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Int J Cancer. 2017 Dec 15;141(12):2430-2436. doi: 10.1002/ijc.31015. Epub 2017 Sep 8.

Occupational exposure to wood dust and risk of nasal and nasopharyngeal cancer: A case-control study among men in four nordic countries-With an emphasis on nasal adenocarcinoma.

Author information

1
Faculty of Social Sciences, University of Tampere, Tampere, Finland.
2
Cancer Registry of Norway, Oslo, Norway.
3
Department of Epidemiology and Biostatistics, Karolinska Institutet, Stockholm, Sweden.
4
Icelandic Cancer Registry, Reykjavik, Iceland.
5
Faculty of Medicine, University of Iceland, Reykjavik, Iceland.
6
Cancer Registry of Norway, Institute of Population-Based Cancer Research, Oslo, Norway.
7
Department of Community Medicine, Faculty of Health Sciences, University of Tromsø, The Arctic University of Norway, Tromsø, Norway.
8
Department of Medical Epidemiology and Biostatistics, Karolinska Institutet, Stockholm, Sweden.
9
Genetic Epidemiology Group, Folkhälsan Research Center, Helsinki, Finland.
10
Director for Research, Finnish Cancer Registry-Institute for Statistical and Epidemiological Cancer Research, Unioninkatu 22, FI-00130 Helsinki, Finland.
11
Professor in Epidemiology, Faculty of Social Sciences, University of Tampere, Finland.

Abstract

The current study aims to provide stronger evidence to aid in our understanding of the role of cumulative occupational exposure to (softwood-dominated) mixed wood dust in aetiology of nasal cancer. We included broad exposure occurred in a range of wood-processing occupation across varied industries in four Nordic countries. A population-based case-control study was conducted on all male cases with nasal adenocarcinoma (393 cases), other types of nasal cancer (2,446) and nasopharyngeal cancer (1,747) diagnosed in Finland, Sweden, Norway and Iceland between 1961 and 2005. For each case, five male controls, who were alive at the time of diagnosis of the case (index date), were randomly selected, matched by birth-year and country. Cumulative exposures (CE)s to wood dust and formaldehyde before the index date were quantified based on a job-exposure matrix linked to occupational titles derived from population censuses. Hazard ratios (HRs) for the CE of wood dust were estimated by conditional logistic regression, adjusted for CE to formaldehyde and 95% confidence intervals (CIs) were calculated. There was an increasing risk of nasal adenocarcinoma related to wood dust exposure. The HR in the highest CE category of wood dust (≥ 28.82 mg/m3 -years) was 16.5 (95% CI 5.05-54.1). Neither nonadenocarcinoma of the nose nor nasopharyngeal cancer could be linked to wood dust exposure. CE to softwood-dominated mixed wood dusts is strongly linked with elevated risk in nasal adenocarcinoma but not with other types of nasal or nasopharyngeal cancer.

KEYWORDS:

nasal adenocarcinoma; nasal cancer; wood dust

PMID:
28840594
DOI:
10.1002/ijc.31015
[Indexed for MEDLINE]
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