The influence of altered circadian rhythm on sleep quality and cognition among shift workers of KLE Hospital: A comparative study (original) (raw)
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2014
Introduction: The exposure to shift works, and especially to night shift, goes against the circadian rythmicity of the social man, which brings about a multitude of disruptive effects on health. In a hospital environment, such night shift is necessary so as to ensure the continuity of care. Sleep and vigilance disorders related to this work mode are frequent and often pose adaptation problems. The objective of this study is to detect the harmful effects of night shift on sleep, vigilance and the
Int J Occup Saf Ergon, 2017
Introduction. The aim of this study was to evaluate the effects of consecutive night shifts (CNS) and shift length on cognitive performance and sleepiness. Materials and methods. This study evaluated the sleepiness and performance of 30 control room operators (CROs) working in 7 nights, 7 days, 7 days off (7N7D7O) and 30 CROs working in 4 nights, 7 days, 3 nights, 7 days off (4N7D3N7O) shift patterns in a petrochemical complex on the last night shift before swinging into the day shift. To assess cognitive performance, the n-back test, continuous performance test and simple reaction time test were employed. To assess sleepiness, the Karolinska sleepiness scale was used. Results. Both schedules indicated that the correct responses and response times of working memory were reduced (p = 0.001), while intentional errors and sleepiness increased during the shift work (p = 0.001). CNS had a significant impact on reaction time and commission errors (p = 0.001). Conclusion. The main duty of CROs at a petrochemical plant is checking hazardous processes which require appropriate alertness and cognitive performance. As a result, planning for appropriate working hours and suitable number of CNS in a rotating shift system is a contribution to improving CRO performance and enhancing safety.
The relationship between shift work and sleep patterns in nurses
The scope of this study was to evaluate the sleep/wake cycle in shift work nurses, as well as their sleep quality and chronotype. The sleep/ wake cycle was evaluated by keeping a sleep diary for a total of 60 nurses with a mean age of 31.76 years. The Horne & Östberg Questionnaire (1976) for the chronotype and the Pittsburgh Sleep Quality Index (PSQI) for sleep quality were ap- plied. The results revealed a predominance of in- different chronotypes (65.0%), followed by mod- erately evening persons (18.3%), decidedly evening persons (8.3%), moderately morning per- sons (6.6%) and decidedly morning persons (1.8%). The sleep quality perception was ana- lyzed by the visual analogical scale, showing a mean score of 5.85 points for nighttime sleep and 4.70 points for daytime sleep, which represented a statistically significant difference. The sleep/ wake schedule was also statistically different when considering weekdays and weekends. The PSQI showed a mean of 7.0 points, characterizing poor sleep quality. The results showed poor sleep qual- ity in shift work nurses, possibly due to the lack of sport and shift work habits. Key words Sleep, Shift work, Nurses, Circadian rhythm, Worker’s health
International journal of physiology, pathophysiology and pharmacology, 2020
BACKGROUND Circadian rhythm is intracellular molecular mechanisms, influenced by environmental factors such as light, noise, mealtime, and sleep pattern. Shift work affects the sleep pattern, mealtime and psychological aspects of workers. This study aims to compare the effect of shift work on circadian dysynchrony among nurses in two different groups based on the duration of shift work. MATERIAL AND METHOD It was a cross-sectional, preliminary study done at a tertiary care teaching hospital in North India. The study enrolled 170 nurses (aged <35 years) performing shift duties for last 3 years (group-1) and 1 year (group-2) respectively in a 1:1 ratio. Tools used to collect data were case reporting form (demographic and clinical variables, anthropometric measures), Hamilton Anxiety Rating Scale, and Pittsburg Sleep Quality Index. RESULTS Mean age of participants was 27.39±2.89 vs. 26.14±2.45 in group 1 and 2. We found significant positive correlation of duration of shift work with...
Field Study of Effects of Night Shifts on Cognitive Performance, Salivary Melatonin, and Sleep
Safety and Health at Work, 2018
Background: Night shift work is associated with many problems such as sleep deprivation, sleepiness, decreased cognitive performance, increased human errors, and fatigue. This study set out to measure cognitive performance, melatonin rhythms, and sleep after different consecutive night shifts (7 vs. 4) among control room operators (CORs). Methods: The participants included 60 CORs with a mean age of 30.2 years (standard deviation, 2.0) from a petrochemical complex located in Southern Iran. Cognitive performance was assessed using the n-back task and continuous performance test. To evaluate melatonin, saliva was collected and tested by enzymelinked immunosorbent assay. To assess sleep and sleepiness, the Pittsburgh Sleep Quality Index and Karolinska Sleepiness Scale were used, respectively. Results: Individuals who worked 7 consecutive night shifts had a significantly better cognitive performance and sleep quality than those who worked 4 consecutive night shifts. However, salivary melatonin profile and sleepiness trend were not affected by shift type. Conclusion: The main duty of CORs working night shifts at the studied industry included managing safety-critical processes through complex displays; a responsibility that demands good cognitive performance and alertness. It is suggested that an appropriate number of consecutive night shifts in a rotating shift system should be planned with the ultimate aim of improving CROs performance/alertness and enhancing safety.
