Study population and data collection using the Observational
Medical Outcomes Partnership Common Data Model (OMOP-CDM)
A single-center long-term cohort study using the OMOP-CDM was used for a
retrospective analysis of clinical data from Hallym University, Kangdong
Sacred Heart Hospital, Seoul, South Korea. Patient-level data were
transformed into a common data format that enabled identical study
execution. De-identified data were from electronic medical records and
were transformed into the OMOP-CDM format.19 The
Institutional Review Board of Hallym University provided approval for
the analysis (IRB 2019-09-005).