Annals of Occupational and Environmental Medicine

Research Article

The responses of subjective feeling, task performance ability, cortisol and HRV for the various types of floor impact sound: a pilot study: Seok Hyeon Yun, Sang Jin Park, Chang Sun Sim, Joo Hyun Sung, Ahra Kim, Jang Myeong Lee, Sang Hyun Lee, Jiho Lee; Ann Occup Environ Med 2017;29:13. Published online May 15, 2017; DOI: https://doi.org/10.1186/s40557-017-0168-x

Background

Recently, noise coming from the neighborhood via floor wall has become a great social problem. The noise between the floors can be a cause of physical and psychological problems, and the different types of floor impact sound (FIS) may have the different effects on the human’s body and mind. The purpose of this study is to assess the responses of subjective feeling, task performance ability, cortisol and HRV for the various types of floor impact.

Methods

Ten men and 5 women were enrolled in our study, and the English listening test was performed under the twelve different types of FIS, which were made by the combinations of bang machine (B), tapping machine (T), impact ball (I) and sound-proof mattress (M). The 15 subjects were exposed to each FIS for about 3 min, and the subjective annoyance, performance ability (English listening test), cortisol level of urine/saliva and heart rate variability (HRV) were examined. The sound pressure level (SPL) and frequency of FIS were analyzed. Repeated-measures ANOVA, paired t-test, Wilcoxon signed rank test were performed for data analysis.

Results

The SPL of tapping machine (T) was reduced with the soundproof mattress (M) by 3.9–7.3 dBA. Impact ball (I) was higher than other FIS in low frequency (31.5–125 Hz) by 10 dBA, and tapping machine (T) was higher than other FIS in high frequency (2–4 k Hz) by 10 dBA. The subjective annoyance is highest in the combination of bang machine and tapping machine (BT), and next in the tapping machine (T). The English listening score was also lowest in the BT, and next in T. The difference of salivary cortisol levels between various types of FIS was significant (p = 0.003). The change of HRV parameters by the change of FIS types was significant in some parameters, which were total power (TP) (p = 0.004), low frequency (LF) (p = 0.002) and high frequency (HF) (p = 0.011).

Conclusions

These results suggest that the human’s subjective and objective responses were different according to FIS types and those combinations.

Citations

Citations to this article as recorded by

Quantifying the Effect of Noise on Cognitive Processes: A Review of Psychophysiological Correlates of Workload
Jan Grenzebach, Erik Romanus
Noise and Health.2022; 24(115): 199. CrossRef

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Review

Historical review of the List of Occupational Diseases recommended by the International Labour organization (ILO): Eun-A Kim, Seong-Kyu Kang; Ann Occup Environ Med 2013;25:14-14. Published online August 5, 2013; DOI: https://doi.org/10.1186/2052-4374-25-14

Abstract PDF PubReader ePub

The list of occupational diseases established in the international and national legal system has played important roles in both prevention of and compensation for workers’ diseases. This report reviewed the historical development in the ILO list of occupational diseases and suggested implications of the trends. Since the first establishment of the ILO list of occupational diseases in 1925, the list has played a key role in harmonizing the development of policies on occupational diseases at the international level. The three occupational diseases (anthrax, lead poisoning, and mercury poisoning) in the first ILO list of occupational diseases, set up in 1925 as workmen’s compensation convention represented an increase of occupational diseases from the Industrial Revolution. Until the 1960s, 10 occupational diseases had been representative compensable occupational diseases listed in Convention No. 121, which implies that occupational diseases in this era were equated to industrial poisoning. Since 1980, with advancements in diagnostic techniques and medical science, noise-induced hearing loss, and several bronchopulmonary diseases have been incorporated into the ILO occupational list. Since 2002, changes in the structure of industries, emerging new chemicals, and advanced national worker’s compensation schemes have provoked the ILO to revise the occupational disease list. A new format of ILO list appended in Recommendation 194 (R194) was composed of two dimensions (causes and diseases) and subcategories. Among 50 member states that had provided their national lists of occupational diseases, until 2012 thirty countries were found to have the list occupational diseases having similar structure to ILO list in R194.

