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Asthma Classification Guidelines

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The 2007 National Asthma Education and Prevention Program Expert Panel Report 3 Guidelines for the Diagnosis and Management of Asthma uses the severity of asthma classification below, with features of asthma severity divided into three charts to reflect classification in different age groups (0-4 y, 5-11 y, and 12 y and older). Classification includes: intermittent asthma, mild persistent asthma, moderate persistent asthma, and severe persistent asthma.

IntermittentMild PersistentModerate PersistentSevere Persistent
cough, wheezing, chest tightness, or difficulty breathing less than twice a weekcough, wheezing, chest tightness, or difficulty breathing 3–5 a weekcough, wheezing, chest tightness, or difficulty breathing dailycough, wheezing, chest tightness, or difficulty breathing that are continual
flare-ups are brief, but intensity may veryflare-ups may affect activity levelflare-ups may affect activity level 
nighttime symptoms less than twice a monthnighttime symptoms 3–5 times a monthnighttime symptoms 5 or more times a monthfrequent nighttime symptoms
no symptoms between flare-ups   
lung function test FEV is 80% or more above normal valueslung function test FEV is 80% or more above normal valueslung function test FEV is above 60% but below 80% of normal valueslung function test FEV is 60% or less of normal values
peak flow has less than 20% variability am-to-am or am-topm, day-to-daypeak flow has less than 20-30% variabilitypeak flow has more than 30% variabilitypeak flow has more than 30% variability

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