworking nurses are particularly in need of interventions that address poor work environments. Not only do they experience more negative psychosocial working conditions than their dayworking counterparts, but they do so while having to contend with demanding schedules. The findings highlight that organisational interventions should target different aspects of the work environment for nurses in diverse stages of their careers.

Implications of Lifestyle and Occupational Factors on the Risk of Breast Cancer in Shiftwork Nurses.

Shift work that involves circadian disruption has been highlighted as a likely carcinogenic factor for breast cancer in humans. Also, unhealthy lifestyle habits observed in night work nurses could be causally related to an increase in the incidence of estrogen-positive breast tumours in this population. Assessing baseline risk of breast cancer in nurses is essential. The objective of this study was to analyze the risk of breast cancer that nurses had in relation to their lifestyle and labour factors related to shift work. A cross-sectional descriptive study through a questionnaire about sociodemographic variables, self-perception of health, and working life was designed. The sample consisted of 966 nurses. The relationship between variables was tested. A binary logistic regression and a classification and regression tree were performed. The most significant labour variables in relation to the risk of breast cancer were the number of years worked (more than 16 years; p < 0.01; OR = 8.733, 95% CI = 2.811, 27.134) and the total years performing more than 3 nights per month (10 or more years; p < 0.05; OR = 2.294, 95% CI = 1.008, 5.220). Also, the nights worked throughout life (over 500; OR = 4.190, 95% CI = 2.118, 8.287) were significant in the analysis. Nurses who had or ever had breast cancer valued their self-perceived health more negatively (p < 0.001) and referred a lower quality of sleep (p < 0.001) than the non-cases nurses. The occupational factors derived from night work could have several impacts on nurses’ health and their family-work balance. Promoting healthy lifestyles, informing about shift work risks, and adjusting shift work schedules are critical methods to decrease the possible effects of circadian disruption in nurses.