Screening auf Darmkrebs bei älteren Patienten (PLCO Screening Trial)
Prostata-, Lungen-, Darm- und Eierstockkrebs-Screening-Studie (PLCO).
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 colorectal cancer.
Studienübersicht
Status
Status
Bedingungen
Bedingungen
Intervention / Behandlung
Intervention / Behandlung
Detaillierte Beschreibung
PRIMARY OBJECTIVES:
I. To determine whether screening with flexible sigmoidoscopy (60-cm sigmoidoscope) can reduce mortality from colorectal cancer in women and men aged 55-74 at study entry.
SECONDARY OBJECTIVES:
I. 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 (Colorectal Screening): Participants undergo a colorectal examination with a flexible sigmoidoscope at baseline and year 5. 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 colorectal cancer (follow-up diagnostic procedures are through their own medical care environment). Participants diagnosed with colorectal 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 colorectal 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.
Studientyp
Studientyp
Einschreibung (Tatsächlich)
Einschreibung
Phase
Phase
- Unzutreffend
Kontakte und Standorte
Studienorte
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Maryland
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Bethesda, Maryland, Vereinigte Staaten, 20892
- National Institutes of Health Clinical Center
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Teilnahmekriterien
Zulassungskriterien
Zulassungskriterien
Studienberechtigtes Alter
Akzeptiert gesunde Freiwillige
Studienberechtigte Geschlechter
Beschreibung
Exclusion Criteria:
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Men and women who at the time of randomization are less than 55 or greater than or equal to 75 years of age
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Individuals undergoing treatment for cancer at this time, excluding basal-cell and squamous-cell skin cancer
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Individuals with known prior cancer of the colon, rectum, lung, prostate
- This includes primary or metastatic PLCO cancers
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Individuals with previous surgical removal of the entire colon, one lung, or the entire prostate (men only)
- Until October 1996, women with previous surgical removal of both ovaries were excluded from the trial. In order to increase the enrollment of women into the trial, beginning in October 1996, these women were no longer excluded for this reason.
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Individuals who are participating in another cancer screening or cancer primary prevention trial
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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.
- Prior to April 1, 1999 women were excluded from the trial if they were currently taking or had taken Tamoxifen or Evista\Raloxifene in the past 6 months. As of April 1999 based on a decision from the PLCO Ovary Subcommittee, women who have or are currently taking Tamoxifen or Evista\Raloxifene are not excluded from participation.
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Individuals who are unwilling or unable to sign the informed consent form
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Males who have had more than one PSA blood test in the past three years
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Individuals who have had a colonoscopy, sigmoidoscopy, or barium enema in the past three years
Studienplan
Wie ist die Studie aufgebaut?
Designdetails
- Hauptzweck: Screening
- Zuteilung: Zufällig
- Interventionsmodell: Parallele Zuordnung
- Maskierung: Single
Anzahl der Arme
Waffen und Interventionen
Teilnehmergruppe / ArmTeilnehmergruppe / Arm |
Intervention / BehandlungIntervention / Behandlung |
|---|---|
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Kein Eingriff: Control
Participants receive standard medical care. Participants complete a DHQ at baseline. |
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Aktiver Komparator: Colorectal Screening
Participants undergo a colorectal examination with a flexible sigmoidoscope at baseline and year 5. 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 colorectal cancers as all deaths that occur among both screened and control subjects during the trial. |
Undergo questionnaire assessments Undergo a flexible sigmoidoscopy
Andere Namen:
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Was misst die Studie?
Primäre Ergebnismessungen
Primäre Ergebnismessungen
Ergebnis Maßnahme |
Maßnahmenbeschreibung |
Zeitfenster |
|---|---|---|
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Colorectal Cancer Deaths
Zeitfenster: Events through 13 years of follow-up or through December 31, 2009; median follow-up 12.1 years.
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Colorectal cancer deaths confirmed in participants by a death review committee if available, otherwise by death certificate. |
Events through 13 years of follow-up or through December 31, 2009; median follow-up 12.1 years.
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Colorectal Cancer Death Rates
Zeitfenster: Events through 13 years of follow-up or through December 31, 2009; median follow-up 12.1 years.
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Colorectal 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. |
Events through 13 years of follow-up or through December 31, 2009; median follow-up 12.1 years.
|
Sekundäre Ergebnismessungen
Sekundäre Ergebnismessungen
Ergebnis Maßnahme |
Maßnahmenbeschreibung |
Zeitfenster |
|---|---|---|
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Deaths From All Causes
Zeitfenster: Events through 13 years of follow-up or through December 31, 2009; median follow-up 12.1 years.
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Deaths from all causes were compared between the colorectal cancer screening arm and the usual care arm. |
Events through 13 years of follow-up or through December 31, 2009; median follow-up 12.1 years.
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Death Rates From All Causes
Zeitfenster: Events through 13 years of follow-up or through December 31, 2009; median follow-up 12.1 years.
