Opting In vs Opting Out
Public ClinicalTrials.gov record NCT01233804. Field values are reproduced from the official study page; the official ClinicalTrials.gov record remains the source of truth for eligibility, enrollment, and contact information.
Data is sourced from official ClinicalTrials.gov public API records. Always review the official ClinicalTrials.gov record for the latest information.
Official title
Opting In vs Opting Out: Impact on Influenza Vaccination in Pregnant Women
Brief summary
Reproduced verbatim from the official ClinicalTrials.gov record. Not medical advice.
The purpose of this study is to compare methods for consenting (opting in vs opting out) on influenza vaccine uptake rate in pregnant women. This study is designed to learn about the impact of influenza vaccination in pregnant women. This study will help gather knowledge about influenza vaccine side effects (if given) and whether the vaccine reduces the number of respiratory infection in mothers and their infants.
Study identification
- NCT ID
- NCT01233804
- Recruitment status
- Completed
- Study type
- Interventional
- Phase
- Not applicable
- Enrollment
- 280 participants
Conditions and interventions
Conditions
Eligibility (public fields only)
- Age range
- 18 Years and older
- Sex
- Female
- Healthy volunteers
- Healthy volunteers not accepted
This page does not interpret eligibility. Detailed inclusion and exclusion criteria are on the official ClinicalTrials.gov record.
Study timeline
- Start date
- Oct 31, 2010
- Primary completion
- Feb 28, 2011
- Completion
- Jul 31, 2011
- Last update posted
- May 30, 2018
2010 – 2011
United States locations
- U.S. sites
- 2
- U.S. states
- 1
- U.S. cities
- 2
| Facility | City | State | ZIP | Site status |
|---|---|---|---|---|
| University of Texas Medical Branch, Women's Clinics | Galveston | Texas | 77555 | — |
| University of Texas Health Science Center at Houston, Professional Building | Houston | Texas | 77030 | — |
Site contact phone numbers, emails, and investigator names are intentionally not displayed here. Open the official ClinicalTrials.gov record for site contact information.
About this trial record page
- What this page shows
- Public field values for ClinicalTrials.gov record NCT01233804, including study identification, conditions, interventions, eligibility (age, sex, healthy volunteer), timeline, and U.S. site list.
- What this page does not do
- No medical advice, eligibility judgments, treatment recommendations, study quality scoring, or AI-generated medical summaries. No site contact phone numbers, emails, or investigator names.
- Where the data comes from
- Sourced from the official ClinicalTrials.gov public API. The official record is the source of truth.
- Last refresh
- Last update posted May 30, 2018 · Synced Sep 12, 2026
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Open the official record
The complete protocol, eligibility criteria, and contact information for NCT01233804 live on ClinicalTrials.gov.