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Home > "O" Clinical Trials Conditions > Occupation and Asthma in an Urban Low Income Population  Occupation and Asthma in an Urban Low Income Population
Occupation and Asthma in an Urban Low Income Population
For Condition: Asthma,Lung Diseases
Status: Completed
Sponsor(s): National Heart, Lung, and Blood Institute (NHLBI) ,
Synopsis: To study work-related asthma in a low-income, urban population.
Details: BACKGROUND: Work-related asthma is asthma that is attributable to, or is made worse by, environmental exposures in the workplace. Published estimates of the proportion of adult asthma attributable to occupational factors have varied widely, depending on population, methodology, and definitions, from 2 percent to 33 percent. Occupational asthma is of great public health importance because it is potentially preventable, can cause substantial disability, and in some cases is completely curable. Among adults in the United States, asthma has become a major public health problem, with rates most elevated among low income, urban, African American and Latino sectors of the population, and with substantial evidence suggesting potential occupational contributions to the excess rates. These important sectors of the U.S. population have, however, been inadequately represented in the occupational asthma research literature. DESIGN NARRATIVE: This was a case control study of physician-diagnosed asthma, occupation, industry, and workplace environmental exposures designed to evaluate the hypothesis that a substantial component of the asthma burden in a low income, urban, largely minority population was due to occupational factors. The study design addressed a variety of methodologic challenges including healthy worker effects, difficulty contacting and recruiting this potentially high risk population, large numbers of potential etiologic agents, mixed exposures, small workplaces, and low absolute incidence of occupational asthma. The study population was the catchment population of Bellevue Hospital, a general hospital in lower Manhattan, New York City, with busy ambulatory care services that serve low income working communities. Cases and controls were recruited from among outpatients and inpatients at Bellevue Hospital and interviewed face-to-face or by telephone. Occupation, industry, and occupational exposures were determined by questionnaire supplemented by a Job Exposure Matrix. Odds ratios (ORs) of association between asthma and specific industrial, occupational, and exposure categories, controlled for major confounders, were estimated. The ORs were used to calculate occupation- and industry-specific Attributable Fractions, and an overall Population Attributable Fraction of asthma attributable to occupational factors. New onset occupational asthma and work-aggravated asthma were investigated separately.
Eligibility:
Study Type: Observational, Natural History, Case Control
Minimum Age/Maximum Age: /
Genders: Male
Protocol Entry Criteria: No eligibility criteria
Total Enrollment:
Location and Contact Information:
Overall Study Official:
GeorgeFriedman-Jimenez, , New York University School of Medicine
Additional Information:
Study ID Numbers: 964;
Study Start Date: March 2001
Record last reviewed: February 2004
Additional information available at: clinicaltrials.gov
Clinicaltrials.gov Reference link: NCT00014820
Other Lung Diseases Studies:
1. Sleep Apnea in a Non-Clinical Population
2. Analysis of Longitudinal Cardiopulmonary Data
3. National Heart, Lung, and Blood Institute Twin Study
4. Development and Evaluation of Community Asthma Program
5. Asthma Partnership for Minority Children
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Occupation and Asthma in an Urban Low Income Population
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