Annals of Occupational and Environmental Medicine

Research Article

Related factors for preserving firefighter's pulmonary function: Seonggyu Kim, Ye-eun Jeon, Hyeseung Ryu, Mi-Young Lee, Insung Chung; Ann Occup Environ Med 2020;32:e40. Published online December 18, 2020; DOI: https://doi.org/10.35371/aoem.2020.32.e40

Background

Firefighters are constantly exposed to harmful substances in the respiratory tract and require management measures. We comprehensively compared factors affecting the lung function of firefighters to identify management measures that can reduce the deterioration of lung function.

Methods

A cross-sectional study was conducted in 1,108 male firefighters. Subjects were surveyed with self-written questionnaires that included a history of smoking, number of workouts per week, work department, and medical history, including diseases that could affect lung function. Body mass index was calculated using an automatic body measurement instrument and body fat, body fat percentage, muscle mass, and skeletal muscle mass were measured using Inbody 770. Based on the body weight obtained from body measurements, skeletal muscle mass height-adjusted skeletal muscle index (hSMI) compared to height was determined. For lung function, forced expiratory volume in one second (FEV₁), forced vital capacity (FVC), FEV₁/FVC, and peak expiratory flow (PEF) were measured using a spirometer HI-801. Analysis of variance and independent t-tests were performed for univariate analysis of factors that could affect lung function, and multiple regression analysis was performed for multivariate analysis.

Results

When the factors relating lung function were analyzed using regression analysis, FEV₁ was negatively correlated with age, body fat percentage, and duty year, positively with height and hSMI. FVC increased with height and hSMI, decreased with age, body fat percentage, and duty year. FEV₁/FVC was related with age, height, body fat percentage and working history. Height and muscle mass were analyzed as related factors on PEF. When the analysis was conducted on firefighters who exercised more than 3 times a week, working history had lower relation with FEV₁ and body fat percentage had no relation with FEV₁/FVC.

Conclusion

We suggest management measures to reduce body fat percentage and increase skeletal muscle mass to maintain lung function in firefighters.

Citations

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A 7-Month Multidisciplinary Healthy Lifestyle Intervention Effectively Improved Cardiometabolic Risk Profile of Firefighters
Daniel Rodrigues Ferreira Saint-Martin, Kevin Alves Barreto, Edgard M. K. Von Koenig Soares, Marcelo Serejo Machado, Cristiana Soares dos Santos Morais, Adriana Mendonça Bonadio Barbosa, Rosenkranz Maciel Nogueira, Susanne D’Isabel, Denise L. Smith, Guilh
Journal of Occupational & Environmental Medicine.2024; 66(8): 605. CrossRef
Longitudinal lung function in urban firefighters: A group‐based multi‐trajectory modelling approach
Catherine Pendergrast, Terry Boyle, Alan J. Crockett, Roger Eston, Kylie N. Johnston
Respirology.2023; 28(3): 247. CrossRef

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Research Article

The effect of earplug training on noise protection: Jung Won Kim, Seonhee Yang, Insung Chung, Mi-Young Lee; Ann Occup Environ Med 2019;31:e34. Published online November 12, 2019; DOI: https://doi.org/10.35371/aoem.2019.31.e34

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Background

Noise-induced hearing loss is an occupational disease, and workplace noise exposure is a major hazard in Korea. Although hearing protectors effectively reduce a worker's exposure to noise, their success is compromised by the wearer's inability to fit the protectors correctly, and there are no proper training methods for using hearing protectors in small-scale industries. This study aims to evaluate the effect of earplug training on hearing protection using field microphone-in-real-ear (F-MIRE) and prevent noise-induced hearing loss.

Methods

The study population comprised 172 noise-exposed manufacturing workers who visited occupational health facilities in Daegu, South Korea, between July 2014 and September 2017. Personal attenuation ratings (PARs) were calculated with F-MIRE. Paired t-tests were used to compare the differences in PAR (dB) before and after training, and generalized estimating equations (GEEs) were used to compare the differences in PAR according to the number of trainings.

