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Hosseini B, Zendehdel K, Bouaoun L, Hall AL, Rashidian H, Hadji M, Gholipour M, Haghdoost AA, Schüz J, Olsson A. Bladder cancer risk in relation to occupations held in a nationwide case-control study in Iran. Int J Cancer 2023; 153:765-774. [PMID: 37158123 DOI: 10.1002/ijc.34560] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2023] [Revised: 04/14/2023] [Accepted: 04/19/2023] [Indexed: 05/10/2023]
Abstract
Globally, bladder cancer has been identified as one of the most frequent occupational cancers, but our understanding of occupational bladder cancer risk in Iran is less advanced. This study aimed to assess the risk of bladder cancer in relation to occupation in Iran. We used the IROPICAN case-control study data including 717 incident cases and 3477 controls. We assessed the risk of bladder cancer in relation to ever working in major groups of the International Standard Classification of Occupations (ISCO-68) while controlling for cigarette smoking, opium consumption. Logistic regression models were used to estimate odds ratios (ORs) and 95% confidence intervals (CI). In men, decreased ORs for bladder cancer were observed in administrative and managerial workers (OR 0.4; CI: 0.2, 0.9), and clerks (OR 0.6; CI: 0.4, 0.9). Elevated ORs were observed in metal processors (OR 5.4; CI: 1.3, 23.4), and workers in occupations with likely exposure to aromatic amines (OR 2.2; CI: 1.2, 4.0). There was no evidence of interactions between working in aromatic amines-exposed occupations and tobacco smoking or opium use. Elevated risk of bladder cancer in men in metal processors and workers likely exposed to aromatic amines aligns with associations observed outside Iran. Other previously confirmed associations between high-risk occupations and bladder cancer were not observed, possibly due to small numbers or lack of details on exposure. Future epidemiological studies in Iran would benefit from the development of exposure assessment tools such as job exposure matrices, generally applicable for retrospective exposure assessment in epidemiological studies.
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Affiliation(s)
- Bayan Hosseini
- Environment and Lifestyle Epidemiology Branch, International Agency for Research on Cancer, World Health Organization, Lyon, France
- Cancer Research Centre, Cancer Institute of Iran, Tehran University of Medical Sciences, Tehran, Iran
| | - Kazem Zendehdel
- Cancer Research Centre, Cancer Institute of Iran, Tehran University of Medical Sciences, Tehran, Iran
- Cancer Biology Research Centre, Cancer Institute of Iran, Tehran University of Medical Sciences, Tehran, Iran
| | - Liacine Bouaoun
- Environment and Lifestyle Epidemiology Branch, International Agency for Research on Cancer, World Health Organization, Lyon, France
| | - Amy L Hall
- Research Directorate, Veterans Affairs Canada, Charlottetown, Prince Edward Island, Canada
| | - Hamideh Rashidian
- Cancer Research Centre, Cancer Institute of Iran, Tehran University of Medical Sciences, Tehran, Iran
| | - Maryam Hadji
- Cancer Research Centre, Cancer Institute of Iran, Tehran University of Medical Sciences, Tehran, Iran
- Health Sciences Unit, Faculty of Social Sciences, Tampere University, Tampere, Finland
| | - Mahin Gholipour
- Metabolic Disorders Research Centre, Golestan University of Medical Sciences, Gorgan, Iran
| | - Ali Akbar Haghdoost
- Social Determinants of Health Research Centre, Institute for Futures Studies in Health, Kerman University of Medical Sciences, Kerman, Iran
- Regional Knowledge HUB for HIV/AIDS Surveillance, Research Centre for Modelling in Health, Institute for Future Studies in Health, Kerman University of Medical Sciences, Kerman, Iran
| | - Joachim Schüz
- Environment and Lifestyle Epidemiology Branch, International Agency for Research on Cancer, World Health Organization, Lyon, France
| | - Ann Olsson
- Environment and Lifestyle Epidemiology Branch, International Agency for Research on Cancer, World Health Organization, Lyon, France
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Risk Factors Involved in the High Incidence of Bladder Cancer in an Industrialized Area in North-Eastern Spain: A Case-Control Study. J Clin Med 2023; 12:jcm12020728. [PMID: 36675657 PMCID: PMC9867509 DOI: 10.3390/jcm12020728] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2022] [Revised: 01/09/2023] [Accepted: 01/13/2023] [Indexed: 01/19/2023] Open
Abstract
Bladder cancer (BC) is the most common of the malignancies affecting the urinary tract. Smoking and exposure to occupational and environmental carcinogens are responsible for most cases. Vallès Occidental is a highly industrialized area in north-eastern Spain with one of the highest incidences of BC in men. We carried out a case-control study in order to identify the specific risk factors involved in this area. Three hundred and six participants were included (153 cases BC and 153 controls matched for age and sex): in each group, 89.5% (n = 137) were male and the mean age was 71 years (range 30-91; SD = 10.6). There were no differences between groups in family history, body mass index, or dietary habits. Independent risk factors for CV were smoking (OR 2.08; 95% CI 1.30-3.32; p = 0.002), the use of analgesics in nonsmokers (OR 10.00; 95% CI 1.28-78.12; p = 0.028), and profession (OR: 8.63; 95% CI 1.04-71.94; p = 0.046). The consumption of black and blond tobacco, the use of analgesics in nonsmokers, and occupational exposures are risk factors for the development of BC in this area, despite the reduction in smoking in the population and the extensive measures taken in the last few decades in major industries to prevent exposure to occupational carcinogens.
