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Table 2 Asthma Control Criteria

From: 2003 Canadian Asthma Consensus Guidelines Executive Summary

Parameter

Frequency or Value

Daytime symptoms

<4 days/week

Nighttime symptoms

<1 night/week

Physical activity

Normal

Exacerbations

Mild, infrequent

Absence from work or school, due to asthma

None

Need for β2-agonist, prn

<4 doses/week*

FEV1 or PEF

≥90% of "personal best"

PEF diurnal variation†

<10-15%

  1. Adapted from Boulet LP et al. [3]
  2. FEV1 = forced expiratory volume in 1 second; PEF = peak expiratory flow; prn = pro ne rata (as needed).
  3. *Introduction of inhaled corticosteroids should be considered early, even for those who report asthma symptoms fewer than three times per week and appear to have adequate control, based on these criteria. One dose per day may be used, to prevent exercise-induced symptoms.
  4. †Calculated as the highest PEF minus the lowest, divided by the highest PEF × 100 for morning and night (determined over a 2-week period).
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Allergy, Asthma & Clinical Immunology

ISSN: 1710-1492

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