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Marie-Claude Rousseau

Publications and source records attributed to Marie-Claude Rousseau.

7 recordsLinked to original sources
PubMed2006

Exposure to diesel and gasoline engine emissions and the risk of lung cancer.

Pollution from motor vehicles constitutes a major environmental health problem. The present paper describes associations between diesel and gasoline engine emissions and lung cancer, as evidenced in a 1979-1985 population-based case-control study in Montreal, Canada. Cases were 857 male lung cancer patients. Controls were 533 population controls and 1,349 patients with other cancer types. Subjects were interviewed to obtain a detailed lifetime job history and relevant data on potential confounders. Industrial hygienists translated each job description into indices of exposure to several agents, including engine emissions. There was no evidence of excess risks of lung cancer with exposure to gasoline exhaust. For diesel engine emissions, results differed by control group. When cancer controls were considered, there was no excess risk. When population controls were studied, the odds ratios, after adjustments for potential confounders, were 1.2 (95% confidence interval: 0.8, 1.8) for any exposure and 1.6 (95% confidence interval: 0.9, 2.8) for substantial exposure. Confidence intervals between risk estimates derived from the two control groups overlapped considerably. These results provide some limited support for the hypothesis of an excess lung cancer risk due to diesel exhaust but no support for an increase in risk due to gasoline exhaust.

Adult↗
PubMed2006

Diabetes mellitus and cancer risk in a population-based case-control study among men from Montreal, Canada.

Diabetics may have a higher risk of cancer, notably liver and pancreatic cancers. Evidence about other cancer types remains sparse. The authors examined potential associations between diabetes and several types of cancer in a large multicancer case-control project carried out in Montreal, Canada, in the 1980s. This report, based on 3,107 male cancer cases and 509 population controls, uses information on diabetes and several covariates collected by interview. Adjusted odds ratios (ORs) and 95% confidence intervals (CI) were estimated for the associations between diabetes and each of 12 cancer types. Risks of pancreatic and liver cancers were increased among diabetics: adjusted ORs were 2.1 (95% CI: 1.0, 4.3) for pancreatic and 3.1 (95% CI: 1.1, 8.8) for liver cancer. The increased risk of pancreatic cancer was completely restricted to those with recent onset of diabetes; this was likely a manifestation of reverse causality. Conversely, the increased risk of liver cancer was independent of the interval between diabetes and cancer diagnoses. No associations were observed with melanoma, non-Hodgkin's lymphoma, cancers of the esophagus, stomach, colon, rectum, lung, prostate, bladder and kidney. In conclusion, diabetes was associated with an increased risk of liver cancer among men, but with no other cancer type including pancreatic cancer.

Adult↗
PubMed2004

Listing occupational carcinogens.

The occupational environment has been a most fruitful one for investigating the etiology of human cancer. Many recognized human carcinogens are occupational carcinogens. There is a large volume of epidemiologic and experimental data concerning cancer risks in different work environments. It is important to synthesize this information for both scientific and public health purposes. Various organizations and individuals have published lists of occupational carcinogens. However, such lists have been limited by unclear criteria for which recognized carcinogens should be considered occupational carcinogens, and by inconsistent and incomplete information on the occupations and industries in which the carcinogenic substances may be found and on their target sites of cancer. Based largely on the evaluations published by the International Agency for Research on Cancer, and augmented with additional information, the present article represents an attempt to summarize, in tabular form, current knowledge on occupational carcinogens, the occupations and industries in which they are found, and their target organs. We have considered 28 agents as definite occupational carcinogens, 27 agents as probable occupational carcinogens, and 113 agents as possible occupational carcinogens. These tables should be useful for regulatory or preventive purposes and for scientific purposes in research priority setting and in understanding carcinogenesis.

Carcinogens↗
PubMed2003

Occurrence of cervical infection with multiple human papillomavirus types is associated with age and cytologic abnormalities.

BACKGROUND: Few aspects of the occurrence of infections with multiple HPV types have been described. Since the immunity conferred by vaccines is type-specific, the epidemiology of such coinfections needs to be addressed. GOAL: The goal of the study was to document the prevalence and incidence of infection with multiple HPV types and the distribution of HPV types in coinfections. STUDY DESIGN: In a prospective cohort of 2075 Brazilian women, cervical specimens were collected for cytology and HPV detection. Information on potential risk factors was obtained by interview. RESULTS: The prevalence of HPV coinfections was 3% among cytologically normal women, 10% among women with ASCUS, 23% among those with LSIL, and 7% among those with HSIL. The incidence rate of coinfection declined markedly with age (Ptrend<0.001). Some HPV types co-occurred less frequently than expected, namely, HPV 16 and 18 occurring with other oncogenic HPV types and HPV 6/11. CONCLUSION: We have observed that occurrence of HPV coinfection was dependent both on age and on the presence of cytologic abnormalities. These results may have implications for vaccine development and for public health decisions about vaccination programs.

Adolescent↗
PubMed2003

Is colposcopy warranted in women with external anogenital warts?

OBJECTIVES.: To determine the prevalence of cervical dysplasia, diagnosed cytologically (squamous intraepithelial lesion [SIL]) or histologically (cervical intraepithelial neoplasia [CIN]), in women with external anogenital warts, and to determine the discriminating risk factors between those with and without cervical dysplasia. MATERIALS AND METHODS.: Chart review of women referred to colposcopy for external anogenital warts from 1990 to 1999. Human papillomavirus risk factors predictive for cervical dysplasia were assessed by logistic and Cox regression models. RESULTS.: There were 496 patients in this study. The prevalence of SIL by cytology was 20%: 18% low-grade squamous intraepithelial lesion and 2% high-grade squamous intraepithelial lesion. The combination of Pap smear and colposcopically directed biopsy identified dysplasia (SIL or CIN) in 30%, 4% of which were high-risk lesions (high-grade squamous intraepithelial lesion or CIN 2,3). Colposcopy performed much better than the Pap test alone in detecting CIN 2,3 lesions; 16 of 18 cases of CIN 2,3 diagnosed on biopsy had Pap smear results of low-grade squamous intraepithelial lesion or less, 7 of which were normal. Two thirds of those diagnosed with CIN 2,3 were aged 25 years and older. No differences in human papillomavirus infection risk factors were found between women with and without cervical dysplasia. CONCLUSIONS.: The high prevalence of CIN 2,3 in women with external anogenital warts warrants evaluation with colposcopy, particularly in women aged 25 years and older.

Journal Article↗
PubMed2003

Predictors of cervical coinfection with multiple human papillomavirus types.

Women infected with multiple human papillomavirus (HPV) types seem to be at higher risk of cervical intraepithelial neoplasia, although there is controversy about whether coinfections are associated with lower or higher grades of dysplasia. There is no established risk factor profile for infection with multiple HPV types. We analyzed data from a prospective cohort of 2,075 Brazilian women to identify determinants of HPV coinfection. Cervical specimens were collected for cytology and HPV DNA detection. Data on baseline and time-dependent putative risk factors were obtained by interview. Baseline predictors of HPV coinfection included younger age, greater number of recent sexual partners, a history of condyloma but not of other sexually transmitted diseases, and younger age at first sexual intercourse. In repeated measures analyses, there was a weak positive association between the number of sexual partners in the time interval between two study visits and the risk of coinfection. Our results suggest that the risk factor profile for HPV coinfection among HPV-infected women shares several similarities with risk factors for any HPV infection.

Adolescent↗