Assessing the Occupation Burden in COPD

Completed

• Conditions: Lung Diseases, Obstructive; Chronic Obstructive Pulmonary Disease

• Registration Number: NCT00006513
• Lead Sponsor: National Heart, Lung, and Blood Institute (NHLBI)

Brief Summary

To assess the population burden of occupational exposures in the prevalence and progression of chronic obstructive pulmonary disease (COPD).

Detailed Description

BACKGROUND:

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.

DESIGN NARRATIVE:

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.

Study Timeline

• Study Start: 2000-09
• Study First Submitted: 2000-11-20
• Study First Submitted QC: 2000-11-20
• Study First Posted: 2000-11-21
• Study Completion: 2004-08
• Status Verified: 2006-01
• Last Update Submitted: 2016-03-15
• Last Update Posted: 2016-03-16

Recruitment & Eligibility

• Status: COMPLETED
• Sex: All
• Target Recruitment: Not specified

Inclusion Criteria

Not provided

Exclusion Criteria

Not provided

Study & Design

• Study Type: OBSERVATIONAL
• Study Design: Not specified