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Prostate CarcinomaNCT00002540

Screening for Prostate Cancer in Older Patients (PLCO Screening Trial)

A study testing Laboratory Biomarker Analysis, Medical Examination Assessment and Screening Questionnaire Administration in people with Prostate Carcinoma, run by National Cancer Institute (NCI) at 1 site in United States.

Active, not recruiting

Under way, not looking for participants. Everyone needed has enrolled. The study is still running.

Official record
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Trial summary

This clinical trial studies whether screening methods used to diagnose cancer of the prostate, lung, colon, rectum, or ovaries can reduce deaths from these cancers. Screening tests may help doctors find cancer cells early and plan better treatment for prostate cancer. Read more about this study

Who is it for?
Ages 55 to 74 years, men only
Conditions the study is for
Prostate Carcinoma
What is being tested?
Laboratory Biomarker Analysis, Medical Examination Assessment and Screening Questionnaire Administration
Type of treatment
Surgery or procedure
Could I receive a placebo?
No, everyone receives an active treatment
How many people
76,685 participants
Where
1 siteUnited States
Study dates
16 Nov 1993to 30 Jun 2027
Phase
Interventional
Are there results?
Yes, posted in the registrySummary in the doctors' view

Key requirements

Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.

  • Ages 55 to 74 years
  • Men only
  • No healthy volunteers
  • Adult, Older adult

Who may be able to join

None listed.

Who cannot join

  • Men who at the time of randomization are less than 55 or greater than or equal to 75 years of age
  • Individuals undergoing treatment for cancer at this time, excluding basal-cell and squamous-cell skin cancer
  • Individuals with known prior cancer of the colon, rectum, lung, prostate
  • This includes primary or metastatic PLCO cancers
  • Individuals with previous surgical removal of the entire colon, one lung, or the entire prostate
  • Individuals who are participating in another cancer screening or cancer primary prevention trial
Show all 12Show fewer
  • Males who have taken Proscar/Propecia/finasteride in the past 6 months
  • NOTE: Individuals who are already enrolled in the trial when their physician prescribes finasteride are not prevented from taking this medication. As a result, these participants will continue to be screened and followed just as those participants who are not on finasteride.
  • NOTE: Men who are taking Tamoxifen are not excluded from any part of the PLCO Screening Trial.
  • Individuals who are unwilling or unable to sign the informed consent form
  • Males who have had more than one PSA blood test in the past three years
  • Individuals who have had a colonoscopy, sigmoidoscopy, or barium enema in the past three years

Trial locations and contacts

1 site in 1 country.

United States1 site
  • National Institutes of Health Clinical Center

    Bethesda, Maryland, 20892

Other trials in United States

About this study

Official title: Prostate, Lung, Colorectal, and Ovarian (PLCO) Cancer Screening Trial

This clinical trial studies whether screening methods used to diagnose cancer of the prostate, lung, colon, rectum, or ovaries can reduce deaths from these cancers. Screening tests may help doctors find cancer cells early and plan better treatment for prostate cancer.

Read the detailed description

PRIMARY OBJECTIVES:

  1. To determine whether screening with digital rectal examination (DRE) plus serum prostate-specific antigen (PSA) can reduce mortality from prostate cancer in men aged 55-74 at entry.

SECONDARY OBJECTIVES:

  1. To assess screening variables, other than mortality, for each of the interventions including sensitivity, specificity, and positive predictive value.

II. To assess the incidence, stage, and survival of cancer cases. III. To investigate the mortality predictive value of biologic and/or prognostic characterizations of tumor tissue as intermediate endpoints.

IV. To conduct biomolecular and genetic research into factors associated with cancer carcinogenesis and promotion, as well as the early detection of these factors.

OUTLINE: Participants in the overall PLCO study are stratified by screening center, gender, and age (55-59 vs 60-64 vs 65-69 vs 70-74). Participants are randomized to 1 of 2 arms (control vs screening).

ARM I (Control): Participants receive standard medical care. Participants complete a Diet History Questionnaire (DHQ) at baseline.

ARM II (Prostate Screening): Participants undergo blood sample collection for PSA analysis at baseline and annually for 5 years. Serum that is not used in the study will be stored in an NCI biorepository. Participants also undergo a DRE at baseline and annually for 3 years. A scheduling and tracking procedure is implemented to ensure regular attendance at repeat screens for participants screened negative or for those who are designated suspicious or positive at screening but for whom subsequent diagnostic procedures do not reveal prostate cancer (follow-up diagnostic procedures are through their own medical care environment). Participants diagnosed with prostate cancer via a screening test are referred for treatment in accordance with current accepted practice for appropriate stage of disease, patient age, and medical condition; a procedure is provided for contact with qualified medical personnel to insure appropriate therapy.

