A Prospective Cohort Study of Occupational Exposures and Cancer Risk Among Women

Breast Cancer Clinical Trial

Official title:

A Prospective Cohort Study of Occupational Exposures and Cancer Risk Among Women

Clinical Trial Details — Status: Completed

Administrative data

• NCT number: NCT00342004
• Other study ID #: 999998006
• Secondary ID: OH98-C-N006
• Status: Completed
• Start date: May 1, 1997
• Est. completion date: July 28, 2020

Study information

• Verified date: July 2020
• Source: National Institutes of Health Clinical Center (CC)
• Contact: n/a
• Is FDA regulated: No
• Study type: Observational

Clinical Trial Summary

A prospective cohort study is proposed to evaluate occupational and environmental risk factors for cancer among women in Shanghai, China. Approximately 75,000 women aged 40-69 who reside in eight geographically defined communities in two urban districts of Shanghai will be recruited via a community-based cancer education program. All eligible subjects will be invited by local health workers from the neighborhood health station to the clinic for an interview and selected anthropometric measurements. The interview will elicit information on demographic background, diet, lifestyle factors, medical history, lifetime occupational history and residential history for the past 20 years. In addition, the women will be asked for information on their husbands' current and usual occupations, and demographic and a few other exposure factors. A spot urine sample and 10 ml of blood will be collected from all cohort members and stored at -70 degrees C for future assays of urine metabolites and DNA and hemoglobin adducts of selected occupational and environmental carcinogens, and polymorphic genes encoding enzymes that are involved in metabolism of relevant carcinogens. Cohort members and their husbands will be followed for cancer outcomes through biennial recontact and linkage with files of the population-based Shanghai Cancer Registry, of the Shanghai Vital Statistics, and of the Shanghai Resident Registry. Medical records and pathology slides will be reviewed for all cancer cases to verify their diagnosis. Post-diagnostic blood samples will be obtained from all cohort members diagnosed with cancer during the follow-up period and stored for future methodologic and etiologic studies. The proposed initial study period is 5 years, with an average follow-up of about 3.5 years. We anticipate, however, that follow-up will continue for 10 years or more.

Description:

A prospective cohort study is proposed to evaluate occupational and environmental risk factors for cancer among women in Shanghai, China. Approximately 75,000 women aged 40-69 who reside in eight geographically defined communities in two urban districts of Shanghai will be recruited via a community-based cancer education program. All eligible subjects will be invited by local health workers from the neighborhood health station to the clinic for an interview and selected anthropometric measurements. The interview will elicit information on demographic background, diet, lifestyle factors, medical history, lifetime occupational history and residential history for the past 20 years. In addition, the women will be asked for information on their husbands' current and usual occupations, and demographic and a few other exposure factors. A spot urine sample and 10 ml of blood will be collected from all cohort members. Among participants who did not provide a blood sample, a buccal cell sample will be collected. All biological samples will be stored at -70 degrees C for future assays of genetic polymorphisms, urine metabolites and DNA and hemoglobin adducts of selected occupational and environmental carcinogenACs. Cohort members and their husbands will be followed for cancer outcomes through annual recontact and linkage with files of the population-based Shanghai Cancer Registry, of the Shanghai Vital Statistics, and of the Shanghai Resident Registry. Medical records and pathology slides will be reviewed for all cancer cases to verify their diagnosis. Post-diagnostic blood samples will be obtained from all cohort members diagnosed with cancer during the follow-up period and stored for future methodologic and etiologic studies. The proposed initial study period is 5 years, with an average follow-up of about 3.5 years. We anticipate, however, that follow-up will continue for 10 years or more.

Recruitment information / eligibility

• Status: Completed
• Enrollment: 75366
• Est. completion date: July 28, 2020
• Est. primary completion date: July 28, 2020
• Accepts healthy volunteers: No
• Gender: Female
• Age group: 40 Years to 70 Years

Eligibility

• INCLUSION CRITERIA:

Women aged 40-69 who are permanent residents in eight geographically defined communities of urban Shanghai.

Related Conditions & MeSH terms

• Brain Cancer
• Brain Neoplasms
• Breast Cancer
• Lung Cancer
• Non-Hodgkin Lymphoma
• Stomach Cancer
• Stomach Neoplasms

Locations

Country	Name	City	State
China	Shanghai Cancer Institute	Shanghai

Sponsors (1)

Lead Sponsor	Collaborator
National Cancer Institute (NCI)

Country where clinical trial is conducted

China, 

References & Publications (3)

Cantor KP, Stewart PA, Brinton LA, Dosemeci M. Occupational exposures and female breast cancer mortality in the United States. J Occup Environ Med. 1995 Mar;37(3):336-48. — View Citation

Chow WH, Dosemeci M, Zheng W, Vetter R, McLaughlin JK, Gao YT, Blot WJ. Physical activity and occupational risk of colon cancer in Shanghai, China. Int J Epidemiol. 1993 Feb;22(1):23-9. — View Citation

Chow WH, Ji BT, Dosemeci M, McLaughlin JK, Gao YT, Fraumeni JF Jr. Biliary tract cancers among textile and other workers in Shanghai, China. Am J Ind Med. 1996 Jul;30(1):36-40. — View Citation

Outcome

Type	Measure	Description	Time frame	Safety issue
Primary	All cancer incidence	Any cancer incidence, selected chronic diseases and all causemortality	up to 30 years
Secondary	All deaths	All cause deaths	up to 30 years