Exposure assessment and modeling of quartz in Swedish iron foundries for a nested case-control study on lung cancer

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Andersson, LenaDepartment of Occupational and Environmental Medicine, Örebro University Hospital, Örebro, Sweden; Man-Technology-Environment Research Centre (MTM), Department of Science, Örebro University, Örebro, Sweden (författare)

Exposure assessment and modeling of quartz in Swedish iron foundries for a nested case-control study on lung cancer

Artikel/kapitelEngelska2012

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Philadelphia :Taylor & Francis,2012
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LIBRIS-ID:oai:DiVA.org:oru-21293
https://urn.kb.se/resolve?urn=urn:nbn:se:oru:diva-21293URI
https://doi.org/10.1080/15459624.2011.645397DOI

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Språk:engelska
Sammanfattning på:engelska

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Funding Abency:AFA, Stockholm
Exposure assessment of quartz in Swedish iron foundries was performed based on historical and present measurement data. To evaluate the exposure response relationship between quartz exposure and lung cancer, we modeled quartz exposure from our database of measurements using determinants job title, time period and company. Based on these modeled exposure data, we conducted a nested case– control evaluation.In our database, the overall individual daily time-weighted average (TWA) quartz concentrations of current and historical data varied between 0.0018 and 4.9 mg/m3, averaging 0.083 mg/m3. The job titles with mean TWAs for the whole study period exceeding the European Union recommended occupational exposure limit of 0.05 mg/m3 were fettlers (0.087 mg/m3), furnace and ladle repair (0.42 mg/m3) and maintenance (0.054 mg/m3) workers.The mixed model analysis demonstrated significant determinants on the job level for furnace and ladle repair (β=4.06; 95% CI 2.78-5.93). For all jobs significantly higher exposure levels occurred only during the first time period, 1968-1979 (β=2.08; 95% CI 1.75-2.47), and a decreasing but not significant trend was noted for the three following 10 year time periods up to 2006 (β=1.0, 0.96 and 1, respectively). Two iron foundries had significantly higher quartz concentration levels than the others (β=1.31; 95% CI 1.00-1.71 and β=1.63; 95% CI 1.00-2.65, respectively). The individual cumulative quartz exposure measures were categorized in low, medium and high exposure (0.5-<1, 1-1.9 and ≥2 mg/m3 *years, respectively).In the nested case-control analysis, we found the highest odds ratios of lung cancer (OR 1.17; 95% CI 0.53-2.55) for the medium exposure group. No dose– response trend or significantly increased risk was determined for our high exposed group (≥2 mg/m3), representing 40 years of exposure at >0.05 mg/m3 of quartz. To conclude, certain foundry workers are still exposed to high levels of quartz, but an increased risk of lung cancer caused by quartz exposure in these Swedish iron foundries could not be confirmed at our exposure levels.

Ämnesord och genrebeteckningar

MEDICIN OCH HÄLSOVETENSKAP Hälsovetenskap Arbetsmedicin och miljömedicin hsv//swe
MEDICAL AND HEALTH SCIENCES Health Sciences Occupational Health and Environmental Health hsv//eng
Exposure modeling
iron foundry
lung cancer
quartz
Occupational and Environmental Medicine
Arbets- och miljömedicin

Biuppslag (personer, institutioner, konferenser, titlar ...)

Bryngelsson, Ing-LissDepartment of Occupational and Environmental Medicine, Örebro University Hospital, Örebro, Sweden (författare)
Ngo, YenSwedish Institute for Infectious Disease Control, Solna, Sweden (författare)
Ohlson, Carl-Göran,1942-Örebro universitet,Institutionen för hälsovetenskap och medicin,Department of Clinical Medicines, Örebro University, Örebro, Sweden; Department of Occupational and Environmental Medicine, Örebro University Hospital, Örebro, Sweden(Swepub:oru)cnon (författare)
Westberg, Håkan,1949-Örebro universitet,Institutionen för naturvetenskap och teknik,Department of Occupational and Environmental Medicine, Örebro University Hospital, Örebro, Sweden(Swepub:oru)hwg (författare)
Department of Occupational and Environmental Medicine, Örebro University Hospital, Örebro, Sweden; Man-Technology-Environment Research Centre (MTM), Department of Science, Örebro University, Örebro, SwedenDepartment of Occupational and Environmental Medicine, Örebro University Hospital, Örebro, Sweden (creator_code:org_t)

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Ingår i:Journal of Occupational and Environmental HygienePhiladelphia : Taylor & Francis9:2, s. 110-1191545-96241545-9632

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Av författaren/redakt...: Andersson, Lena; Bryngelsson, Ing ...; Ngo, Yen; Ohlson, Carl-Gör ...; Westberg, Håkan, ...

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