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Assessing the Occupation Burden in COPD

This study has been completed.
ClinicalTrials.gov Identifier:
First Posted: November 21, 2000
Last Update Posted: March 16, 2016
The safety and scientific validity of this study is the responsibility of the study sponsor and investigators. Listing a study does not mean it has been evaluated by the U.S. Federal Government. Read our disclaimer for details.
Information provided by:
National Heart, Lung, and Blood Institute (NHLBI)
To assess the population burden of occupational exposures in the prevalence and progression of chronic obstructive pulmonary disease (COPD).

Lung Diseases, Obstructive Chronic Obstructive Pulmonary Disease

Study Type: Observational

Further study details as provided by National Heart, Lung, and Blood Institute (NHLBI):

Study Start Date: September 2000
Study Completion Date: August 2004
Detailed Description:


Chronic obstructive pulmonary disease is the only one of the top four or five leading causes of death in the U.S. with worsening epidemiological trends. Cigarette smoking accounts for approximately 85 percent-90 percent of cases, but the other 10 percent-15 percent of the attributable risk still represents a substantial fraction of this disease that remains unexplained. Recently, several studies, in various countries, have addressed whether certain occupational exposures (primarily those relating to dusts, vapors, gases, and/or fumes) are potential risk factors for COPD. Most of these studies have shown elevated odds ratios or relative risks, although not always to a statistically significant level.


A population sample of the continental United States of those aged 55-75, supplemented by an enriched sample in geographic "hot spots" identified by the National Institute for Occupational Safety and Health (NIOSH) through respiratory diseases mapping. Structured telephone interviews assessed demographics, health status, smoking exposures, and occupational histories. High risk jobs were coded using a job matrix system independent of subject report of specific exposures. Two hundred thirty-four of those with COPD, with over-sampling of those with greater severity, were followed at 12-14 months to assess health status and health services utilization, as well as decrements in quality of life.

The study completion date listed in this record was obtained from the "End Date" entered in the Protocol Registration and Results System (PRS) record.


Information from the National Library of Medicine

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Ages Eligible for Study:   55 Years to 75 Years   (Adult, Senior)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   No
No eligibility criteria
  Contacts and Locations
Information from the National Library of Medicine

To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.

Please refer to this study by its ClinicalTrials.gov identifier (NCT number): NCT00006513

Sponsors and Collaborators
National Heart, Lung, and Blood Institute (NHLBI)
OverallOfficial: Paul Blanc University of California, San Francisco
  More Information

ClinicalTrials.gov Identifier: NCT00006513     History of Changes
Other Study ID Numbers: 949
R01HL067438 ( U.S. NIH Grant/Contract )
First Submitted: November 20, 2000
First Posted: November 21, 2000
Last Update Posted: March 16, 2016
Last Verified: January 2006

Additional relevant MeSH terms:
Lung Diseases
Lung Diseases, Obstructive
Pulmonary Disease, Chronic Obstructive
Respiratory Tract Diseases