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CompletedNCT00514280Updated Jul 2, 2017

Tobacco Smoke and Lead Exposure During Pregnancy

An observational study in Lead Exposure in Pregnant Women and Tobacco Smoke Exposure Pregnant Women, sponsored by Eunice Kennedy Shriver National Institute of Child Health and Human Development (NICHD). Completed at 1 site in United States. Open to female participants aged 18 Years to 49 Years. Per ClinicalTrials.gov, last updated 2017-07-02.

Sponsored by Eunice Kennedy Shriver National Institute of Child Health and Human Development (NICHD) · Observational

Study type
Observational
Time perspective
Other
Enrollment
400
Ages
18 Years to 49 Years
Sex
Female
01

Study summary

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.
Read the detailed description

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.

02

Conditions studied

  • Lead Exposure in Pregnant Women
  • Tobacco Smoke Exposure Pregnant Women

Browse trials for

Keywords

  • Lead and Smoke Study in D.C.
  • Birth Weight
  • Gestational Age
  • Lead
  • Tobacco Smoke
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In context

Birth Weight

445 studies on the registry are indexed under Birth Weight; 36 are open to participants now.

This study's planned enrollment of 400 is above the median of 212 across 136 observational studies indexed under Birth Weight.

Browse Birth Weight studies →

Lead sponsor

Eunice Kennedy Shriver National Institute of Child Health and Human Development (NICHD) is the lead sponsor of 416 studies on the registry; 25 are open to participants now.

Of its 13 completed or terminated interventional studies of FDA-regulated products, 10 (77%) have results posted.

Counted across the registry records on this site, refreshed daily.

04

Who can participate

Ages eligible
18 Years to 49 Years
Sexes eligible
Female
Accepts healthy volunteers
No

Eligibility criteria

  • 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

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Study design

Time perspective
Other
Enrollment
400 participants (estimated)
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Study locations

1 site
  • National Institute of Child Health and Human Development (NICHD), 9000 Rockville
    Bethesda, Maryland 20892, United States
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References and documents

Publications

  • Haddow JE, Knight GJ, Palomaki GE, McCarthy JE. Second-trimester serum cotinine levels in nonsmokers in relation to birth weight. Am J Obstet Gynecol. 1988 Aug;159(2):481-4. doi: 10.1016/s0002-9378(88)80114-5. PubMed 3407708 ↗
  • Gonzalez-Cossio T, Peterson KE, Sanin LH, Fishbein E, Palazuelos E, Aro A, Hernandez-Avila M, Hu H. Decrease in birth weight in relation to maternal bone-lead burden. Pediatrics. 1997 Nov;100(5):856-62. doi: 10.1542/peds.100.5.856. PubMed 9346987 ↗
  • Mannino DM, Homa DM, Matte T, Hernandez-Avila M. Active and passive smoking and blood lead levels in U.S. adults: data from the Third National Health and Nutrition Examination Survey. Nicotine Tob Res. 2005 Aug;7(4):557-64. doi: 10.1080/14622200500185264. PubMed 16085527 ↗
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Updates

Tracking since Sep 25, 2026
No changes since tracking began. The registry record was last updated on Jul 2, 2017, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
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Registry details

Key details

Study ID
NCT00514280
Lead sponsor
Eunice Kennedy Shriver National Institute of Child Health and Human Development (NICHD)
First posted
Aug 9, 2007
Start date
Aug 2, 2007
Completion
May 11, 2011
Last update
Jul 2, 2017
View the source record on ClinicalTrials.gov ↗

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This study is completed, as verified in May 2011. You cannot join it, but the record below documents what was studied.

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