Participants complete a Dietary Questionnaire (DQX) at baseline and DHQ at year 3. An Annual Study Update (ADU) (previously referred to as the Periodic Survey of Health [PSH] questionnaire) is mailed to each participant annually for 13 years to identify all prevalent and incident prostate cancers as all deaths that occur among both screened and control subjects during the trial.

After completion of screening, participants are followed up for at least 13 years.

Being tested
Laboratory Biomarker Analysis, Medical Examination Assessment, Screening Questionnaire Administration
Medical subject headings
Prostatic Neoplasms

What participants receive

What participants receive. In a randomised study each person is assigned to one group by chance.

  • Laboratory Biomarker AnalysisOther

    Correlative studies

  • Medical Examination AssessmentProcedure or surgery

    Also called Exam, Examination, Health Assessment, Health Examination

    Undergo DRE

  • Screening Questionnaire AdministrationOther

    Undergo questionnaire assessments

Study groups in NCT00002540
Study groupRoleWhat they receive
ControlNo interventionParticipants receive standard medical care. Participants complete a DHQ at baseline.
Prostate ScreeningActive comparatorParticipants undergo blood sample collection for PSA analysis at baseline and annually for 5 years. Serum that is not used in the study will be stored in an NCI biorepository. Participants also undergo a DRE at baseline and annually for 3 years. Participants complete a DQX at baseline and DHQ at year 3. An ADU (previously referred to as the PSH questionnaire) is mailed to each participant annually for 13 years to identify all prevalent and incident prostate cancers as all deaths that occur among both screened and control subjects during the trial.
Receives: Other: Laboratory Biomarker Analysis; Procedure: Medical Examination Assessment; Other: Screening Questionnaire Administration

What is being measured

The primary outcome is the main question the study is designed to answer.

  1. Prostate Cancer Deaths

    Prostate cancer deaths confirmed in participants by a death review committee if available, otherwise by death certificate.

    Measured: Events through 13 years of follow-up or through December 31, 2009; median follow-up 12.0 years.

  2. Prostate Cancer Death Rates

    Prostate cancer deaths confirmed in participants by a death review committee if available, otherwise by death certificate. Rate is the number of deaths divided by person years of follow-up in the study.

    Measured: Events through 13 years of follow-up or through December 31, 2009; median follow-up 12.0 years.

Secondary outcomes (15)
  1. Deaths From All Causes

    Deaths from all causes were compared between the prostate cancer screening arm and the usual care arm.

    Measured: Events through 13 years of follow-up or through December 31, 2009.

  2. Death Rates From All Causes

    Deaths from all causes were compared between the prostate cancer screening arm and the usual care arm. Rate is the number of deaths divided by person years of follow-up in the study.

    Measured: Events through 13 years of follow-up or through December 31, 2009.

  3. Prostate Cancer Incidence

    Prostate cancer diagnoses confirmed by medical record abstraction. Incidence rate (cumulative) defined as prostate cancer diagnoses divided by person years at risk for prostate cancer.

    Measured: Events through 13 years of follow-up or through December 31, 2009; median follow-up 12.0 years.

  4. Prostate Cancer Incidence Rates

    Prostate cancer diagnoses confirmed by medical record abstraction. Incidence rate (cumulative) defined as prostate cancer diagnoses divided by person years at risk for prostate cancer.

    Measured: Events through 13 years of follow-up or through December 31, 2009; median follow-up 12.0 years.

  5. Complications of Diagnostic Evaluation (DE) Following a Positive Screening Test

    Number of positive screens with complications

    Measured: One year from screening examination

  6. T0 (Baseline) PSA Screening Results

    Prostate-Specific Antigen (PSA) result.

    Measured: T0 (at study entry)

  7. T0 (Baseline) DRE Screening Results

    Digital Rectal Examination (DRE) result.

    Measured: T0 (at study entry)

  8. T1 PSA Screening Results

    Prostate-Specific Antigen (PSA) result.

    Measured: T1 (one year after entry)

  9. T1 DRE Screening Results

    Digital Rectal Examination (DRE) result.

    Measured: T1 (one year after entry)

  10. T2 PSA Screening Results

    Prostate-Specific Antigen (PSA) result.

