The Urban Environment and Childhood Asthma (URECA) birth cohort study: Design, methods, and study population

James E. Gern, Cynthia M. Visness, Peter J. Gergen, Robert A Wood, Gordon R. Bloomberg, George T. O'Connor, Meyer Kattan, Hugh A. Sampson, Frank R Witter, Megan T. Sandel, Wayne G. Shreffler, Rosalind J. Wright, Samuel J. Arbes, William W. Busse

Research output: Contribution to journalArticle

Abstract

Background: The incidence and morbidity of wheezing illnesses and childhood asthma is especially high in poor urban areas. This paper describes the study design, methods, and population of the Urban Environment and Childhood Asthma (URECA) study, which was established to investigate the immunologic causes of asthma among inner-city children. Methods and Results: URECA is an observational prospective study that enrolled pregnant women in central urban areas of Baltimore, Boston, New York City, and St. Louis and is following their offspring from birth through age 7 years. The birth cohort consists of 560 inner-city children who have at least one parent with an allergic disease or asthma, and all families live in areas in which at least 20% of the population has incomes below the poverty line. In addition, 49 inner-city children with no parental history of allergies or asthma were enrolled. The primary hypothesis is that specific urban exposures in early life promote a unique pattern of immune development (impaired antiviral and increased Th2 responses) that increases the risk of recurrent wheezing and allergic sensitization in early childhood, and of asthma by age 7 years. To track immune development, cytokine responses of blood mononuclear cells stimulated ex vivo are measured at birth and then annually. Environmental assessments include allergen and endotoxin levels in house dust, pre- and postnatal maternal stress, and indoor air nicotine and nitrogen dioxide. Nasal mucous samples are collected from the children during respiratory illnesses and analyzed for respiratory viruses. The complex interactions between environmental exposures and immune development will be assessed with respect to recurrent wheeze at age 3 years and asthma at age 7 years. Conclusion: The overall goal of the URECA study is to develop a better understanding of how specific urban exposures affect immune development to promote wheezing illnesses and asthma.

Original languageEnglish (US)
Article number17
JournalBMC Pulmonary Medicine
Volume9
DOIs
StatePublished - May 8 2009

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Cohort Studies
Asthma
Parturition
Population
Respiratory Sounds
Nitrogen Dioxide
Baltimore
Urban Population
Environmental Exposure
Poverty
Dust
Nicotine
Nose
Endotoxins
Allergens
Observational Studies
Antiviral Agents
Pregnant Women
Blood Cells
Hypersensitivity

ASJC Scopus subject areas

  • Pulmonary and Respiratory Medicine

Cite this

The Urban Environment and Childhood Asthma (URECA) birth cohort study : Design, methods, and study population. / Gern, James E.; Visness, Cynthia M.; Gergen, Peter J.; Wood, Robert A; Bloomberg, Gordon R.; O'Connor, George T.; Kattan, Meyer; Sampson, Hugh A.; Witter, Frank R; Sandel, Megan T.; Shreffler, Wayne G.; Wright, Rosalind J.; Arbes, Samuel J.; Busse, William W.

In: BMC Pulmonary Medicine, Vol. 9, 17, 08.05.2009.

Research output: Contribution to journalArticle

Gern, JE, Visness, CM, Gergen, PJ, Wood, RA, Bloomberg, GR, O'Connor, GT, Kattan, M, Sampson, HA, Witter, FR, Sandel, MT, Shreffler, WG, Wright, RJ, Arbes, SJ & Busse, WW 2009, 'The Urban Environment and Childhood Asthma (URECA) birth cohort study: Design, methods, and study population', BMC Pulmonary Medicine, vol. 9, 17. https://doi.org/10.1186/1471-2466-9-17
Gern, James E. ; Visness, Cynthia M. ; Gergen, Peter J. ; Wood, Robert A ; Bloomberg, Gordon R. ; O'Connor, George T. ; Kattan, Meyer ; Sampson, Hugh A. ; Witter, Frank R ; Sandel, Megan T. ; Shreffler, Wayne G. ; Wright, Rosalind J. ; Arbes, Samuel J. ; Busse, William W. / The Urban Environment and Childhood Asthma (URECA) birth cohort study : Design, methods, and study population. In: BMC Pulmonary Medicine. 2009 ; Vol. 9.
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AU - O'Connor, George T.

AU - Kattan, Meyer

AU - Sampson, Hugh A.

AU - Witter, Frank R

AU - Sandel, Megan T.

AU - Shreffler, Wayne G.

AU - Wright, Rosalind J.

AU - Arbes, Samuel J.

AU - Busse, William W.

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