Sub-group: Severe asthma (according to the ATS workshop consensus definition of severe/refractory asthma, based on the level of prescribed medication criteria 2000)
An obligatory criteria of at least 12 month inhaler-therapy prescription of a combination of high dose corticosteroid +LABA (at least 12 inhalers of Symbicort 160/4.5 mcg OR at least 10 inhalers of Seretide 500 mcg, a year)
boolean
Prescription of SABA, either Ventolin OR Bricalin inhalers at least once a quarter of a year or at least 4 inhalers in 12 months OR at least one prescription a month of inhalation-solution of Ventolin or Bricalin a month.
boolean
Prescription of an oral or IM corticosteroid, at least twice in the last 12 months.
boolean
Sub-group: Treatment resistant severe asthma (Asthmatics that potentially have "difficult to treat severe asthma" due to co-morbidities or potential triggering factors).
Having computerized title-diagnosis of COPD, congestive heart failure, smoking, bronchiectasis, interstitial lung disease.
boolean
Prescription of an oral or topical (ocular) beta-blockers.
boolean