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Original Article

Development of a Fatigue Symptom Checklist for Commercial Drivers: An Experimental Trial: Kyoung Ok Park, Myung Sun Lee, Sang Hyuk Jung, In Seok Kim, Young A Oh; Korean Journal of Occupational and Environmental Medicine 2004;16(3):287-302. Published online September 30, 2004; DOI: https://doi.org/10.35371/kjoem.2004.16.3.287

Abstract PDF

OBJECTIVES
Fatigue is a primary human factor for decreased job performance in the workplace. It is well documented that drowsiness is a typical symptom of fatigue and is closely associated with commercial drivers'safety and well-being. However, few studies have been conducted to develop or validate fatigue symptom instruments for a working population. The main purpose of this study was to develop a general fatigue checklist and a driving fatigue checklist for Korean commercial drivers.
METHODS
A total of 287 bus drivers in a commercial transportation company participated in a self-administered survey that was designated Study 1. Based on the statistical results of Study 1, a focus meeting with 16 professional consultants was conducted to revise the fatigue symptom instrument for Study 2. In Study 2, 288 commercial drivers (156 bus drivers and 132 truck drivers) participated in the revised questionnaire survey. All collected responses were entered into a SPSS worksheet and the data analysis was conducted using SPSS software 11.1. The exploratory factor analysis used in this study followed the principle component factoring rule and the varimax rotation method for factor extraction. The criteria for item selection were an Eigen value of 1.0 or greater, a communality score of .50 or greater, and no 'fence rider'property over the extracted factors.
RESULTS
Through Study 1, the consultant meeting, and Study 2, a general fatigue checklist was developed with a total of 3 factors and 11 items, and a driving fatigue checklist was developed with 2 factors and 10 items. The 3 factors of the general fatigue checklist were physical fatigue, psychological fatigue, and chronic tiredness. The two factors of the driving fatigue checklist were physical fatigue and perceptive and functional fatigue.
CONCLUSIONS
The primary contents of general fatigue were different from those of driving fatigue according to the two fatigue instrument factors developed in this study. The primary fatigue symptoms of the commercial driving population were identified as physical fatigue and perceptive and functional fatigue.

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Fatigue and poor sleep are associated with driving risk among Korean occupational drivers
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Original Article

Development of a Baseline Checklist for CTD Risk Assessment: Donghyun Park, Sang Hwan Han, Dong Bin Song; Korean Journal of Occupational and Environmental Medicine 1998;10(2):251-266. Published online May 31, 1998; DOI: https://doi.org/10.35371/kjoem.1998.10.2.251

Abstract PDF: Today, CTDs (Cumulative Trauma Disorders) are one of major hazards in the US and European Industries disrupting work schedules, productivity and increasing workers compensation costs. The increase in injuries and their associated costs has led companies to form committees and implement programs to address this problem. Therefore, it is important that quantitative analysis tools help identify and assess industrial tasks that pose risk to workers. However, the process of quantifying risk in upper limb tasks is still in its infancy stage and calls for better measurement techniques are not going unheard. As the first work of quantification, baseline CTD checklist for risk assessment was developed in this study. It was mainly based on previous literature regarding CTDs. The checklist was unique in that its expected user was industrial hygienist who did not have much ergonomic background and in that it was targeted to Korean workers in various types of industries. As the first application of the checklist, some jobs in two industries (VDT, heavy Industry) were evaluated, and compared with the medical data. Eighteen out of thirty items in the checklist was univariately significant (p<0.05) on the results of medical examinations. The correlation between medical data and total risk score from the checklist was 0.62. The feasibility of its use by an industrial hygienist was also checked by comparing with the results by an ergonomist. Their correlation (on the basis of Kendall's tau-b) in terms of total risk score was 0.74. The checklist in this study shows reasonably good performance for the first trial. Further research will have to include continuous refinement and validation for many more industries and many more jobs.

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Original Article

Cumulative Trauma Disorders Among Shipyard Workers and Application of Baseline Checklist for Risk Assessment: Sang Hwan Han, Nam Jong Paik, Donghyun Park, Ki Eon Jang, Myung Hag Lee, Jong Tae Park, Dae Sung Kim, Yeon Sook Lee, Kyung Ja Paik, Young Soo Shin, Dong Bin Song; Korean Journal of Occupational and Environmental Medicine 1997;9(4):579-588. Published online December 31, 1997; DOI: https://doi.org/10.35371/kjoem.1997.9.4.579