Results

Mean PARs increased after the first and second training, and the differences were statistically significant. Among the 30 participants who received all 4 trainings, PARs were significantly higher after each training than before the training. As the number of training increased, the differences in PARs significantly increased. When comparing pretraining PARs for each training session, we found statistically significant differences between the first and second training and between the second and third training, but not between the third and fourth training.

Conclusion

In this study, the short- and long-term effects of earplug training were statistically significant. In particular, the PAR before and after the fourth training showed the greatest increase, and the PARs continued to increase during each training.

Citations

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Hearing protection field attenuation estimation systems and associated training for reducing workers’ exposure to noise
Thais C Morata, Wei Gong, Christina Tikka, Alessandra G Samelli, Jos H Verbeek
Cochrane Database of Systematic Reviews.2024;[Epub] CrossRef
Evaluating the Effectiveness of Earplugs in Preventing Noise-Induced Hearing Loss in an Auto Parts Factory in China
Wei Gong, Liangliang Zhao, Ling Li, Thais C. Morata, Wei Qiu, Huiling Amy Feng, Baoli Zhu
International Journal of Environmental Research and Public Health.2021; 18(13): 7190. CrossRef

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Research Article

Spatial analysis between particulate matter and emergency room visits for conjunctivitis and keratitis: Jung-Youb Lee, Jung-Won Kim, Eun-Jung Kim, Mi-Young Lee, Chang-Wook Nam, In-Sung Chung; Ann Occup Environ Med 2018;30:41. Published online June 11, 2018; DOI: https://doi.org/10.1186/s40557-018-0252-x

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Background

The concentration of particulate matter in the air varies depending on the region because it is lightweight and generated from a variety of sources. To assess the relationship between particulate matter and eye disease, this study analyzes the concentration data obtained from spatial analysis of particulate matter and emergency visit data.

Methods

The study included 769 residents of Daegu, Korea who had visited an emergency room for the problem of conjunctivitis or keratitis. Concentrations of PM₁₀ and other air pollutants were obtained from the Korean Ministry of the Environment. PM₁₀ concentrations and the number of patients from each of 143 administrative dongs (sub-municipal level administrative units) of the city of Daegu were obtained using spatial analysis. The patient distribution and PM₁₀ concentration were mapped for comparison, and their relationship was examined using scatter plot, regression analysis, and the independent sample t-test.

Results

The number of patients with conjunctivitis and keratitis was significantly higher in the regions of the top 20% areas than the bottom 20% areas in terms of PM₁₀ concentration. The distribution of PM₁₀ concentration and number of patients was visually similar on the map. The concentration of PM₁₀ and the number of patients showed a dose–response relationship. When the concentrations of other air polluta9nts were controlled for, the numbers of conjunctivitis and keratitis patients were 0.04 per 1000 ER patients and 0.10 per 1000 ER patients, respectively.

Conclusion

As PM₁₀ is associated with the prevalence of conjunctivitis and keratitis, measures to reduce particulate matter through environmental methods are needed.

Electronic supplementary material

The online version of this article (10.1186/s40557-018-0252-x) contains supplementary material, which is available to authorized users.

