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Vitamin D, Genes and Colorectal Cancer

15. december 2017 opdateret af: Vibeke Andersen, University of Southern Denmark

Associations Between Genetically Determined Low Vitamin D Level, Vitamin D Intake and Risk of Colorectal Cancer in a Prospective Case-cohort Study in Danes

The aim of this study is to investigate the interaction between intake of vitamin D and polymorphisms in GC and CYP2R1 in relation to risk of colorectal cancer in a Danish prospective cohort study.

Studieoversigt

Status

Afsluttet

Betingelser

Intervention / Behandling

Detaljeret beskrivelse

The association between vitamin D and incidence of colorectal cancer (CRC) has been thoroughly investigated in both observational and experimental studies, but the results are conflicting. Genetic epidemiology is an advantageous alternative to randomized, clinical trials for ethical and economic reasons.

The aim of this study is to investigate whether polymorphisms in GC and CYP2R1 that predicts 25-hydroxycholecalciferol (25(OH)D) concentrations after both ultraviolet B radiation and consumption of vitamin D3-fortified bread and milk in Danes are associated with risk of CRC; and further, to examine whether intake of vitamin D through diet and supplementation alter the risk of CRC.

Data are retrieved from the Danish prospective "Diet, Cancer and Health" study encompassing 57,053 persons which were recruited between 1993 to 1997. Between 1994 and 31th December 2009, 1038 CRC cases has been diagnosed. A sub-cohort of 1857 persons has been randomly selected within the full cohort at time of entry into the cohort. The study design is a nested case-cohort study.

Undersøgelsestype

Observationel

Tilmelding (Faktiske)

2895

Deltagelseskriterier

Forskere leder efter personer, der passer til en bestemt beskrivelse, kaldet berettigelseskriterier. Nogle eksempler på disse kriterier er en persons generelle helbredstilstand eller tidligere behandlinger.

Berettigelseskriterier

Aldre berettiget til at studere

50 år til 64 år (Voksen)

Tager imod sunde frivillige

Ja

Køn, der er berettiget til at studere

Alle

Prøveudtagningsmetode

Ikke-sandsynlighedsprøve

Studiebefolkning

The Diet, Cancer and Health study is an ongoing Danish cohort study designed to investigate the relation between diet, lifestyle and cancer risk. The cohort consists of 57,053 persons, recruited between December 1993 and May 1997. All the subjects were born in Denmark, and the individuals were 50 to 64 years of age and had no previous cancers at study entry. Blood samples, anthropometric measures and questionnaire data on diet and lifestyle were collected at study entry.

The present study uses a nested case-cohort design. Follow-up is based on population-based cancer registries. Between 1994 and 31th December 2009, 1038 CRC cases were diagnosed. A sub-cohort of 1857 persons has randomly been selected within the full cohort at time of entry into the cohort.

Beskrivelse

Inclusion Criteria:

  • Born in Denmark
  • No previous cancers at study entry
  • Age between 50-64

Exclusion Criteria:

  • Previous or present cancer(s) at study entry

Studieplan

Dette afsnit indeholder detaljer om studieplanen, herunder hvordan undersøgelsen er designet, og hvad undersøgelsen måler.

Hvordan er undersøgelsen tilrettelagt?

Design detaljer

Kohorter og interventioner

Gruppe / kohorte
Intervention / Behandling
Colorectal cancer cases
1038 participants diagnosed with colorectal cancer from the Diet, Cancer and Health cohort.
Andet: Observational
Information on diet, lifestyle, weight, height, medical treatment, environmental exposures, and other socio-economic factors were collected at enrolment using questionnaires and interviews
Sub-cohort members
1857 persons randomly selected within the full cohort at time of entry into the Diet, Cancer and Health cohort. These participants serve as controls for the colorectal cancer cases.
Andet: Observational
Information on diet, lifestyle, weight, height, medical treatment, environmental exposures, and other socio-economic factors were collected at enrolment using questionnaires and interviews

Hvad måler undersøgelsen?

Primære resultatmål

Resultatmål
Foranstaltningsbeskrivelse
Tidsramme
Incidence of colorectal cancer in the DCH cohort
Tidsramme: Between 1994 and 31th December 2009
Risk of coloractal cancer compared to healthy sub-cohort members and interaction with Vitamin D metabolizing genes and vitamin D intake
Between 1994 and 31th December 2009

Samarbejdspartnere og efterforskere

Det er her, du vil finde personer og organisationer, der er involveret i denne undersøgelse.

Sponsor

University of Southern Denmark

Samarbejdspartnere

Danish Cancer Society

Efterforskere

  • Studieleder: Vibeke Andersen, MD, PhD, University of Southern Denmark

Publikationer og nyttige links

Den person, der er ansvarlig for at indtaste oplysninger om undersøgelsen, leverer frivilligt disse publikationer. Disse kan handle om alt relateret til undersøgelsen.

Generelle publikationer

Datoer for undersøgelser

Disse datoer sporer fremskridtene for indsendelser af undersøgelsesrekord og resumeresultater til ClinicalTrials.gov. Studieregistreringer og rapporterede resultater gennemgås af National Library of Medicine (NLM) for at sikre, at de opfylder specifikke kvalitetskontrolstandarder, før de offentliggøres på den offentlige hjemmeside.

Studer store datoer

Studiestart (Faktiske)

1. december 1993

Primær færdiggørelse (Faktiske)

1. maj 1997

Studieafslutning (Faktiske)

1. december 2017

Datoer for studieregistrering

Først indsendt

6. december 2017

Først indsendt, der opfyldte QC-kriterier

6. december 2017

Først opslået (Faktiske)

12. december 2017

Opdateringer af undersøgelsesjournaler

Sidste opdatering sendt (Faktiske)

19. december 2017

Sidste opdatering indsendt, der opfyldte kvalitetskontrolkriterier

15. december 2017

Sidst verificeret

1. december 2017

Mere information

Begreber relateret til denne undersøgelse

Nøgleord

Yderligere relevante MeSH-vilkår

Andre undersøgelses-id-numre

  • 19-Dvit

Plan for individuelle deltagerdata (IPD)

Planlægger du at dele individuelle deltagerdata (IPD)?

INGEN

Lægemiddel- og udstyrsoplysninger, undersøgelsesdokumenter

Studerer et amerikansk FDA-reguleret lægemiddelprodukt

Ingen

Studerer et amerikansk FDA-reguleret enhedsprodukt

Ingen

Disse oplysninger blev hentet direkte fra webstedet clinicaltrials.gov uden ændringer. Hvis du har nogen anmodninger om at ændre, fjerne eller opdatere dine undersøgelsesoplysninger, bedes du kontakte register@clinicaltrials.gov. Så snart en ændring er implementeret på clinicaltrials.gov, vil denne også blive opdateret automatisk på vores hjemmeside .

Kliniske forsøg med Kolorektal cancer

Kliniske forsøg med Observational

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Sponsorer og samarbejdspartnere

Medicinske tilstande

Narkotikainterventioner

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Betingelser

Sjældne sygdomme

Narkotikainterventioner

Kosttilskud

Sponsor / samarbejdspartnere

Placeringer

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