    Measured: T2 (two years after entry)

  11. T2 DRE Screening Results

    Digital Rectal Examination (DRE) results

    Measured: T2 (two years after entry)

  12. T3 PSA Screening Results

    Prostate-Specific Antigen (PSA) result

    Measured: T3 (three years after entry)

  13. T3 DRE Screening Results

    Digital Rectal examination (DRE) result

    Measured: T3 (three years after entry)

  14. T4 PSA Screening Result

    Prostate-Specific Antigen (PSA) result

    Measured: T4 (four years after entry)

  15. T5 PSA Screening Results

    Prostate-Specific Antigen (PSA) result.

    Measured: T5 (five years after entry)

Timeline

From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.

  1. First posted26 Mar 2004 (estimated)
  2. Study start16 Nov 1993
  3. Primary completion21 May 2012
  4. Study completion30 Jun 2027 (estimated)

Resources

More details

For doctors and researchers: how the study is designed, who runs it, and its registry IDs.

Study design
Study type
Interventional
Phase
Phase N/A
Primary purpose
Screening
Allocation
Randomised
Intervention model
Parallel groups
Masking
Single blind
Who is masked
Investigator
Enrolment
76,685 participants (actual)
IDs, dates and publications
ClinicalTrials.gov ID
NCT00002540
Sponsor's protocol ID
NCI-2012-01755
Other IDs
NCI-2012-01755, CDR0000078532, NCI-P93-0050, PLCO-1, PLCO-Prostate
Status last verified
Jul 2026
First submitted
1 Nov 1999
Last updated
24 Jul 2026

Publications

  • Malcomson FC, Shams-White MM, Reedy J, Huang WY, Moore SC, Loftfield E. Adherence to the 2018 World Cancer Research Fund/American Institute for Cancer Research Cancer Prevention Recommendations and risk of lifestyle-related cancers in the prostate, lung, colorectal, and ovarian cancer screening trial. BJC Rep. 2025 Nov 19;3(1):81. doi: 10.1038/s44276-025-00195-6.

    PubMed 41261199
  • Fan Z, Zhang Y, Yao Q, Liu X, Duan H, Liu Y, Sheng C, Lyu Z, Yang L, Song F, Huang Y, Song F. Effects of joint screening for prostate, lung, colorectal, and ovarian cancer - results from a controlled trial. Front Oncol. 2024 Apr 29;14:1322044. doi: 10.3389/fonc.2024.1322044. eCollection 2024.

    PubMed 38741776
  • Jiang Y, Xie Q, Chen R. Breast Cancer Incidence and Mortality in Relation to Hormone Replacement Therapy Use Among Postmenopausal Women: Results From a Prospective Cohort Study. Clin Breast Cancer. 2022 Feb;22(2):e206-e213. doi: 10.1016/j.clbc.2021.06.010. Epub 2021 Jun 26.

    PubMed 34548240
  • Pinsky PF, Durham D, Strassels S. Opioid and Other Medication Use and General Health Status in a Cohort of Older Adults. Gerontology. 2021;67(5):554-562. doi: 10.1159/000513731. Epub 2021 Mar 10.

    PubMed 33691305
  • Wang K, Wu Q, Li Z, Reger MK, Xiong Y, Zhong G, Li Q, Zhang X, Li H, Foukakis T, Xiang T, Zhang J, Ren G. Vitamin K intake and breast cancer incidence and death: results from a prospective cohort study. Clin Nutr. 2021 May;40(5):3370-3378. doi: 10.1016/j.clnu.2020.11.009. Epub 2020 Nov 16.

    PubMed 33277073
  • Pinsky PF, Miller EA, Zhu CS, Prorok PC. Overall mortality in men and women in the randomized Prostate, Lung, Colorectal, and Ovarian Cancer Screening Trial. J Med Screen. 2019 Sep;26(3):127-134. doi: 10.1177/0969141319839097. Epub 2019 Apr 3. No abstract available.

    PubMed 30943843
  • Pierre-Victor D, Pinsky PF. Association of Nonadherence to Cancer Screening Examinations With Mortality From Unrelated Causes: A Secondary Analysis of the PLCO Cancer Screening Trial. JAMA Intern Med. 2019 Feb 1;179(2):196-203. doi: 10.1001/jamainternmed.2018.5982.

    PubMed 30592477
  • Miller EA, Pinsky PF, Schoen RE, Prorok PC, Church TR. Effect of flexible sigmoidoscopy screening on colorectal cancer incidence and mortality: long-term follow-up of the randomised US PLCO cancer screening trial. Lancet Gastroenterol Hepatol. 2019 Feb;4(2):101-110. doi: 10.1016/S2468-1253(18)30358-3. Epub 2018 Nov 29.

