Alpha-Tocopherol, Beta-Carotene Cancer Prevention (ATBC) Study

September 4, 2020 updated by: National Cancer Institute (NCI)

Alpha-Tocopherol, Beta-Carotene Cancer Prevention Study (ATBC Study) Population

The project is a passive follow-up of the Alpha-Tocopherol, Beta-Carotene Cancer Prevention (ATBC) Study cohort. Originally, this was a large, randomized, double-blind, placebo-controlled, 2x2 factorial primary prevention trial testing the effects of alpha-tocopherol and beta-carotene supplementation on cancer incidence and mortality. The study was conducted in Finland as a collaboration between the U.S. National Cancer Institute (NCI) and the National Public Health Institute of Finland. NCI has maintained passive surveillance of the cohort through Finnish national registries, including the cancer registry.

The primary purpose of the ATBC cohort follow-up is to use the existing risk factor data and biological specimens (i.e., serum, whole blood, DNA, red blood cells, and toenails) to test hypotheses relevant to cancer etiology, survival, early detection, and prevention. These data and biospecimens continue to provide an invaluable resource for the study of biochemical, nutritional, genetic, and molecular hypotheses. These analyses are made all the more informative and powerful by the addition of cases identified annually during the follow-up period, and the research benefits from a longer pre-diagnosis period (now over 30 years).

Study Overview

Status

Completed

Conditions

Detailed Description

The ATBC study was a randomized, double-blind, placebo-controlled, primary prevention trial to determine whether daily supplementation with a-tocopherol, beta-carotene, or both would reduce the incidence of lung or other cancers among male smokers. Between 1985 and 1988, 29,133 men ages 50 to 69 years, who smoked at least five cigarettes per day, were recruited from southwestern Finland. Participants were randomly assigned to receive either a-tocopherol as dl-a-tocopheryl acetate (50 mg/day), beta-carotene as all-trans-beta-carotene (20 mg/day), both supplements, or placebo capsules for 5-8 years (median 6.1 years) through April 30, 1993. Post-intervention follow-up has continued through the Finnish Cancer Registry and other national registries, and epidemiological analyses continue to be conducted.

Study Type

Observational

Enrollment (Actual)

29133

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Locations

  • Finland
      • Helsinki, Finland
        • National Institute of Health and Welfare, Helsinki, Finland

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Ages Eligible for Study

50 years to 69 years (ADULT, OLDER_ADULT)

Accepts Healthy Volunteers

No

Genders Eligible for Study

Male

Sampling Method

Non-Probability Sample

Study Population

Male smokers in Southwestern Finland

Description

  • INCLUSION CRITERIA:

Current smokers (five or more cigarettes per day at study entry) from Southwestern Finland.

EXCLUSION CRITERIA:

  • Females
  • Proven malignancy (except nonmelanoma skin cancer or cancer in situ)
  • Severe angina pectoris
  • Chronic renal insufficiency
  • Cirrhosis of the liver
  • Chronic alcoholism
  • Anticoagulant therapy
  • Use of supplements containing vitamin E greater than 20 mg/day, or vitaming A greater than 20,000 IU/day, or beta-carotene greater than 6 mg/day

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

Cohorts and Interventions

Group / Cohort
Healthy Volunteers
Male smokers in Southwestern Finland

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Measure Description
Time Frame
Cancer
Time Frame: Annually
Annual linkage with Finnish Cancer Registry
Annually

Secondary Outcome Measures

Outcome Measure
Time Frame
Causes of mortality
Time Frame: Anually
Anually

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

National Cancer Institute (NCI)

Collaborators

Finnish Institute for Health and Welfare

Investigators

  • Principal Investigator: Demetrius A Albanes, M.D., National Cancer Institute (NCI)

Publications and helpful links

The person responsible for entering information about the study voluntarily provides these publications. These may be about anything related to the study.

General Publications

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start (ACTUAL)

March 3, 1995

Primary Completion (ACTUAL)

September 4, 2020

Study Completion (ACTUAL)

September 4, 2020

Study Registration Dates

First Submitted

June 19, 2006

First Submitted That Met QC Criteria

June 19, 2006

First Posted (ESTIMATE)

June 21, 2006

Study Record Updates

Last Update Posted (ACTUAL)

September 9, 2020

Last Update Submitted That Met QC Criteria

September 4, 2020

Last Verified

September 1, 2020

More Information

Terms related to this study

Keywords

Additional Relevant MeSH Terms

Other Study ID Numbers

  • 999995012
  • OH95-C-N012

Drug and device information, study documents

Studies a U.S. FDA-regulated drug product

No

Studies a U.S. FDA-regulated device product

No

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

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