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Tobacco Smoke and Lead Exposure During Pregnancy

30 juni 2017 uppdaterad av: Eunice Kennedy Shriver National Institute of Child Health and Human Development (NICHD)

Tobacco Smoke and Lead Exposure During Pregnancy: Intervention to Reduce Effects on Birth-Weight and Gestational Age

This study will test whether a short interview session about lead and secondhand tobacco smoke can help pregnant women reduce their exposure to lead and secondhand smoke. Both lead and secondhand tobacco smoke can cause problems with a pregnancy. The best way to prevent exposure to lead and secondhand tobacco smoke is to recognize the sources and avoid them.

Non-smoking African-American and Hispanic pregnant women between 18 and 49 years of age who live in Washington, D.C. may be eligible for this study.

Participants are randomly assigned to one of two study groups. Both groups have a 30-minute one-on-one session with a member of the study staff. The content of the session differs between groups. In addition, all women undergo the following tests and procedures:

Answer questions about themselves, their pregnancies, diet, home and smokers in the home.
Requested to provide permission to obtain medical records of children older than 12 months of age who have ever been seen at Children's National Medical Center.
Blood draws at least four times during the study: at the time of enrollment, during the second trimester of the pregnancy, during the third trimester, and at the time of delivery. Up to three optional blood samples may also be requested, one during each trimester of the pregnancy. Blood samples are used to measure lead, cotinine (a chemical the body makes out of nicotine) and hematocrit (a test for anemia).
Collection of umbilical cord blood at the time of delivery.
Answer questions after the delivery about the patient's health, the delivery and the baby.

Studieöversikt

Status

Avslutad

Betingelser

Detaljerad beskrivning

Prenatal exposure to lead and tobacco has been shown to cause long-term adverse effects to the fetus and child, including decreased birthweight and premature delivery. These effects have been shown even at very low exposure levels. Since both exposures can be modified, many experts recommend screening for and counseling to prevent or reduce these exposures as part of routine prenatal care. The high infant mortality in the District of Columbia (DC) (10.2 deaths per 1,000 live births, versus 6.2 deaths per 1,000 births nationally) is incompletely understood, but disparities in health and healthcare access for minority populations, premature delivery, and low birthweight are likely contributors. Several studies and prevention programs have addressed smoking by and secondhand tobacco smoke (SHS) exposure of pregnant women living in DC in an effort to reduce the infant mortality rate, but none have addressed elevated blood lead levels (BLL) or the effects of exposure to both elevated BLL and SHS. Since DC children have high rates of both elevated BLL and SHS exposure, compared to the US population, we hypothesize that pregnant women in DC have similar high rates of elevated BLL and SHS exposure, AND that these exposures contribute to the high rates of low birthweight and decreased gestational age, and therefore to the rate of infant mortality in DC. The primary aim of this study is to determine the effectiveness of a screening and secondary prevention intervention for elevated blood lead and SHS exposure of low income, pregnant women living in Washington, DC.

Studietyp

Observationell

Inskrivning (Förväntat)

400

Kontakter och platser

Det här avsnittet innehåller kontaktuppgifter för dem som genomför studien och information om var denna studie genomförs.

Studieorter

Förenta staterna
- Maryland
  - Bethesda, Maryland, Förenta staterna, 20892
    - National Institute of Child Health and Human Development (NICHD), 9000 Rockville

Deltagandekriterier

Forskare letar efter personer som passar en viss beskrivning, så kallade behörighetskriterier. Några exempel på dessa kriterier är en persons allmänna hälsotillstånd eller tidigare behandlingar.

Urvalskriterier

Åldrar som är berättigade till studier

18 år till 49 år (Vuxen)

Tar emot friska volontärer

Nej

Kön som är behöriga för studier

Kvinna

Beskrivning

INCLUSION CRITERIA:

Female

Pregnant

Age 18-49

Self-identified as African-American or Hispanic/Latino

Patient at participating clinic

DC resident at the time of enrollment

No tobacco use of any kind after week 13 of the current pregnancy

Able to read, write and understand English

Able to give informed consent

Able to cooperate with testing procedures

Studieplan

Det här avsnittet ger detaljer om studieplanen, inklusive hur studien är utformad och vad studien mäter.

Hur är studien utformad?

Designdetaljer

Samarbetspartners och utredare

Det är här du hittar personer och organisationer som är involverade i denna studie.

Sponsor

Eunice Kennedy Shriver National Institute of Child Health and Human Development (NICHD)

Publikationer och användbara länkar

Den som ansvarar för att lägga in information om studien tillhandahåller frivilligt dessa publikationer. Dessa kan handla om allt som har med studien att göra.

Allmänna publikationer

Studieavstämningsdatum

Dessa datum spårar framstegen för inlämningar av studieposter och sammanfattande resultat till ClinicalTrials.gov. Studieposter och rapporterade resultat granskas av National Library of Medicine (NLM) för att säkerställa att de uppfyller specifika kvalitetskontrollstandarder innan de publiceras på den offentliga webbplatsen.

Studera stora datum

Studiestart

2 augusti 2007

Avslutad studie

11 maj 2011

Studieregistreringsdatum

Först inskickad

8 augusti 2007

Först inskickad som uppfyllde QC-kriterierna

8 augusti 2007

Första postat (Uppskatta)

9 augusti 2007

Uppdateringar av studier

Senaste uppdatering publicerad (Faktisk)

2 juli 2017

Senaste inskickade uppdateringen som uppfyllde QC-kriterierna

30 juni 2017

Senast verifierad

11 maj 2011

Mer information

Termer relaterade till denna studie

Nyckelord

Ytterligare relevanta MeSH-villkor

Andra studie-ID-nummer

999907199
07-CH-N199

Denna information hämtades direkt från webbplatsen clinicaltrials.gov utan några ändringar. Om du har några önskemål om att ändra, ta bort eller uppdatera dina studieuppgifter, vänligen kontakta register@clinicaltrials.gov. Så snart en ändring har implementerats på clinicaltrials.gov, kommer denna att uppdateras automatiskt även på vår webbplats .

Tobacco Smoke and Lead Exposure During Pregnancy