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He L, Michailidou F, Gahlon HL, Zeng W. Hair Dye Ingredients and Potential Health Risks from Exposure to Hair Dyeing. Chem Res Toxicol 2022; 35:901-915. [PMID: 35666914 PMCID: PMC9214764 DOI: 10.1021/acs.chemrestox.1c00427] [Citation(s) in RCA: 21] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Given the worldwide popularity of hair dyeing, there is an urgent need to understand the toxicities and risks associated with exposure to chemicals found in hair dye formulations. Hair dyes are categorized as oxidative and nonoxidative in terms of their chemical composition and ingredients. For several decades, the expert panel's Cosmetic Ingredient Review (CIR) has assessed the safety of many of the chemicals used in hair dyes; however, a comprehensive review of hair dye ingredients and the risk of exposure to hair dyeing has not been documented. Herein, we review the safety of the various chemicals in oxidative and nonoxidative hair dyes, toxicities associated with hair dyeing, and the carcinogenic risks related to hair dyeing. While many compounds are considered safe for users at the concentrations in hair dyes, there are conflicting data about a large number of hair dye formulations. The CIR expert panel has ratified a number of coloring ingredients for hair dyes and banned a series of chemicals as carcinogenic to animals and unsafe for this application. The use of these chemicals as raw materials for producing hair dyes may result in the synthesis of other contaminants with potential toxicities and increased risk of carcinogenesis. It is an open question whether personal or occupational hair dyeing increases the risk of cancer; however, in specific subpopulations, a positive association between hair dye use and cancer occurrence has been reported. To address this question, a better understanding of the chemical and mechanistic basis of the reported toxicities of hair dye mixtures and individual hair dye ingredients is needed. It is anticipated that in-depth chemical and systems toxicology studies harnessing modern and emerging techniques can shed light on this public health concern in the future.
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Affiliation(s)
- Lin He
- Cancer Centre, Faculty of Health Sciences, University of Macau, Macau 999078, SAR, China
| | - Freideriki Michailidou
- Department of Health Sciences and Technology, ETH Zürich, Schmelzbergstrasse 9, 8092 Zürich, Switzerland.,Collegium Helveticum, Institute for Advanced Studies (IAS) of the University of Zurich, ETH Zurich and Zurich University of the Arts, Schmelzbergstrasse 25, 8092 Zürich, Switzerland
| | - Hailey L Gahlon
- Department of Health Sciences and Technology, ETH Zürich, Schmelzbergstrasse 9, 8092 Zürich, Switzerland
| | - Weibin Zeng
- College of Animal Science and Technology, Shihezi University, Shihezi 832003, Xinjiang, China
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Hosseini B, Hall AL, Zendehdel K, Kromhout H, Onyije FM, Moradzadeh R, Zamanian M, Schüz J, Olsson A. Occupational Exposure to Carcinogens and Occupational Epidemiological Cancer Studies in Iran: A Review. Cancers (Basel) 2021; 13:3581. [PMID: 34298794 PMCID: PMC8305339 DOI: 10.3390/cancers13143581] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2021] [Revised: 07/13/2021] [Accepted: 07/15/2021] [Indexed: 01/09/2023] Open
Abstract
INTRODUCTION The extent of exposure to occupational carcinogens is not well characterized in Iran, and little is known about the burden of occupational cancer. OBJECTIVES This study aimed to describe exposure to occupational carcinogens and occupational epidemiology studies in Iran. METHODS Relevant studies up to January 2021 in Iran were identified through three databases (PubMed, Web of Science, and Google Scholar). RESULTS Forty-nine publications from 2009 to 2020 (one cohort, 11 case-control, 34 exposure monitoring studies, and three cancer burden studies) were included. The exposure monitoring studies were conducted mainly in the petroleum industry, metal industry, manufacturing of electronics, manufacturing of plastics, construction industry, and service industry. A few of the case-control studies also reported increased risk of cancers in relation to work in those industries. CONCLUSIONS Occupational cancer epidemiology in Iran is at an early stage. Both epidemiological and exposure monitoring studies are generally limited in size to provide robust evidence of occupational cancer risks. A coherent strategy to estimate the occupational cancer burden in Iran should start with conducting epidemiological studies along with systematic monitoring of occupational carcinogens for use in hazard control and research.
