Community Based Study on Occupational Asthma

To examine the occupations, industries and exposures in the work-place which were associated with a high risk for asthma and other adverse respiratory health effects, with particular emphasis on specific exposures of predominantly female occupations (irritants, detergents and other asthmagens), and of other high risk major occupations which had not been adequately examined.

Completed

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Key information

Conditions

Asthma Bronchial Diseases Hypersensitivity Hypersensitivity, Immediate Immune System Diseases Lung Diseases Lung Diseases, Obstructive Respiratory Hypersensitivity Respiratory Tract Diseases

Age range

20 year–44 year

Sex eligibility

All sexes

Study type

Observational

About this study

BACKGROUND:

Respiratory diseases are strongly related with exposure in the workplace. A considerable proportion of adult onset asthma is associated with these exposures. The importance of occupational risk factors for asthma has been underestimated, particularly among women. The occupational asthma study (ECRHS-OA) forms part of a wider international multicentre survey on respiratory health (European Community Respiratory Health Survey-ECRHS). The first phase of the ECRHS was conducted in 1991/92 and examined risk factors for asthma and atopy in subjects aged 20-44 years. The study updated (ECRHS-II), following-up approximately 17,000 young adults from 12 countries (Australia, Belgium, France, Germany, Iceland, Italy, Norway, Spain, Sweden, Switzerland, UK and USA).

The study provided valid and precise estimates on the importance of specific occupations, industries and exposures in relation to asthma incidence and prevalence, similar estimates for other respiratory symptoms and diseases and also for declines in pulmonary function.

DESIGN NARRATIVE:

Longitudinal, community-based, multicenter study. Those subjects who took part in the first occupational asthma study survey were re-contacted in 1999, to determine risk factors for incidence and remission of asthma, other respiratory symptoms, atopy, changes in bronchial responsiveness and lung function. Subjects were asked to perform a forced spirometry, methacholine challenge and to provide blood samples for IgE testing. A questionnaire administrated by trained interviewers was delivered requesting information on respiratory symptoms and diseases, socio-demographic factors, tobacco smoking, complete occupational history since the last survey, environmental exposures, family history, diet, treatment and use of health services. Modular occupational questionnaires were developed for subjects employed as cleaners, homemakers, welders, metal workers, nurses, and subjects exposed to organic dusts in the paper and textile industries.

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

Who can participate

Healthy volunteers accepted: No

Only the study team can determine whether someone qualifies for participation.

No eligibility criteria

Sponsors and collaborators

Lead sponsor

National Heart, Lung, and Blood Institute (NHLBI)

Nih

Registry information

Important dates

Study start: 1999
Study completion: 2003
First posted: May 26, 2000
Registry last updated: Mar 16, 2016

OpenTrials presents study information sourced from ClinicalTrials.gov. The official registry record should be consulted for the latest information.

View the official ClinicalTrials.gov record (opens in a new tab)

This listing is for discovery and informational purposes only. It is not medical advice, does not guarantee that a study is recruiting, and does not determine eligibility. Contact the study team and a qualified healthcare professional when considering participation.

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Completed