Piloting a Dietary Vitamin E Intervention During Pregnancy
A Double Blind Randomised Placebo Controlled Pilot Study of a Dietary Soup Intervention During Pregnancy to Optimise Dietary Vitamin E Intake in Relation to Childhood Asthma.
In the last forty years the prevalence of asthma has increased in westernised countries. We have hypothesised that this increase may be a consequence of changing diet. Several birth cohort studies have now reported an association between reduced maternal vitamin E intake during pregnancy and childhood asthma.
However, it remains to be seen whether increasing maternal vitamin E intake during pregnancy reduces the risk of childhood asthma. We are planning a large placebo controlled trial in pregnant women, to investigate whether optimisation of dietary vitamin E intake to the recommended 15mg/day reduces the likelihood of childhood asthma. We believe that a dietary intervention using vitamin E in its natural form of food is more likely to be successful and acceptable than a vitamin E supplement. We have previously demonstrated than pregnant women can optimise their vitamin E intake using a personalised dietary plan with the help of a dietitian however this intervention was complex and could not be translated into everyday use. With commercial support we have developed a range of soups containing foods naturally rich in vitamin E designed to optimise maternal vitamin E intake to 15mg/day. A range of similar tasting and looking placebo soups has also been developed. In this study we will pilot a randomised controlled trial of the active and placebo soups to ascertain whether pregnant women are willing and able to optimise their vitamin E intake during pregnancy using the soups in order to reduce the risk of their child developing asthma. optimising maternal vitamin E intake during pregnancy.
Studieoversigt
Status
Status
Betingelser
Betingelser
Intervention / Behandling
Intervention / Behandling
Undersøgelsestype
Undersøgelsestype
Tilmelding (Faktiske)
Tilmelding
Fase
Fase
- Ikke anvendelig
Kontakter og lokationer
Studiesteder
-
-
-
Aberdeen, Det Forenede Kongerige, AB25 2ZN
- Aberdeen Maternity Hospital
-
-
Deltagelseskriterier
Berettigelseskriterier
Berettigelseskriterier
Aldre berettiget til at studere
Tager imod sunde frivillige
Køn, der er berettiget til at studere
Beskrivelse
Inclusion Criteria:
- 10-12 weeks pregnant.
- Routine low risk antenatal care.
- A personal or partner history of asthma at anytime.
- Able and willing to give informed consent to participate
- Able and willing to participate in the study procedures
Exclusion Criteria:
- Use of vitamin E supplements.
- A history of diabetes, coagulopathies or use of anticoagulants, use of clopidogrel, cholestyramine, cyclosporin A, gemfibrozil, isoniazid, orlistat, anticonvulsants.
- Any other significant disease or disorder which, in the opinion of the investigator, either puts the woman at risk because of participating in the study or may influence the results of the study, or the woman's ability to participate in the study.
- Participating in another clinical study
- Previous allocation of randomisation code in the study.
Studieplan
Hvordan er undersøgelsen tilrettelagt?
Design detaljer
- Primært formål: Forebyggelse
- Tildeling: Randomiseret
- Interventionel model: Parallel tildeling
- Maskning: Firedobbelt
Antal våben
Våben og indgreb
Deltagergruppe / ArmDeltagergruppe / Arm |
Intervention / BehandlingIntervention / Behandling |
|---|---|
|
Eksperimentel: Vitamin E enhanced diet
Range of three vitamin E enhanced soups (400g/tin) containing 18-20mg vitamin in natural food form.
Three portions per week
|
vitamin E enhancement is by virtue of the natural vitamin E content of the food ingredients
|
|
Placebo komparator: Non-enhanced dietary intervention
Range of three similar looking and tasting soups (400g/tin) with naturally low (<3mg) vitamin E content.
Three portions per week
|
Similar looking and tasting soups with low vitamin E content by virtue of food ingredients
|
Hvad måler undersøgelsen?
Primære resultatmål
Primære resultatmål
Resultatmål |
Tidsramme |
|---|---|
|
Participation of pregnant women in a randomised trial of enhanced and placebo soups from 12 weeks gestation until delivery.
Tidsramme: 1 year
|
1 year
|
Sekundære resultatmål
Sekundære resultatmål
Resultatmål |
Tidsramme |
|---|---|
|
Dietary vitamin E intake during pregnancy.
Tidsramme: 1 year
|
1 year
|
|
Lung function of new born infants.
Tidsramme: 1 year
|
1 year
|
Andre resultatmål
Andre resultatmål
Resultatmål |
Tidsramme |
|---|---|
|
Biomarker of dietary compliance
Tidsramme: 1 year
|
1 year
|
Samarbejdspartnere og efterforskere
Sponsor
Sponsor
Efterforskere
Efterforskere
- Ledende efterforsker: Graham Devereux, MD, University of Aberdeen
Publikationer og nyttige links
Generelle publikationer
- Devereux G, Turner SW, Craig LC, McNeill G, Martindale S, Harbour PJ, Helms PJ, Seaton A. Low maternal vitamin E intake during pregnancy is associated with asthma in 5-year-old children. Am J Respir Crit Care Med. 2006 Sep 1;174(5):499-507. doi: 10.1164/rccm.200512-1946OC. Epub 2006 Jun 8.
- Litonjua AA, Rifas-Shiman SL, Ly NP, Tantisira KG, Rich-Edwards JW, Camargo CA Jr, Weiss ST, Gillman MW, Gold DR. Maternal antioxidant intake in pregnancy and wheezing illnesses in children at 2 y of age. Am J Clin Nutr. 2006 Oct;84(4):903-11. doi: 10.1093/ajcn/84.4.903.
Datoer for undersøgelser
Studer store datoer
Studiestart
Studiestart
Primær færdiggørelse (Faktiske)
Primær færdiggørelse
Studieafslutning (Faktiske)
Studieafslutning
Datoer for studieregistrering
Først indsendt
Først indsendt
Først indsendt, der opfyldte QC-kriterier
Først indsendt, der opfyldte QC-kriterier
Først opslået (Skøn)
Først opslået
Opdateringer af undersøgelsesjournaler
Sidste opdatering sendt (Skøn)
Sidste opdatering sendt
Sidste opdatering indsendt, der opfyldte kvalitetskontrolkriterier
Sidste opdatering indsendt, der opfyldte kvalitetskontrolkriterier
Sidst verificeret
Sidst verificeret
Mere information
Begreber relateret til denne undersøgelse
Nøgleord
Yderligere relevante MeSH-vilkår
- Luftvejssygdomme
- Sygdomme i immunsystemet
- Lungesygdomme
- Overfølsomhed, Øjeblikkelig
- Bronchiale sygdomme
- Lungesygdomme, obstruktiv
- Respiratorisk overfølsomhed
- Overfølsomhed
- Astma
- Lægemidlers fysiologiske virkninger
- Molekylære mekanismer for farmakologisk virkning
- Beskyttelsesagenter
- Mikronæringsstoffer
- Vitaminer
- Antioxidanter
- E-vitamin
Andre undersøgelses-id-numre
Andre undersøgelses-id-numre
- 2/0036/12
- 12/NS/0053 (Anden identifikator: North of Scotland Research Ethics Service)
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