Citations

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Mechanisms of PM10 Disruption of the Nrf2 Pathway in Cornea
Mallika Somayajulu, Farooq S. Muhammed, Robert Wright, Sharon A. McClellan, Linda D. Hazlett
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Sharon A. McClellan, Robert Wright, Farooq Muhammed, Linda D. Hazlett
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Air Pollution and Meteorological Conditions Significantly Associated With Vernal Keratoconjunctivitis Exacerbations
Eran Levanon, Ido Peles, Michal Gordon, Lena Novack, Erez Tsumi
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Chang Hwan Kim, Yong Woo Ji
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Mallika Somayajulu, Sharon A. McClellan, Robert Wright, Ahalya Pitchaikannu, Bridget Croniger, Kezhong Zhang, Linda D. Hazlett
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Yee Ling Wong, Shiao Wei Wong, Darren S.J. Ting, Alankrita Muralidhar, Sagnik Sen, Olivia Schaff, Hannah Istre-Wilz, Barbara Erny
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The burden of acute conjunctivitis attributable to ambient particulate matter pollution in Singapore and its exacerbation during South-East Asian haze episodes
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Science of The Total Environment.2020; 740: 140129. CrossRef
Epidemiological aspects of allergic conjunctivitis
Dai Miyazaki, Kazumi Fukagawa, Shigeki Okamoto, Atsuki Fukushima, Eiichi Uchio, Nobuyuki Ebihara, Jun Shoji, Kenichi Namba, Yumiko Shimizu
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Dry eye symptoms in offices and deteriorated work performance – A perspective
Peder Wolkoff
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Airborne Particulates Affect Corneal Homeostasis and Immunity
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Air pollution significantly associated with severe ocular allergic inflammatory diseases
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International Journal of Environmental Research and Public Health.2019; 16(19): 3652. CrossRef

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Research Article

Factors related to heart rate variability among firefighters: Jae-Hong Shin, Jung-Youb Lee, Seon-Hee Yang, Mi-Young Lee, In-Sung Chung; Ann Occup Environ Med 2016;28:25. Published online June 13, 2016; DOI: https://doi.org/10.1186/s40557-016-0111-6

Abstract PDF PubReader ePub

Objectives

The aim of this study was to investigate factors associated with heart rate variability in firefighters working in a metropolitan city in South Korea.

Methods

Self-administered questionnaires including Korean Occupational Stress Scale (KOSS) as well as surveys collecting socio-demographic characteristics and work-related factors were given to 962 firefighters. After exclusion for missing data, 645 firefighters were included, and analysis of covaiance adjusted for the general risk factors and job characteristics were used to assess the relationship between heart rate variability and associated factors.

Results

SDNN and RMSSD and were decreased in the area of occupational climate of the group with high job stress (p = 0.027, p = 0.036). HF(ln) was decreased in the area of organizational system and occupational climate of the group with high stress that statistically significant level (p = 0.034, p = 0.043).

Conclusions

Occupational climate and organizational system are associated with reduction of heart rate variability. Preventive medical care plans for cardiovascular disease of firefighters through the analysis and evaluation of job stress factors are needed.

Citations

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On-Duty Resting Heart Rate Variability at the Fire Station Is Related to Cardiorespiratory Fitness and Physical Activity Levels in Firefighters
Philémon Marcel-Millet, Philippe Gendron
Journal of Occupational & Environmental Medicine.2024; 66(3): e111. CrossRef
Evaluation of the relationship between occupational-specific task performance and measures of physical fitness, cardiovascular and musculoskeletal health in firefighters
Jaron Ras, Elpidoforos S. Soteriades, Denise L. Smith, Andre P. Kengne, Lloyd Leach
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Research Article

Minnesota multiphasic personality inventory as related factor for post traumatic stress disorder symptoms according to job stress level in experienced firefighters: 5–year study: In-Sung Chung, Mi-Young Lee, Sung-Won Jung, Chang-Wook Nam; Ann Occup Environ Med 2015;27:16. Published online June 5, 2015; DOI: https://doi.org/10.1186/s40557-015-0067-y

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Objectives

As first responders to an increasing number of natural and manmade disasters, active-duty firefighters are at increased risk for physical and psychiatric impairment as reflected by high rates of posttraumatic stress disorder (PTSD). Because little is known about related factor with PTSD according to job stress level among firefighters, we assessed utility of the Minnesota Multiphasic Personality Inventory (MMPI) using 5-year medical surveillance.

