Annotations Classify Asthma Severity

Classify Asthma Severity

Classification of asthma severity should be per recommendations of the NAEPP Expert Panel Report Guidelines for the Diagnosis and Management of Asthma. Refer to their website for additional information.

Classification of Asthma Severity


Nighttime Symptoms

Lung Function

Mild Intermittent 

▪ Symptoms ≤ 2 times a week▪ Asymptomatic and normal PEF between exacerbations▪ Exacerbations brief (hours to days), intensity may vary

≤ 2 times a month

▪ FEVI or PEF ≥ 80% predicted▪ PEF variability < 20%

Mild Persistent 

▪ Symptoms ≥ 2 times a week but < 1 time a day▪ Exacerbations may affect activity

≥ 2 times a month

▪ FEV1 or PEF ≥ 80% predicted▪ PEF variability 20-30%

Moderate Persistent 

▪ Daily symptoms▪ Daily use of inhaled short-acting beta2-agonist▪ Exacerbations affect activity▪ Exacerbations ≥ 2 times a week; may last days

> 1 time a week

▪ FEV1 or PEF > 60% or < 80% predicted▪ PEF variability > 30%

Severe Persistent 

▪ Continual symptoms▪ Limited physical activity▪ Frequent exacerbations


▪ FEVI or PEF ≤ 60% predicted▪ PEF variability > 30%

These guidelines do not establish a standard of care to be followed in every case. It is recognized that each case is different and those individuals involved in providing health care are expected to use their judgment in determining what is in the best interests of the patient based on the circumstances existing at the time. It is impossible to anticipate all possible situations that may exist and to prepare guidelines for each. Accordingly these guidelines should guide care with the understanding that departures from them may be required at times.

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