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Affiliation(s)
- Bayan Hosseini
- Environment and Lifestyle Epidemiology Branch, International Agency for Research on Cancer (IARC/WHO), CEDEX 08, 69372 Lyon, France; (B.H.); (F.M.O.); (J.S.)
- Cancer Research Center, Cancer Institute of Iran, Tehran University of Medical Sciences, Tehran 1419733141, Iran;
| | - Amy L. Hall
- Government of Canada, Charlottetown, PE C1A 1N3, Canada;
| | - Kazem Zendehdel
- Cancer Research Center, Cancer Institute of Iran, Tehran University of Medical Sciences, Tehran 1419733141, Iran;
| | - Hans Kromhout
- Institute for Risk Assessment Sciences, Utrecht University, 3584 CL Utrecht, The Netherlands;
| | - Felix M. Onyije
- Environment and Lifestyle Epidemiology Branch, International Agency for Research on Cancer (IARC/WHO), CEDEX 08, 69372 Lyon, France; (B.H.); (F.M.O.); (J.S.)
| | - Rahmatollah Moradzadeh
- Department of Epidemiology, School of Public Health, Arak University of Medical Sciences, Arak 3819693345, Iran; (R.M.); (M.Z.)
| | - Maryam Zamanian
- Department of Epidemiology, School of Public Health, Arak University of Medical Sciences, Arak 3819693345, Iran; (R.M.); (M.Z.)
| | - Joachim Schüz
- Environment and Lifestyle Epidemiology Branch, International Agency for Research on Cancer (IARC/WHO), CEDEX 08, 69372 Lyon, France; (B.H.); (F.M.O.); (J.S.)
| | - Ann Olsson
- Environment and Lifestyle Epidemiology Branch, International Agency for Research on Cancer (IARC/WHO), CEDEX 08, 69372 Lyon, France; (B.H.); (F.M.O.); (J.S.)
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Kalan Farmanfarma K, Mahdavifar N, Salehiniya H. Bladder Cancer in Iran: An Epidemiological Review. Res Rep Urol 2020; 12:91-103. [PMID: 32185152 PMCID: PMC7062394 DOI: 10.2147/rru.s232417] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2019] [Accepted: 01/06/2020] [Indexed: 12/23/2022] Open
Abstract
PURPOSE Bladder cancer is the sixth most common cancer in Iran. Information about the epidemiological situation of the disease and its risk factors is necessary for conducting a planning program to reduce the disease. This study is conducted with the aim of evaluating the epidemiological features of bladder cancer in Iran. METHODS This is a systematic review of the published articles in both Persian and English in international and national journals during the years 2000-2019 with key words of Iran and bladder cancer. Articles were selected from the national information database (SID, Magiran) and international databases (PubMed, Scopus, and Web of Science). Articles related to the epidemiological aspects of the disease, including incidence, prevalence, mortality, and risk factors, were evaluated. RESULTS The incidence rate of bladder cancer was about 1.6-115; cumulative survival rate was 0.95, mortality rate was 0.5-0.84 and its prevalence in the Iranian population was between 4.10% and 12.8%. The risk of developing malignancy in major risk factor groups, including smoking and opium, was 6.2 (2.04-18.7), increases in protein and animal fat consumption were about 5- and 19-times higher than in the general population, respectively. In terms of occupational exposure, bus and heavy truck drivers were 11.3 (1.3-92.05) more at risk than others. CONCLUSION Regarding the increasing trend of this disease, changes in lifestyle to reduce risk factors can be effective in decreasing the incidence and mortality rate of this malignancy.
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Affiliation(s)
- Khadijeh Kalan Farmanfarma
- Department of Epidemiology, Health Promotion Research Center, Zahedan University of Medical Sciences, Zahedan, Iran
| | - Neda Mahdavifar
- Department of Biostatistics and Epidemiology, School of Health, Non-Communicable Diseases Research Center, Sabzevar University of Medical Sciences, Sabzevar, Iran
| | - Hamid Salehiniya
- Social Determinants of Health Research Center, Birjand University of Medical Sciences, Birjand, Iran
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