Inclusion Criteria:
The study cohort will include all patients who initiate Tiotropium/ Olodaterol (Tio/Olo) or Tiotropium (Tio) during the patient selection period.
Exclusion Criteria:
The following exclusion criteria will then be applied to generate the unmatched cohort:
- Aged <40 years on cohort entry.
- Any LAMA, LABA, or ICS maintenance therapy (alone or in combination) during the 180-day baseline period prior to cohort entry for maintenance treatment and duration >30 days, or any prescription within the 30 days prior to cohort entry.
- Patients without continuous enrolment (days since first inpatient/ outpatient encounter in the data) during the baseline period.
- No prior diagnosis of COPD [International Classification of Diseases (ICD)-10: J41*, J43*, J44* and doubt (UTAGAIFLG) = 0 (no)]
- Patients without a second prescription claim of their index medication within 60 days after the cohort entry date.
- Diagnosis of asthma [ICD-10: J45* and doubt (UTAGAIFLG) = 0 (no)] during the baseline period.
- Diagnosis of lung cancer [ICD-10: C34*, D02.2, Z80.1, Z85.1 and doubt (UTALAIFLG) = 0 (no)] or lung transplant (Health claim code: 150317670, 150322510, 150322610, 150336510, 150336610, 150336710, 150399270) prior to the cohort entry date using all available data.
- Patients who initiate both Tio/Olo and Tio simultaneously on the cohort entry date.
- Any use of triple therapy (LAMA + LABA + ICS) during the baseline period or between the cohort entry date and 1 day prior to the start of follow-up.