Occupational risk for laryngeal cancer / "Riscos ocupacionais para o câncer de laringe: um estudo caso-controle"

AUTOR(ES)

Sergio Guerra Sartor

DATA DE PUBLICAÇÃO

2003

RESUMO

Laryngeal cancer comprises 3,1% of the new cases of cancer in men in the world, representing the tenth most common malign neoplasm for males. In São Paulo City, 169 new cases of laryngeal cancer were reported in 1970, representing 25,5/100.000 and 299 cases in 1985, increasing the rate to 37,6/100.000 (both for males, age standardized truncated rate, 30-74 years). The best established risk factors for laryngeal cancer are tobacco and alcohol. In respect to occupational factors, the only established carcinogen is exposure to strong inorganic acid mists. However, asbestos, pesticides, paints, gasoline and diesel engine emissions, dusts, among other factors are reported in the literature as occupational agents that increase the risk of laryngeal cancer. A hospital-based case-control study was conducted, in seven hospitals in São Paulo, to investigate occupational risk factors for laryngeal cancer. The study included 122 laryngeal cancers and 187 controls, selected by frequency matching on sex and age. Detailed information on smoking, alcohol consumption, and occupational history was collected. Occupational hygienists assessed the exposure to 49 agents. Odds Ratios (OR) and 95% confidence intervals (95% CI) were estimated by unconditional logistic regression, and were adjusted for sex, age, smoking and alcohol. Laryngeal cancer was associated with exposure to respirable free crystalline silica (OR 1,83, 95% CI 1,00 - 3,36), soot (from coal, coke, fuel oil, wood) (OR 1,78, 95% CI 1,03 - 3,03), fumes (OR 2,55, CI 95% 1,14 - 5,67) and to live animals (OR 1,80, 95% CI 1,02 - 3,19). This study showed that occupational exposures to: respirable free crystalline silica, soot (from coal, coke, fuel oil, wood), fumes and live animals are risk factors for laryngeal cancer.

ASSUNTO(S)

laringe occupational exposure neoplasias larÍngeas/epidemiologia larynx occupational risk laryngeal neoplasms/epidemiology riscos ocupacionais exposiÇÃo ocupacional

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