    PubMed 30502933
  • Click B, Pinsky PF, Hickey T, Doroudi M, Schoen RE. Association of Colonoscopy Adenoma Findings With Long-term Colorectal Cancer Incidence. JAMA. 2018 May 15;319(19):2021-2031. doi: 10.1001/jama.2018.5809.

    PubMed 29800214
  • Schoen RE, Razzak A, Yu KJ, Berndt SI, Firl K, Riley TL, Pinsky PF. Incidence and mortality of colorectal cancer in individuals with a family history of colorectal cancer. Gastroenterology. 2015 Nov;149(6):1438-1445.e1. doi: 10.1053/j.gastro.2015.07.055. Epub 2015 Aug 5.

    PubMed 26255045
  • Guertin KA, Loftfield E, Boca SM, Sampson JN, Moore SC, Xiao Q, Huang WY, Xiong X, Freedman ND, Cross AJ, Sinha R. Serum biomarkers of habitual coffee consumption may provide insight into the mechanism underlying the association between coffee consumption and colorectal cancer. Am J Clin Nutr. 2015 May;101(5):1000-11. doi: 10.3945/ajcn.114.096099. Epub 2015 Mar 11.

    PubMed 25762808
  • Kvale PA, Johnson CC, Tammemagi M, Marcus PM, Zylak CJ, Spizarny DL, Hocking W, Oken M, Commins J, Ragard L, Hu P, Berg C, Prorok P. Interval lung cancers not detected on screening chest X-rays: How are they different? Lung Cancer. 2014 Oct;86(1):41-6. doi: 10.1016/j.lungcan.2014.07.013. Epub 2014 Jul 24.

    PubMed 25123333
  • Guertin KA, Moore SC, Sampson JN, Huang WY, Xiao Q, Stolzenberg-Solomon RZ, Sinha R, Cross AJ. Metabolomics in nutritional epidemiology: identifying metabolites associated with diet and quantifying their potential to uncover diet-disease relations in populations. Am J Clin Nutr. 2014 Jul;100(1):208-17. doi: 10.3945/ajcn.113.078758. Epub 2014 Apr 16.

    PubMed 24740205
  • Major JM, Yu K, Weinstein SJ, Berndt SI, Hyland PL, Yeager M, Chanock S, Albanes D. Genetic variants reflecting higher vitamin e status in men are associated with reduced risk of prostate cancer. J Nutr. 2014 May;144(5):729-33. doi: 10.3945/jn.113.189928. Epub 2014 Mar 12.

    PubMed 24623848
  • Hocking WG, Tammemagi MC, Commins J, Oken MM, Kvale PA, Hu P, Ragard LR, Riley TL, Pinsky P, Beck TM, Prorok PC. Diagnostic evaluation following a positive lung screening chest radiograph in the Prostate, Lung, Colorectal, Ovarian (PLCO) Cancer Screening Trial. Lung Cancer. 2013 Nov;82(2):238-44. doi: 10.1016/j.lungcan.2013.07.017. Epub 2013 Aug 7.

    PubMed 23993734

Questions about this trial

What is this clinical trial studying?

A study testing Laboratory Biomarker Analysis, Medical Examination Assessment and Screening Questionnaire Administration in people with Prostate Carcinoma, run by National Cancer Institute (NCI) at 1 site in United States.

The full registered description is in the About this study section and the official record.

Who may be eligible to take part?

The sponsor lists 0 inclusion and 12 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.

Is this clinical trial currently recruiting?

The record says: under way, not looking for participants, as of the sponsor's last update on 24 Jul 2026. Status can change between updates, so confirm with the study contact before making plans.

Where is the study taking place?

The record lists 1 site in United States. Whether a site is taking part right now should be confirmed with that site. See every site.

What are the possible benefits and risks?

They depend on the study and the treatment, and no study can promise a benefit. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.

Are results available for this study?

Yes. Results are posted in the registry (first posted 26 Jun 2014). A summary is in the For doctors view, and the full results are on ClinicalTrials.gov.

How can a doctor refer a patient or contact the research team?

The record lists no contact. The official record names the sponsor, who can be asked directly. AzTrials does not enrol participants or take referrals.

What does the primary outcome measure?

Prostate Cancer Deaths (time frame: Events through 13 years of follow-up or through December 31, 2009; median follow-up 12.0 years.). The study lists 2 primary outcomes in all. It is what the study was designed to measure, not a finding.

Where can I read the original study information?

On the ClinicalTrials.gov record for NCT00002540, which also lists 29 linked publications.

Does a listing mean the treatment is approved or proven to work?

No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.

How often is this information updated?

AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 24 Jul 2026.

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