Your asthma classification

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Your asthma classification can change over time depending on how well

symptoms are controlled. Your doctor will prescribe medicine and

develop your Asthma Action Plan based on your asthma classification.

These are some of the common symptoms and how they fit with different

asthma classifications.

Mild Intermittent Asthma

symptoms two or fewer times a week

normal peak flow between flare-ups

flare-ups brief, intensity varies

nighttime symptoms that wake you two or fewer times a month

FEV1 or peak flow greater than or equal to 80% predicted

peak flow varies less than 20% (the difference between morning and

afternoon readings is less than 20%)

Mild Persistent Asthma

symptoms more than two times a week but fewer than once a day

flare-ups may limit activity

nighttime symptoms that wake you more than twice a month

FEV1 or peak flow greater than or equal to 80% predicted

peak flow varies from 20% to 30% (the difference between morning and

afternoon readings is between 20% and 30%)

Moderate Persistent Asthma

symptoms daily; use of short-acting beta-agonists daily

flare-ups two or more times a week that limit activity

symptoms at night that wake you more than once a week

FEV1 or peak flow greater than 60% and less than 80% predicted

peak flow variability is greater than 30% (the difference between

morning and afternoon readings is more than 30%)

Severe Persistent Asthma

symptoms constant and limit activity

flare-ups frequent during day and night

FEV1 or peak flow equal to or less than 60% predicted

peak flow variability greater than 30% (the difference between

morning and afternoon readings is more than 30%)