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NIH Classification of Asthma Severity
| Mild Persistent | Moderate Persistent | |
|---|---|---|
| Report symptoms | >2 times/week but<1time/day | Daily |
| Report night time symptoms | >2 times/month | >1 time/week |
| Asthma Exacerbation | Exacerbation may affect activity | Exacerbations affect activity |
| FEV1 | ≥80% of Predicted | >60% to <80% of Predicted |
| PEF variability | 20 to 30% | >30% |
FEV1 = Forced expiratory volume in one second
PEF = Peak expiratory flow
