Skip to Main Content

An official website of the United States government

Government Funding Lapse

Because of a lapse in government funding, the information on this website may not be up to date, transactions submitted via the website may not be processed, and the agency may not be able to respond to inquiries until appropriations are enacted. The NIH Clinical Center (the research hospital of NIH) is open. For more details about its operating status, please visit  cc.nih.gov. Updates regarding government operating status and resumption of normal operations can be found at OPM.gov.

Learn About PLCO

This describes the trial, explaining how and what data was collected. The main findings of the study can be found here.

  • Trial Summary
    This describes the history, organization and overview of the study's protocol.
  • Data Collected
    This includes details of protocols for questionnaires, screening, and ascertainment of cancer and mortality data.
  • Data Tables
    This page shows how many cancers are available on this website for multiple cohorts.
  • Biospecimens Collected
    This describes the biospecimens collected from the PLCO trial.
  • Biospecimen Tables
    You may check the availability of different types of PLCO biospecimens.
  • Main Findings
    This page lists a collection of 14 trial publications summarizing the recruitment and outcomes of the study.