Clinical trial Recruiting at 2 sites Observational Ages 6 to 16

Using vitamin C to improve lung function in children of pregnant smokers

Official title: Assessing the Effect of Vitamin C on Infant Lung Function When Given to Pregnant Women Who Smoke - (Long Term Follow-up of a Randomized Trial)

Run by Oregon Health and Science University · NCT06106646 · Data updated 2026-11-12

This study is testing if giving pregnant women vitamin C can help improve lung function in their children who were exposed to smoking during pregnancy.

More Asthma trials

Quick facts

Study typeObservational
Ages6 Years to 16 Years
SexAll
Enrollment225 (estimated)
SponsorOregon Health and Science University
Academic / other
Locations2 sites (Indianapolis, Indiana and 1 other locations)
StatusRecruiting
StartedOctober 11, 2023
Main results expectedAugust 2027
Study endsAugust 2028
Registry record updatedMarch 18, 2025
Trial IDNCT06106646 on ClinicalTrials.gov

Is this trial a fit for you?

Likely a good fit

Ideal candidates include children of mothers who participated in the original VCSIP study, specifically those whose mothers smoked during pregnancy.

Probably not a fit

Patients who were not part of the original VCSIP study or whose mothers did not smoke during pregnancy may not benefit from this study.

A plain-English reading of the study's rules. Only the study team can confirm whether you qualify.

What this trial studies

This observational study aims to assess the long-term effects of prenatal vitamin C supplementation on the pulmonary function of children born to mothers who smoked during pregnancy. Following up on the original VCSIP trial, the study will compare airway function tests and the occurrence of wheezing in children at 10 years of age, based on whether their mothers received vitamin C or a placebo during pregnancy. The study will also include advanced imaging techniques to analyze lung structure and DNA methylation differences between the two groups.

Why it matters

Potential benefit: If successful, this study could lead to improved lung health in children exposed to smoking in utero.

How similar studies have gone: Previous studies have shown promising results regarding the benefits of vitamin C supplementation in similar contexts, but this specific long-term follow-up is novel.

Who can join: the full rules

Show full inclusion / exclusion criteria
Inclusion Criteria:

* Women and their offspring randomized to vitamin C versus placebo during pregnancy as well as pregnant nonsmokers and their offspring enrolled as the reference group in the original VCSIP study

Exclusion Criteria:

* participants who specifically withdraw consent

Where it's running

  • Indiana University
    Indianapolis, Indiana, United States
    Recruiting
  • Oregon Health and Science University (OHSU)
    Portland, Oregon, United States
    Recruiting

Study contacts

  • Principal investigator: Cindy McEvoy, MD, MCR — Oregon Health and Science University
  • Study coordinator: Cindy McEvoy, MD, MCR
  • Email: mcevoyc@ohsu.edu
  • Phone: 503-494-0223

Similar studies

Other studies for the same condition or treatment. Recruiting studies are listed first.

  • Vitamin D supplementation during pregnancy to prevent early childhood asthma

    This study is testing if giving high-dose vitamin D to pregnant women can help prevent asthma and wheezing in their children by the time they reach three years old.

    Recruiting Phase 3 Copenhagen Studies on Asthma in Childhood · Gentofte Municipality · NCT06570889

  • Fish oil supplementation during pregnancy to prevent asthma in children

    This study is testing if taking high-dose fish oil during pregnancy can help reduce the chances of children developing asthma and breathing problems.

    Recruiting Phase 3 Copenhagen Studies on Asthma in Childhood · Gentofte Municipality · NCT06560255

  • Observing symptoms in children with first-onset bronchial asthma

    This study looks at how asthma shows up in kids and teens aged 3 to 18, especially if they have unusual symptoms like a chronic cough, to see if a specific questionnaire can help spot these cases better.

    Recruiting Charles University, Czech Republic · Prague · NCT06201494

  • National cohort of children with respiratory issues in Switzerland

    This study looks at children in Switzerland with breathing problems to see how these issues affect their health and treatment over time.

    Recruiting at 9 sites University of Bern · Vienna and 11 other locations · NCT03505216

  • Chronic Respiratory Disease Participant Engagement

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    Recruiting Richmond Pharmacology Limited · London · NCT07924462

  • HB0056 in adults with moderate to severe asthma

    This study tests HB0056 versus a placebo to see if it helps adults with moderate to severe asthma reduce rescue inhaler use and improve symptoms.

    Recruiting at 2 sites Phase 1/2 Shanghai Huaota Biopharmaceutical Co., Ltd. · Beijing and 1 other locations · NCT07899996

How to take part

  1. Review the eligibility criteria above with your treating physician.
  2. Check the official listing on ClinicalTrials.gov for the latest contact details and recruitment status.
  3. Contact the study coordinator or principal investigator to ask for pre-screening. Pre-screening is free and never obligates you to enroll.
Last reviewed 2026-11-14 by the Find a Trial editorial team. Information on this page is for educational purposes and is not medical advice. Always consult qualified healthcare professionals about clinical trial participation.