Antibiotics prescribed with evidence of lower respiratory consultation on the same day
Secondary
2) Time to first acute respiratory event
Respiratory-related consultation, not for annual monitoring review
3) Time to treatment failure
Prescription of additional chronic therapy (theophylline or other methylxanthines); maintenance OCS; PDE4 inhibitor; macrolides (e.g. azithromycin, erythromycin); mucolytics (e.g. carbocysteine, N-acetylcysteine); LTRA (nedocromil) AND/OR
An exacerbation (as defined above)
4) Time to first acute OCS course
5) Time to first antibiotics prescription with evidence of lower respiratory consultation, to avoid misclassification of antibiotics being prescribed for another reason [18]
Number of occurrences in the first 1-year outcome period of:
6) Exacerbations
7) Acute OCS courses
8) Antibiotic prescriptions with evidence of lower respiratory consultation
9) Acute respiratory events
10) mMRC score within 18 months after index date; ≥2 versus <2
11) Time to first pneumonia diagnosis
Chest radiography AND/OR
Diagnostic code
OCS: oral corticosteroid; PDE: phosphodiesterase; LTRA: leukotriene receptor antagonist; mMRC: modified Medical Research Council dyspnoea scale.