Table 3 Asthma severity grade definition.
From: Phenotypic and genetic heterogeneity in a genome-wide linkage study of asthma families
Severity grade | Frequency and percentage in asthmatic children | Clinical criteria | ||
|---|---|---|---|---|
Attacks (last 12 months) | Asthma medication (last 12 months) | At least 1 overnight hospital stay | ||
1 | 29 (7.2%) | none | none | none |
2 | 118 (29.3%) | none | none | yes |
none | yes | none | ||
3 | 164 (40.8%) | none | yes | yes |
once/month | yes | none | ||
4 | 72 (17.9%) | once/month | yes | yes |
at least once/month | yes | none | ||
5 | 19 (4.7%) | at least once/month | yes | yes |