A Study in South Korea Using Medical Records to Look at Different Treatments for Chronic Obstructive Airway Disease (COPD)

CITRUS Study (Comparing the Incidence Between Tiotropium and ICS/LABA in Real World Use in South Korea)

Non-interventional, Single-country study based on existing data from medical records of COPD patients treated with LAMA or fixed dose combination of ICS/LABA

Inclusion Criteria:

• Diagnosed with COPD [based on ICD-10 code(J43.x-44.x except J430), as the primary or within the fourth secondary diagnosis and initiated LAMA or ICS/LABA more than twice a year from Jan 1, 2005 to Apr 30 2016].
• Age >55 years old

Exclusion Criteria:

• Prescription history with any long acting bronchodilator for maintenance therapy (the patient should be inhaler naïve)
• Prescription history with ipratropium bromide
• Prescription history with Leukotriene receptor antagonist(LTRA) or ICS
• Patients with lung cancer, IPF, ILD or lung transplantation at the time of COPD diagnosis