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Sputum in asthma.

M Turner-Warwick1, P Openshaw

  • 1Cardiothoracic Institute, London, UK.

Postgraduate Medical Journal
|January 1, 1987
PubMed
Summary
This summary is machine-generated.

Asthma patients often produce sputum, a symptom that can lead to underdiagnosis and undertreatment of asthma. Recognizing sputum production is key for accurate asthma and chronic bronchitis diagnosis.

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Area of Science:

  • Pulmonology
  • Respiratory Medicine

Background:

  • Asthma is often diagnosed based on airflow limitation, but sputum production is a common but sometimes overlooked symptom.
  • The relationship between sputum production, asthma severity, and co-existing chronic bronchitis requires further investigation.

Purpose of the Study:

  • To investigate the prevalence and characteristics of sputum production in patients with asthma.
  • To explore the association between sputum production, asthma severity, disability, and the presence of chronic bronchitis criteria.

Main Methods:

  • A detailed questionnaire on sputum production was administered to 130 patients meeting asthma criteria.
  • Patients' characteristics, including age at onset, skin test results, and symptom patterns, were recorded.
  • Asthma severity, disability, and fulfillment of MRC chronic bronchitis criteria were assessed.

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Main Results:

  • 79% of asthma patients reported sputum production, with 68% experiencing it constantly from onset.
  • Increased sputum volume correlated with more severe asthma, greater disability, and negative skin tests.
  • 43% met chronic bronchitis criteria, with 57% being non-smokers, indicating overlap between conditions.

Conclusions:

  • Asthma and chronic bronchitis are not mutually exclusive; sputum production can be a significant feature in asthma.
  • Regular sputum production in asthma patients may lead to underdiagnosis and undertreatment of asthma.
  • Clinicians should consider sputum production as a crucial diagnostic indicator in asthma management.