Methods

Data were analyzed from 185 male firefighters without psychiatric disease history and who at assessments in 2006 and 2011 completed all questionnaires on personal behaviors (including exercise, drinking and smoking habits) and job history (including job duration and department). MMPI, Events Scale-Revised-Korean version (IES-R-K) and Korean Occupational Stress Scale-Short Form (KOSS-SF) were used to screen for personality trait, PTSD symptom presence and job stress level, respectively. IES-R-K subgroups were compared using two-sample t- and χ2 tests, and factors influencing IES-R-K according to KOSS-SF were determined using uni- and multivariate logistic regression.

Results

Mean age and job duration were higher in PTSD-positive than negative groups. In multivariate analysis, increased PTSD risk was associated with: job duration (Odds ratio (OR) = 1.064, 95 % CI 1.012–1.118) for firefighters overall; masculinity-femininity (OR = 5.304, 95 % CI 1.191–23.624) and job duration (OR = 1.126, 95 % CI 1.003–1.265) for lower job stress level; and social introversion (OR = 3.727, 95 % CI 1.096–12.673) for higher job stress level.

Conclusions

MMPI relates with PTSD according to job stress level among experienced firefighters. Masculinity-femininity and social introversion were the strongest related factor for PTSD symptom development in low and high job stress levels, respectively.

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Research Article

Factors Related to Sleep Disorders among Male Firefighters: Dong-Kyun Lim, Ki-Ook Baek, In-Sung Chung, Mi-Young Lee; Ann Occup Environ Med 2014;26:11-11. Published online May 22, 2014; DOI: https://doi.org/10.1186/2052-4374-26-11

Abstract PDF PubReader ePub

Objectives

The aim of this study was to investigate factors associated with sleep disorders in male firefighters working in a metropolitan city in South Korea.

Methods

Self-administered questionnaires including the Nordic Musculoskeletal Questionnaire, Korean Occupational Stress Scale-Short Form, Psychosocial Well-Being Index-Short Form, Pittsburg Sleep Quality Index, and Beck-Depression Inventory-2 as well as surveys collecting socio-demographic characteristics and work-related factors were given to 730 male firefighters. After exclusion for missing data, 657 male firefighters were included, and logistic regression analysis adjusted for the work-related factors, psychosocial factors, and general risk factors were used to assess the relationship between sleep disorders and associated factors.

Results

The prevalence of sleep disorders was 48.7%. Shift work (adjusted OR 1.58, 95% CI = 1.02-2.45), musculoskeletal symptoms (adjusted OR 2.89, 95% CI = 2.02-4.14), and depression (adjusted OR 7.04 95% CI = 4.03-12.30) were associated with sleep disorders.

Conclusions

Musculoskeletal symptoms, shift work, and depression are associated with sleep disorders. Integrated health management is needed to promote good sleep quality among firefighters.

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Research Article

Pulmonary function decline in firefighters and non-firefighters in South Korea: Ju-Hwan Choi, Jae-Hong Shin, Mi-Young Lee, In-Sung Chung; Ann Occup Environ Med 2014;26:9-9. Published online April 25, 2014; DOI: https://doi.org/10.1186/2052-4374-26-9

Abstract PDF PubReader ePub

Objectives

The purpose of this study was to evaluate and compare changes to pulmonary function among firefighters and non-firefighters who were exposed to harmful substances in their work environments.

Methods

Firefighters (n = 322) and non-firefighters (n = 107) in Daegu who received a pulmonary function test in 2008 and 2011 as well as a regular health examination were included. Repeated measures ANOVA was performed to evaluate the pulmonary function of the two groups over the three-year period.

Results

After adjusting for age, height, body mass index, duration of exposure, physical activity, and smoking, which were statistically different between the two groups and known risk factors of pulmonary function, the forced expiratory volume in one s FEV₁, forced vital capacity FVC, and FEV₁/FVC% over the 3 year period were significantly lower among firefighters compared with non-firefighters.

Conclusions

Evaluating the working environment of firefighters is difficult; however, our study revealed that pulmonary function declined in firefighters. Thus, more effort should be made to prevent and manage respiratory diseases early by preforming strict and consistent pulmonary function tests in firefighters.

Citations

Citations to this article as recorded by

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