GOLD Severity
Mild >80%, Mod 50-80, Severe 30-50
Severity FEV1 Asthma
Mild >80, Mod 60-80, Severe <60
Impairment: Intermittent
up to 2 days a week symptoms
Impairment: Persistent
Mild >2 days/wk, Mod Daily, Severe throughout the day
Target SpO2
1 60-65 2 65-70 3 70-75 4 75-80 5 80-85 10 85-95