F.Y.I
Differences between asthma and COPD (brief)
Asthma COPD
Age usually <40 yrs usually >40yrs
Smoking history non-causal causal
Disease course stable progressive worsening
Allergies often infrequent
Sputum production infrequent often
Clinical symptoms intermittent & variable persistent
Spirometry often normalise may improve but
never normalise
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