Clinical Epidemiology of Asthma in An HMO

This study has been completed.
Sponsor:
Information provided by:
National Heart, Lung, and Blood Institute (NHLBI)
ClinicalTrials.gov Identifier:
NCT00005291
First received: May 25, 2000
Last updated: June 23, 2005
Last verified: June 2000

May 25, 2000
June 23, 2005
July 1988
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Complete list of historical versions of study NCT00005291 on ClinicalTrials.gov Archive Site
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Clinical Epidemiology of Asthma in An HMO
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To provide information on morbidity and health care utilization for asthma for a large, well-defined population over a 20 year period.

BACKGROUND:

Asthma is the second most common chronic respiratory disorder seen by physicians in outpatients, and in 1988 was estimated to be the primary or secondary cause of 9.3 percent of all physician office visits for ambulatory medical care in the United States. Reports citing increased asthma morbidity and mortality in this country and abroad have intensified interest in this disorder. Investigations into possible explanations for these increases, however, have been hampered by the lack of good longitudinal data on the incidence, prevalence, and health care utilization associated with asthma, and by the lack of generally accepted diagnostic criteria for defining the disease.

DESIGN NARRATIVE:

Use of the Kaiser-Permanente Northwest Region data base allowed an examination of the secular trends in the prevalence and incidence of physician-diagnosed asthma and asthma-like disorders in inpatient and outpatient populations over a 20 year period, health care utilization and temporal changes in utilization patterns for asthma, and the natural history of asthma in selected subpopulations. Demographic factors examined were limited to age and sex.

Observational
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  • Asthma
  • Lung Diseases
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*   Includes publications given by the data provider as well as publications identified by ClinicalTrials.gov Identifier (NCT Number) in Medline.
 
Completed
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April 1993
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No eligibility criteria

Male
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No
Contact information is only displayed when the study is recruiting subjects
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NCT00005291
2013
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National Heart, Lung, and Blood Institute (NHLBI)
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National Heart, Lung, and Blood Institute (NHLBI)
June 2000

ICMJE     Data element required by the International Committee of Medical Journal Editors and the World Health Organization ICTRP