Annals of Occupational and Environmental Medicine

Research Article

Evaluation of the prevalence of musculoskeletal symptoms, presumptive diagnosis, medical care use, and sick leave among female school meal service workers: Young Hoon Moon, Young Joon Yang, Sang Yoon Do, Jae Yoon Kim, Chul Gab Lee, Hong Jae Chae, Soo Hyeon Kim, Han Soo Song; Ann Occup Environ Med 2019;31:1. Published online January 15, 2019; DOI: https://doi.org/10.1186/s40557-019-0281-0

Background

Most of the school meal service workers in Korea are middle-aged individuals. They have high workload, which increases their incidence of musculoskeletal disorders. This study aimed to evaluate the prevalence and risk factors of subjective musculoskeletal symptoms, presumptive diagnosis, medical care use, and sick leave among female school meal workers.

Methods

We analyzed the results of musculoskeletal disease screening of 1581 female school meal workers. The screening consisted of self-administered questionnaire, history taking by occupational physicians, and physical examination. The prevalence of subjective musculoskeletal symptoms, presumptive diagnosis after initial examination by occupational physicians, use of medical care for more than 7 days, and sick leave due to musculoskeletal diseases during the past year were evaluated in this study. The relative risk of four outcome indicators of musculoskeletal disorders was compared with respect to potential factors, such as age, subjective physical loading, present illness, injury experience, and type of school, using log-binomial regression.

Results

The prevalence of subjective musculoskeletal symptom was 79.6%; presumptive diagnosis, 47.6%; hospital visits over 7 days, 36.4%; and sick leave, 7.3%. The relative risk of musculoskeletal symptoms by age (≥50 years vs < 50 years) was 1.04 (95% confidence interval (CI): 1.00–1.09); presumptive diagnosis of musculoskeletal disease, 1.17 (95% CI: 1.06–1.30); hospital visits over 7 days, 1.26 (95% CI: 0.85–1.85); and sick leave, 1.17 (95% CI: 1.02–1.34). The relative risk of musculoskeletal symptoms due to subjective physical loading (very hard vs low) was 1.45 (95% CI: 1.33–1.58); presumptive diagnosis, 2.92 (95% CI: 2.25); hospital visits over 7 days, 1.91 (95% CI: 1.02–3.59); and sick leave, 2.11 (95% CI: 1.63–2.74).

Conclusions

Subjective physical loading was a more important factor in musculoskeletal disorders than the age of female school meal workers.

Citations

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Epidemiology of work-related injuries, musculoskeletal disorders and dermatitis among hospital food service workers in a tertiary hospital in Asia
Kenneth Bao Ren Leong, Qin Xiang Ng, Wee Hoe Gan, Wee Tong Ng, John Wah Lim
Journal of Occupational Medicine and Toxicology.2024;[Epub] CrossRef
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Christopher J. Hodgetts, Charlotte Leboeuf-Yde, Amber Beynon, Bruce F. Walker
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Lito M AMIT, Gerald T MALABARBAS
Journal of UOEH.2020; 42(2): 151. CrossRef

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Case Report

Two Cases of Methemoglobinemia Induced by the Exposure to Nitrobenzene and Aniline: Chang Hwan Lee, Soo Hyeon Kim, Do Hyung Kwon, Keun Ho Jang, Yong Hoon Chung, Jai Dong Moon; Ann Occup Environ Med 2013;25:31-31. Published online November 1, 2013; DOI: https://doi.org/10.1186/2052-4374-25-31

Abstract PDF PubReader ePub

Objective

To report two cases of methemoglobinemia induced by inhaled nitrobenzene and dermally absorbed aniline.

Methods

We have evaluated a 37-year-old male worker exposed to nitrobenzene by inhalation while conducting maintenance job of mononitrobenzene pump and a 25-year-old male worker exposed dermally to aniline while unloading.

Results

The first case is a 37-year-old male exposed to nitrobenzene. His blood methemoglobin concentration level was initially 19.8%, and chest X-ray was normal. After oxygen therapy, the blood methemoglobin concentration level decreased to 2.1%, and the symptoms were alleviated. The second case is a 25-year-old male exposed dermally to aniline. His chest X-ray was normal, but blood methemoglobin concentration level reached maximally 46.8%. He was treated with methylene blue due to relatively high blood methemoglobin level. Gradually after the treatment, his methemoglobin concentration level was normalized to 0.8% and simultaneously symptoms were resolved.

Conclusions

After the thorough exposure investigations and medical evaluations, we have concluded that these cases were methemoglobinemia induced by occupational exposure to nitrobenzene and aniline. We suggest that businesses which handle methemoglobinemia-causing substances control the engineering process strictly, implement periodic screening, and establish emergency patient management system.

Citations

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Singapore Medical Journal.2024; 65(Suppl 1): S24. CrossRef
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Journal of Clinical and Scientific Research.2023; 12(Suppl 2): S123. CrossRef
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Guillaume Mortamet, Mehdi Oualha, Sylvain Renolleau, Christian Moesch, Jean-Marc Treluyer
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Philip A. Smith, Jeffrey Lodwick, Joe Dartt, Jenny R. Amani, Kathleen M. Fagan
Journal of Occupational and Environmental Hygiene.2017; 14(1): D13. CrossRef
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Changhwan Lee, Eun Jung Jang, Hyesun Yum, Young Shik Choi, Jeongik Hong
Clinical Toxicology.2017; 55(7): 678. CrossRef
Crystal structure of bis(prop-2-yn-1-yl) 5-nitroisophthalate
K. S. Ezhilarasi, Sivasamy Selvarani, Perumal Rajakumar, B. K. Revathi, G. Usha
Acta Crystallographica Section E Crystallographic Communications.2015; 71(6): o435. CrossRef
The painted shoes
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