Table 1Classification of asthma1

Daytime symptomsNighttime symptomsShort-Acting Beta-2 Agonist useInterference with daily activityFEV1 % predictedFEV1/FVC
Intermittent≤ 2 days/week≤ 2 nights/month≤ 2 days/weekNone> 80%Normal
Mild> 2/week but < 1/day3–4 nights/month> 2 days/weekMinor≥ 80%Normal
ModerateDaily> 1 night/week but < 1/nightDailySome> 60% – < 80%Reduced 5%
SevereContinualFrequentSeveral times dailyExtreme≤ 60%Reduced > 5%

From: Introduction

Cover of Drug Class Review: Controller Medications for Asthma
Drug Class Review: Controller Medications for Asthma: Final Update 1 Report [Internet].
Jonas DE, Wines RCM, DelMonte M, et al.
Portland (OR): Oregon Health & Science University; 2011 Apr.
Copyright © 2011 by Oregon Health & Science University.

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