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Deaths from all causes were compared between the colorectal cancer screening arm and the usual care arm. Rate is the number of deaths divided by person years of follow-up in the study. |
Events through 13 years of follow-up or through December 31, 2009; median follow-up 12.1 years.
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Colorectal Cancer Incidence
Zeitfenster: Events through 13 years of follow-up or through December 31, 2009; median follow-up 12.1 years.
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Colorectal cancer diagnoses confirmed by medical record abstraction. |
Events through 13 years of follow-up or through December 31, 2009; median follow-up 12.1 years.
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Colorectal Cancer Incidence Rates
Zeitfenster: Events through 13 years of follow-up or through December 31, 2009; median follow-up 12.1 years.
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Colorectal cancer diagnoses confirmed by medical record abstraction. Incidence rate (cumulative) defined as colorectal cancer diagnoses divided by person years at risk for colorectal cancer. |
Events through 13 years of follow-up or through December 31, 2009; median follow-up 12.1 years.
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Complications of Diagnostic Evaluation Following a Positive Screening Test
Zeitfenster: One year from screening examination
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Number of participants who experienced complications during diagnostic work-up of a positive colorectal examination. |
One year from screening examination
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T0 (Baseline) FSG Screening Results
Zeitfenster: T0 (at study entry)
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Flexible sigmoidoscopy (FSG) result |
T0 (at study entry)
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T3/T5 FSG Screening Result
Zeitfenster: T3 (three years after entry) or T5 (five years after entry)
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Flexible sigmoidoscopy (FSG) result |
T3 (three years after entry) or T5 (five years after entry)
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Mitarbeiter und Ermittler
Sponsor
Sponsor
Ermittler
Ermittler
- Hauptermittler: Christine D Berg, National Cancer Institute (NCI)
Publikationen und hilfreiche Links
Allgemeine Veröffentlichungen
- 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.
- 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.
- Kunzmann AT, Coleman HG, Huang WY, Cantwell MM, Kitahara CM, Berndt SI. Fruit and vegetable intakes and risk of colorectal cancer and incident and recurrent adenomas in the PLCO cancer screening trial. Int J Cancer. 2016 Apr 15;138(8):1851-61. doi: 10.1002/ijc.29922. Epub 2015 Dec 8.
- Kunzmann AT, Coleman HG, Huang WY, Kitahara CM, Cantwell MM, Berndt SI. Dietary fiber intake and risk of colorectal cancer and incident and recurrent adenoma in the Prostate, Lung, Colorectal, and Ovarian Cancer Screening Trial. Am J Clin Nutr. 2015 Oct;102(4):881-90. doi: 10.3945/ajcn.115.113282. Epub 2015 Aug 12.
- 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.
- 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.
Studienaufzeichnungsdaten
Haupttermine studieren
Studienbeginn (Tatsächlich)
Studienbeginn
Primärer Abschluss (Tatsächlich)
Primärer Abschluss
Studienabschluss (Geschätzt)
Studienabschluss
Studienanmeldedaten
Zuerst eingereicht
Zuerst eingereicht
Zuerst eingereicht, das die QC-Kriterien erfüllt hat
Zuerst eingereicht, das die QC-Kriterien erfüllt hat
Zuerst gepostet (Geschätzt)
Zuerst gepostet
Studienaufzeichnungsaktualisierungen
Letztes Update gepostet (Tatsächlich)
Letztes Update gepostet
Letztes eingereichtes Update, das die QC-Kriterien erfüllt
Letztes eingereichtes Update, das die QC-Kriterien erfüllt
Zuletzt verifiziert
Zuletzt verifiziert
Mehr Informationen
Begriffe im Zusammenhang mit dieser Studie
Zusätzliche relevante MeSH-Bedingungen
- Neubildungen nach Standort
- Neubildungen
- Darmerkrankungen
- Gastrointestinale Neubildungen
- Neoplasmen des Verdauungssystems
- Erkrankungen des Verdauungssystems
- Magen-Darm-Erkrankungen
- Kolorektale Neubildungen
- Darmtumoren
- Rektale Erkrankungen
- Darmerkrankungen
- Rektale Neoplasien
- Darmneoplasmen
- Diagnosetechniken und Verfahren
- Diagnose
- Chirurgische Eingriffe, operativ
- Minimal invasive chirurgische Verfahren
- Diagnosetechniken, chirurgisch
- Endoskopie, gastrointestinal
- Endoskopie, Verdauungssystem
- Diagnosetechniken, Verdauungssystem
- Endoskopie
- Chirurgische Verfahren des Verdauungssystems
- Koloskopie
- Sigmoidoskopie
Andere Studien-ID-Nummern
Andere Studien-ID-Nummern
- NCI-2012-01757
- CDR0000078532
- NCI-P93-0050
- PLCO-1
- NCI-2012-01757 (Registrierungskennung: CTRP (Clinical Trial Reporting Program))
- PLCO-Colorectal (Andere Kennung: National Cancer Institute)
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