Annals of Occupational and Environmental Medicine

Research Article

Factors related with quality on sleep of daytime workers: Bu-il Kim, Seong-yong Yoon, Jin-seok Kim, Kuck-Hyeun Woo, Seong-yong Cho, Ho Lee, Jong-min An; Ann Occup Environ Med 2018;30:63. Published online October 23, 2018; DOI: https://doi.org/10.1186/s40557-018-0271-7

Background

This study was conducted to identify the sleep status of daytime workers who do not work in shifts. This study analyzed factors affecting sleep duration and sleep quality.

Methods

This study was conducted on 1171 daytime workers at a manufacturing workshop. We used a self-administered questionnaire to investigate demographic variables, work type, working period, musculoskeletal symptoms and the Pittsburgh Sleep Quality Index to assess sleep. Regular health checkup was conducted for the worker’s clinical examination.

Results

The mean sleep duration was 6.36 h and the mean score on the Pittsburgh Sleep Quality Index was 4.46. Work type and obesity were related to sleep duration. Age, obesity and musculoskeletal pain were significantly related to sleep quality. The prevalence ratio of researcher group for short sleep duration was 1.27 (95% confidence interval: 1.02–1.58). The prevalence ratio of those aged 50 years and over was 0.47 (0.25–0.91) and of those in their 40s was 0.56 (0.35–0.91) for poor sleep quality compared to those in their 20s. The prevalence ratio of the obesity group for poor sleep quality was 1.53 (1.10–2.12). The prevalence ratio of musculoskeletal pain group for poor sleep quality was 1.92 (1.29–2.84).

Conclusions

Age, obesity and musculoskeletal pain were factors affecting the poor quality on sleep of daytime workers. In addition, work type related to short sleep duration.

Citations

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Original Article

Sleep Patterns and Morning Heart Rate Variability Among Daytime Workers in Korea: Chang Ho sohn, Min Sook Kim, Hyunjoo Kim, Soo Young Kim, Ji Ho Lee, Hyung Joon Jhun, Jong Min Woo; Korean Journal of Occupational and Environmental Medicine 2005;17(3):208-215. Published online September 30, 2005; DOI: https://doi.org/10.35371/kjoem.2005.17.3.208

Abstract PDF

OBJECTIVES
This study was performed to evaluate the sleep patterns in a population of Korean labor workers and to assess the activity of the autonomic nervous system in relation to sleep habits.
METHODS
A sampler of 1238 daytime workers (male 911, female 327) completed questionnaires on sleep habits and their short term heart rate variability(HRV) was also examined. We used the SA-2000 (medi-core) instrument for 5 minutes for each participant in the morning and performed basic physical examinations including height, weight, and blood pressure.
RESULTS
Bed time and wake up time were negatively correlated with age, while the frequencies of waking up through the night and in the early morning showed positive correlation with age. We found that bed time and wake up time during weekdays, sleep latency during weekdays, frequency of waking up through the night, and the degree of sleepiness all varied significantly according to the average nightly amount of sleep within the last week. There was a positive correlation between wake up time at weekdays with mean heart rate. However, the other variables of sleep habits and pattern did not show significant correlation with HRV.
CONCLUSION
Among Korean daytime workers, sleep phases become advanced with aging. In spite of the aging processes, general sleep health seems to be maintained among the healthy worker group. However, short-term HRV was not useful parameter to measure the alternation of autonomic nervous system resulting from the difference of sleep habits and pattern.

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Factors related with quality on sleep of daytime workers
Bu-il Kim, Seong-yong Yoon, Jin-seok Kim, Kuck-Hyeun Woo, Seong-yong Cho, Ho Lee, Jong-min An
Annals of Occupational and Environmental Medicine.2018;[Epub] CrossRef
Temperament and Character Traits, Heart Rate Variability and Occupational Stress in New Nursing Employees
Min Soo Ko, Yong Lee Jang, Jin Sook Choi, Hyun Bo Shim, Hee Jung Nam, Mee Suk Wang, In Deok Lee, Hae Woo Lee
Journal of Korean Neuropsychiatric Association.2016; 55(3): 271. CrossRef

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