Abstract PDF

Cumulative trauma disorders were surveyed in a cross-sectional study of 100 male ship yard workers and 43 male office workers. And baseline checklist for risk assessment of cumulative trauma disorders was applicated in a ship making process. Cases of cumulative trauma disorders were defined using physical examinations and electronic diagnostic methods. Data on demographics, individual factors (medical condition), work organization and psychosocial aspects of work were obtained by questionnaire. Association between the above factors and cumulative trauma disorders were assessed by multiple logistic regression models. 29(29 %) participants of male shipyard workers and 4(9.2 %) study subjects of male office workers met our case definitions for cumulative trauma disorders. The myofascial pain syndrome of neck muscles(12 % of participants) and carpal tunnel syndrome(5 % of participants) were the major two medical conditions in shipyard workers. The odds of male shipyard workers for cumulative trauma disorders to male office workers was 3.15 after adjustment of age(95 % C.I. :2.25-5.44). And the variables such as duration of present job, HIVD condition, and surges in workload were associated at least one of the cumulative trauma disorders in the final models (p<0.05) . This study indicates that work related upper extremity musculoskeletal disorders are relatively common among shipyard workers, and shows that the psychosocial factors is not likely to be related to the occur rences of these disorders in heavy workers. Also we developed baseline checklist for risk assessment of cumulative trauma disorders. The checklist was unique in that its expected users were industrial hygienists and occupational healthing nurses who did not have much ergonomic background and in that it was targeted to Korean workers in various types. As the first application of the checklist, shipyard workers were evaluated.

Citations

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Medical Managements of Musculoskeletal Diseases in Shipbuilding Industry
Jong-Eun Kim, Young-Ki Kim, Dong-Mug Kang
Journal of the Ergonomics Society of Korea.2012; 31(1): 157. CrossRef
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Won‐Jun Choi, Young‐Joong Kang, Ji‐Young Kim, Sang‐Hwan Han
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Original Article

A Study on the Psychological Symptoms of Hospitalized Pneumoconiosis Patients: Comparison with pneumoconiosis Examinees, Coal Miners, and Other Manual Workers: Kyung Young Rhee, Ho Keun Chung; Korean Journal of Occupational and Environmental Medicine 1990;2(2):166-178. Published online August 31, 1990; DOI: https://doi.org/10.35371/kjoem.1990.2.2.166

Abstract PDF: The purpose of this study was to investigate the effect of hospitalization and diagnosis of disease on the mental health of coal workers' pneumoconiosis patient. The study subjects were composed of four groups for comparison; hospitalized coal workers' pneumoconiosis, healthy coal miners, and railroad workers employed by government. About a hundred of respondents in each group were sampled by random. Mental health data were collected by symptom distress checklist 90 (SCL-90), and other characteristics were collected by interview with questionnaire administered trained interviewers in each respondents. Mental health dimension was classified into 9 dimensions; somatization, obsessive-compulsiveness, interpersonal sensitivity, depression, anxiety, hostality, phobic anxiety, paranoid, psychosis. And as total index, global severity index, positive symptoms total, positive symptom distress index were also computed. As a result there is difference of mean score of 9 symptom dimensions among four groups. The mean score of the examinees of depth diagnosis of the impressed coal workers' pneumoconiosis is the highest score in all 9 symptom dimensions. However in the hospitalized coal workers' pneumoconiosis scores of somatization, depression, anxiety, and phobic anxiety were still higher than that of healthy coal miners. And other symptom dimensions were not different from that of healthy coal miners.

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Original Article

Psychological Symptoms Analysis of Night Duty Workers by Symptom Checklist-90-Revision: Chang Yeop Kim, Bong Yul Huh; Korean Journal of Occupational and Environmental Medicine 1989;1(2):228-235. Published online November 30, 1989; DOI: https://doi.org/10.35371/kjoem.1989.1.2.228

Abstract PDF

Many physical and psychological problems, involved in shiftwork were noted, including peptic ulcer, rheumatoid arthritis, sleep disturbances, anxiety, etc. But emotional and psychological problems in nighttime workers were not sufficientiy investigated. To evaluate psychological problems encountered by night duty workers, Symptom Checklist-90-Revision was administered to 61 workers, including 47 night duty workers and 14 ordinary daytime workers, and the results of the both groups were compared. 1. Of 9 symptom dimensions, depression and hostility showed significantly higher scores in night duty workers. 2. Three global indicies(GSI, PST, PSDI) of night duty workers were higher than those of daytime workers, but statistically not significant. 3. Scores in all symptom dimensions, except somatization and hostilithy, of investigation group were lower than those of norm group. 4. In night duty workers, duration of night-time work per day was positively correlated with depression, anxiety, phobic anxiety and psychoticism. From the above results, it was suggested that psychological health maintenance program should be developed for night duty workers.

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