PMID: 9529708Apr 8, 1998Paper

Asthma diagnosis by spirometry. Sensitive or specific?

Australian Family Physician
D King

Abstract

Spirometry is the recommended first-line investigation for diagnosing asthma, with greater than 15% improvement in FEV1 considered diagnostic. However, evidence suggests a majority of asthmatics may go undetected at 15%, thus a lower diagnostic value may be preferred.

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