Abstract
Some studies show that exposure to lead affects sleep quality and causes digestive disorders. The aim of this study was to evaluate the quality of sleep and digestive disorders in solderers exposed to lead. In a cross-sectional study, the occupational exposure of 40 soldering workers to lead fume and their blood lead levels were measured in the electronics industry of Neyshabur city, according to standard methods. The sleep quality of workers was measured by the Pittsburgh Sleep Quality Index (PSQI) questionnaire and their digestive disorders were recorded in a checklist. This study showed that 67.5% of subjects had poor sleep quality. There was a significant relation between sleep quality, air lead (p = 0.02), and blood lead (p = 0.03). Bad sleep quality was 2.4 times higher in subjects exposed to lead above the threshold (p = 0.03). 92.5% of the population under study suffered from at least one digestive disorder. Digestive disorders such as hiccupping (85%) and nausea (67%) were more common among the workers, and their odds was 3.09 and 2.00 times higher in workers exposed to lead above the threshold, compared with others. Bad sleep quality and gastrointestinal disorders were prevalent among workers exposed to lead. The results of this study confirm the need for further research about the side effects of lead on humans. It also clarifies the need for a revision in the recommended occupational exposure level for lead.
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References
Agency for Toxic Substances and Disease Registry (ATSDR). (2005). Toxicological profile for lead, US Department of Health and Human services (pp. 102–125). Atlanta: US Government Printing.
Alakoc, C., & Eroğlu, H. E. (2011). Determining mitoticindex in peripheral lymphocytes of weldersexposed to metalarc welding fumes. Turkish Journal of Biology, 35(3), 325–350.
Altevogt., B. M., & Colten, H. R. (2006). Sleep disorders and sleep deprivation: an unmet public health problem. National Academies Press; An Unmet Public Health Problem. Available: http://www.nap.edu/catalog/11617.html.
Arasaratnam, M., et al. (2004). Occupational lead exposure of soldering workers in an electronic factory. Journal of Occupational Safety and Health, 95, 49.
Barkhordari, A., et al. (2014a). The toxic effects of silver nanoparticles on blood mononuclear cells. The International Journal of Occupational and Environmental Medicine, 5(3), 164–168.
Barkhordari, A., et al. (2014b). The glycoprofile patterns of endothelial cells in usual interstitial pneumonia. The International Journal of Occupational and Environmental Medicine, 5(4), 201–207.
Bener, A., et al. (2001). A pilot survey of blood lead levels in various types of workers in the United Arab Emirates. Environment International, 27(4), 311–314.
Braun, J. M., et al. (2014). Relationships between lead biomarkers and diurnal salivary cortisol indices in pregnant women from Mexico City: a cross-sectionalstudy. Environmental Health, 13(1), 50.
Buysse, D. J., et al. (1989). The Pittsburgh Sleep Quality Index: a new instrument for psychiatric practice and research. Psychiatry Research, 28(2), 193–213.
Chau, N., et al. (2004). Correlates of occupational injuries for various jobs in railway workers: a case-control study. Journal of Occupational Health, 46(4), 272–280.
Chuang, H.-C., et al. (2018). Pulmonary exposure to metal fume particulate matter cause sleep disturbances in shipyard welders. Environmental Pollution, 232, 523–532.
Dehghan-Nasiri, M., et al. (2012). Biological and environmental monitoring of lead and exposure in the automobile industry. Iran Occupational Health, 8(4), 1–8.
Farrahi, J., et al. (2009). Psychometric properties of the Persian version of the Pittsburgh Sleep Quality Index addendum for PTSD (PSQI-A). Sleep and Breathing, 13(3), 259.
Flynn, M. R., & Susi, P. (2009). Neurological risks associated with manganese exposure from welding operations–a literature review. International Journal of Hygiene and Environmental Health, 212(5), 459–469.
Ghotbi, M. R., et al. (2013). Changes in urinary catecholamines in response to noise exposure in workers at Sarcheshmeh Copper Complex, Kerman, Iran. Environmental Monitoring and Assessment, 185(11), 8809–8814.
Golpayegani, A., & Khanjani, N. (2012). Occupational and environmental exposure to lead in Iran: a systematic review. Journal of Health and Development, 1(1), 74–89.
Golter, M., & Michaelson, I. A. (1975). Growth, behavior, and brain catecholamines in lead-exposed neonatal rats: a reappraisal. Science, 187(4174), 359–361.
Gump, B. B., et al. (2008). Low-level prenatal and postnatal blood lead exposure and adrenocortical responses to acute stress in children. Environmental Health Perspectives, 116(2), 249.
Haas, H. L., & Konnerth, A. (1983). Histamine and noradrenaline decrease calcium-activated potassium conductance in hippocampal pyramidal cells. Nature, 302(5907), 432.
Hashemi Nejad, N., et al. (2013). Survey of relationship between mental health and job stress among midwives who were working in hospitals of Kerman, Iran, 2011. The Iranian journal of Obstetrics, Gynecology and Infertility, 16(64), 1–9.
Hayatbakhsh, M. M., et al. (2017). Lead poisoning among opium users in Iran: an emerging health hazard. Substance Abuse Treatment, Prevention, and Policy, 12(1), 43.
Hussain, I. (2006). Investigation of heavy metals Cu, Pb, Cd, Mn, Cr, Fe and Ni in Ammi visnaga. Chemical Society of Pakistan, 28(3), 241–245.
