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Tobacco Smoke and Lead Exposure During Pregnancy

30. juni 2017 opdateret af: 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.

Studieoversigt

Status

Afsluttet

Betingelser

Detaljeret beskrivelse

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.

Undersøgelsestype

Observationel

Tilmelding (Forventet)

400

Kontakter og lokationer

Dette afsnit indeholder kontaktoplysninger for dem, der udfører undersøgelsen, og oplysninger om, hvor denne undersøgelse udføres.

Studiesteder

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

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

18 år til 49 år (Voksen)

Tager imod sunde frivillige

Ingen

Køn, der er berettiget til at studere

Kvinde

Beskrivelse

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

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

Hvordan er undersøgelsen tilrettelagt?

Design detaljer

Samarbejdspartnere og efterforskere

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

Sponsor

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

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

2. august 2007

Studieafslutning

11. maj 2011

Datoer for studieregistrering

Først indsendt

8. august 2007

Først indsendt, der opfyldte QC-kriterier

8. august 2007

Først opslået (Skøn)

9. august 2007

Opdateringer af undersøgelsesjournaler

Sidste opdatering sendt (Faktiske)

2. juli 2017

Sidste opdatering indsendt, der opfyldte kvalitetskontrolkriterier

30. juni 2017

Sidst verificeret

11. maj 2011

Mere information

Begreber relateret til denne undersøgelse

Nøgleord

Yderligere relevante MeSH-vilkår

Andre undersøgelses-id-numre

999907199
07-CH-N199

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 .

Tobacco Smoke and Lead Exposure During Pregnancy