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Relationship between Fatigue Severity and Heart Rate Variability in Middle-Aged Male Workers
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Sang Wook Song, Jin Hee Shin, Thomas Findley
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Korean Journal of Occupational and Environmental Medicine 2005;17(1):26-35. Published online March 31, 2005
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DOI: https://doi.org/10.35371/kjoem.2005.17.1.26
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 Abstract
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- OBJECTIVES
This study investigated the relationship between the severity of fatigue and the cardiac autonomic function by analyzing the heart rate variability on middle-aged male workers.
METHODS
The severity of fatigue and heart rate variability were assessed with the control measures of age, body mass index, blood pressure, alcohol consumption, smoking history, regular exercise on 82 healthy middle-aged male workers in an annual health checkup. The severity of fatigue was evaluated by the Fatigue Severity Scale (FSS), which was developed by Krupp. The 5-minute electrocardiographic recordings were analyzed as a function of the time and the frequency domain methods of the heart rate variability (HRV). Standard Deviation of the NN intervals (SDNN), Root-Mean-Square of Successive Differences (rMSSD), Total Power (TP), Low Frequency (LF: 0.04~0.15 Hz) power, High Frequency (HF: 0.15-0.4 Hz) power, LF/HF ratio were used as the indices of the HRV. For a comparison of autonomic nervous functions and other variables, the subjects were divided into three fatigue groups based on the FSS score as follows: low (N=31), moderate (N=33), high (N=18) fatigue groups.
RESULTS
There were no significant differences in age, blood pressure, heart rate, body mass index, alcohol consumption, or regular exercise except for the smoking history among the groups. In addition, there were no significant differences in the time domain analysis (SDNN, rMSSD) of HRV among the groups. Spectral analysis of the HRV showed that the mean amplitudes of the HF and LF component were lower in the high fatigue group, whereas there was no significant difference in the LF/HF ratio among the fatigue groups. There were no significant differences in the HRV indices between the smoking and non-smoking groups. No significant interacting effects between the severity of fatigue and smoking on the HRV were observed.
CONCLUSIONS
The association between severe fatigue and the reduced high and low frequency components of the HRV in middle-aged male workers reflects a dysregulation of the cardiac autonomous control. Although the pathophysiological mechanism of this association remains unclear, these results might explain their increased risk for cardiovascular disease. However, these effects need to be confirmed through a well-designed prospective study.
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Citations
Citations to this article as recorded by  - Impact of Job-stress on Fatigue Among 119 Rescue Workers
Sung-Soo Choi, Gyoung Wan Kim
Journal of the Korea Academia-Industrial cooperation Society.2016; 17(4): 433. CrossRef - The Relationship between Cyber Leisure Activity and Autonomic Function in High School Students
Mi-Eun Son, Na-Hyun Kim
Journal of Korean Biological Nursing Science.2012; 14(1): 33. CrossRef
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Effect of Hearing Impairment on the Anxiety and Depression
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Sang Wook Song, Jung Wan Koo, Won Chul Lee
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Korean Journal of Occupational and Environmental Medicine 1996;8(3):466-476. Published online December 31, 1996
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DOI: https://doi.org/10.35371/kjoem.1996.8.3.466
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Abstract
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- Hearing loss is a very common health problem throughout the world, although the number of hearing impaired individuals varies greatly in the countries. It is generally accepted that hearing impairment inevitably leads to a breakdown in communication and physical and mental health problems consequently. Nevertheless, few community based studies have been undertaken to examine both the mental and more general physical state of the hearing impaired patients. This study was conducted to evaluate the anxiety and depression in hearing impaired patients. Self-administered questionnaires including sociodemographic data were given to 336 subjects over the age of 18 years who visited the Health Management Center, Uijongbu St. Mary's Hospital for the routine health check up from January 1996 to April 1996 and three hundred seventeen samples (male: 197, female: 120) were selected. For the assessment of anxiety and depression we used Self-rating Anxiety Scale (SAS) and Self-rating Depression Scale (SDS) devised by Zung. And hearing impairment was evaluated using a Beltone Model 110 Audiometer. The results were statistically analyzed by ANOVA test and x(2) test.
The results obtained were as follow: 1. The mean anxiety scores counted by SAS of 0-15dB HL (hearing loss) group (classified by the average loss in the better ear at 500, 1,000, 2,000Hz frequencies), 16-29dB HL group, 30-44dB HL group, more than 45dB HL group were 33.1+/-6.6 32.2+/-5.9, 41. +/-8.4, 42.8+/-6.0 respectively. And the mean depression Scores counted by SDS of 0-15dB HL group, 16-29dB HL group, 30-44dB HL group, more than 45dB HL group were 37.4+/-7.7, 37.2+/-7.2, 46.2+/-8.4, 48.6+/-8.6, respectively. The more than 30dB HL group showed significant high scores in SAS and SDS than the less than 30dB HL group (p<0.001).
2. The frequency of clinically significant anxiety disorder (SAS > or = 50) was 3.4% in less than 30dB HL group and 11. 1% in more than 30dB HL group. The difference between two groups was statistically significant (p<0.05).
3. The frequency of clinically significant depression disorder (SDS > or = 50) was 5.1% in less than 30dB HL group and 39.5% in more than 30dB HL group. The difference between two groups was statistically significant (p<0.05).
4. When several important interaction variables related to anxiety: and depression (such as age, sex, marital status, education level, economic status, occupation, religion) were stratified and we compared the groups between the more than 30dB HL and less than 30dB HL, most factors about anxiety and depression showed the significant differences in two groups.
5. Multiple logistic regression analysis revealed that hearing loss(p<0.05) predicted anxiety disorder (SAS> or = 50) and hearing loss(p<0.01), age(p<0.05) predicted depression disorder (SDS> or = 50).
In conclusion, there was significant difference in anxiety and depression scores, between more than 30dB HL(in the better hearing ear) group and less than 30dB HL group. This study suggested that anxiety and depression should be considered as adverse effects of hearing impairment.
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