International Agency for Research on Cancer (IARC). (2006).Group authors from the World Heealth Organization. IARC Monographs on theevaluation of carcinogenic risks to humans. Lyon:2006, Retrieved fall, 2018, fromavailable: https://www.who.int/en/news-room/fact-sheets/detail/lead-poisoning-and-health.
Itani, O., et al. (2018). Sleep-related factors associated with industrial accidents among factory workers and sleep hygiene education intervention. Sleep and Biological Rhythms, 1–13.
Jacobs, B. L., & Azmitia, E. C. (1992). Structure and function of the brain serotonin system. Physiological Reviews, 72(1), 165–229.
Jacobs, B., et al. (2008). Serotonin and sleep: molecular, functional and clinical aspects (pp. 185–204). Switzerland: Birkhauser Verlag.
Khanjani, N., et al. (2018). Breast milk contamination with lead and cadmium and its related factors in Kerman, Iran. Journal of Environmental Health Science and Engineering, 16(2), 323–335.
Khorasani, G., et al. (2008). The comparison of lead and zinc plasma levels in gastric cancer patients with healthy volunteers. Research Journal of Biological Sciences, 3, 631–634.
Lima, P., et al. (2002). Sleep-wake pattern of medical students: early versus late class starting time. Brazilian Journal of Medical and Biological Research, 35(11), 1373–1377.
Mahurpawar, M. (2015). Effects of heavy metals on human health. International Journal of Research Granthaalayah, 1–7.
McGinty, D. T. (2009). Serotonin and sleep: Molecular, functional, and clinical aspects. Sleep, 32(5), 699.
McIntosh, M. J., et al. (1988). Influence of lead exposure on catecholamine metabolism in discrete rat brain nuclei. Comparative Biochemistry and Physiology. Part C, Comparative Pharmacology and Toxicology, 89(2), 211–213.
Mohammadyan, M., et al. (2019a). Investigation of occupational exposure to lead and its relation with blood lead levels in electrical solderers. Environmental Monitoring and Assessment, 191, 126.
Mohammadyan, M., et al. (2019b). Occupational exposure to styrene and its relation with urine mandelic acid, in plastic injection workers. Environmental Monitoring and Assessment, 191, 62.
Monk, T., & Folkard, S. (2005). Shifts; problems and approaches, Translation by Alireza Chobineh. Shiraz University of Medical Press.
Morris, C. J., et al. (2012). Circadian system, sleep and endocrinology. Molecular and Cellular Endocrinology, 349(1), 91–104.
Naghavi, M. (2001). Death in eighteen provinces of Iran. Annual Report of Iranian Ministry of Health and Medical Education, 127, 340–346.
National Institute for Occupational Safety and Health (NIOSH). (2003). Lead in blood and urine. Retrieved fall, 2018, from https://www.cdc.gov/niosh/docs/2003-154/pdfs/8003.pdf.
Occupational Safety and Health Administration (OSHA). (2006). Metal & metalloid particulates in workplace atmospheres(atomic absorption). Retrieved Winter 2018, from https://www.osha.gov/dts/sltc/methods/toc_l.html.
Parmalee, N. L., & Aschner, M. (2017). Metals and circadian rhythms. Advances in Neurotoxicology (Vol. 1, pp. 119–130). Elsevier.
Rahimi Moghadam, S., et al. (2017a). Decline in lung function among cement production workers: a meta-analysis. Reviews on Environmental Health, 32(4), 333–341.
Rahimi Moghadam, S., et al. (2017b). Shift work problems of healthcare workers at Kerman University of Medical Sciences, Iran, 2013. Journal of Occupational Health and Epidemiology, 6(4), 207–214.
Roodbandi, A. S. J., et al. (2017). Sleep quality and sleepiness: a comparison between nurses with and without shift work, and university employees. International Journal of Occupational Hygiene, 8(4), 230–236.
Schober, S. E., et al. (2006). Blood lead levels and death from all causes, cardiovascular disease, and cancer: results from the NHANES III mortality study. Environmental Health Perspectives, 114(10), 1538.
Shahtaheri, S., & Afshari, D. (2007). Occupational toxicology (pp. 237–243). Tehran: Baraye Farda Publication.
Wilhelm, M., et al. (2010). Reassessment of critical lead effects by the German Human Biomonitoring Commission results in suspension of the human biomonitoring values (HBM I and HBM II) for lead in blood of children and adults. International Journal of Hygiene and Environmental Health, 213(4), 265–269.
World Health Organisation. (1995). Biological indices of lead exposure and body burden. In: IPCS, Inorganic lead, Environmental Health Criteria 118, Geneva: WHO 165:114–18.
Acknowledgements
The authors thank Dr. Abedi, PhD in Analytical Chemistry and the Simorgh Pharmaceutical Industry which helped us prepare and analyze the samples.
Funding
This study was conducted with the financial support of Mazandaran University of Medical Sciences and Neyshabur University of Medical Sciences, and by grant number 3036-96.
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Mohammadyan, M., Moosazadeh, M., Borji, A. et al. Exposure to lead and its effect on sleep quality and digestive problems in soldering workers. Environ Monit Assess 191, 184 (2019). https://doi.org/10.1007/s10661-019-7298-2
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DOI: https://doi.org/10.1007/s10661-019-7298-2