Nighttime symptoms occur less than two times a month.
Nighttime symptoms occur greater than two times a month. This group of children has symptoms every day, use their rescue medication every day, may have activity levels affected by the flare-ups, and have exacerbations greater than or equal to two times a week. Nighttime symptoms occur greater that one time a week. This group of children has symptoms constantly, have a decrease in their physical activity, and have frequent flare-ups. Nighttime symptoms occur frequently.