Healthcare Shift Workers’ Sleep Quality, Daytime Sleepiness and Circadian Preference
Comprehensive Medicine
Objective: It was aimed to evaluate sleep quality, daytime sleepiness, and circadian rhythm types in healthcare workers working in shifts at different periods. Materials and Methods: This cross-sectional study was conducted on 125 healthcare workers in a tertiary hospital between November and December 2018. Data were collected using Epworth Sleepiness Scale, Morningness-Eveningness Questionnaire, and Pittsburgh Sleep Quality Index. Participants were divided into four groups: Those who do not work in shifts (Group 1), those who work in shifts between 18:00 and 24:00 (Group 2), those who work in shifts between 18:00 and 08:00 (Group 3), and all shift workers (Group 4). Results: When Epworth Sleepiness Scale scores were compared, it was found that Group 4 (p=0.015) and Group 2 (p=0.007) were significantly more sleepy than Group 1. When the Morningness-Eveningness Questionnaire results were compared, no significant difference was found between the groups in terms of both morningness, eveningness, and intermediate chronotypes, and MEQ scores. According to the Pittsburgh Sleep Quality Index total score, Group 2 (p=0.005), Group 3 (p=0.003), and Group 4 (p=0.001) had significantly more impaired sleep quality than Group 1. Conclusion: Among healthcare workers, shift work is associated with poor sleep quality and excessive daytime sleepiness (EDS). When we compare the shift groups, although no significant relationship was found, Group 2 had relatively low sleep quality and EDS compared to Group 3. Although the weekly working time (h/week) is significantly less, we think that the main factor is that the weekly working periods of the Group 2 are more frequent than the Group 3.
Comparison of Sleep Quality in Two Groups of Nurses With and Without Rotation Work Shift Hours
Background & Aim : Nurses with the nature of their own career and profession confronting with many issues and tension in their work environment and different work shifts in day and night time make them susceptible to sleep disorders, particularly where the majority of nurses are females who have the responsibilities of caring of their families and other social and professional roles which limits the period of their sleep time. Therefore, this study is conducted with the purpose of comparison of sleep quality in two groups of nurses with and without rotation work shift hours. Material & Method : This study was a descriptive comparative desing with the sample size of 520 nurses that were selected with the stratified sampling method who have been working in different work shift hours in teaching hospitals of Iran University of Medical Sciences. The data collection instrument was Pittsburg Sleep Quality Index(PSQI). Results : The findings showed that %69.6 of the subjects had a good quality of sleep and the remainder (% 30.4) had a bad sleep quality. About % 56.2 of the subjects with the rotation work shift had a good sleep quality and %43.8 had a bad sleep quality. The result of Chi-Square test showed that there is a significant difference between sleep quality among nurses with fixed and unfixed work shift hours. In other words, the nurses without rotation work shifts had better sleep quality than the nurses with rotation work shifts. Conclusion : Proper and efficient management of nursing work settings and accurate planning in work shifts are suggested to reduce nurses' sleep disorders. Improving sleep quality in nurses could increase their general health and ultimately promote the quality of caring in patients.
Annals of Tropical Medicine & Public Health, 2021
Objectives: Humans generally have two times, which are daytime for activity and night for rest (circadian rhythm). Shift system of working can cause a lack of sleep or disruption of a person's sleep cycle, especially those who have a night shift. The shift of working can cause sleep deprivation of the nurses. This study aim was to identify the differences in sleep quality between nurses with two-shifts of work and nurses with three-shifts of work. Method: This study conducted on June-July 2019 in one private hospital in Jakarta, with a cross-sectional approach. This study used quantitative method. The sample of this study was 90 nurses (two-shifts: n=35; three-shifts: n= 55). Pittsburgh Sleep Quality Index was used as the instrument that has passed for Validity and Reliability (Chronbach alpha=0.820). Univariate and Mann-Whitney U were used to analyze the data. Results: This study found that most of the respondents were women (83,3%), range of ages 26-65 (51,11%), and nurses with two-shifts have poor sleep quality as 15.56%, nurses with three-shifts have poor sleep quality as 46.67%. There are differences in sleep quality between nurses with two-shifts and nurses with three-shifts (p value= 0.002). Conclusion: The shift work system can cause poor sleep quality of the nurses, especially for the nurses with threeshifts. Future researches expected to explore the factors that affect the poor sleep quality of nurses.