… the study, and a description of the data sources and variables needed. Individual study data
are available to … Access to registry data in Denmark for research purposes does not require …

… of the available data sources is presented. This review discusses the data quality of each
type of medical … It is shown, from an epidemiological point of view, how Denmark’s population …

… , with more than 200 registries and databases in Denmark alone. … other registries, databases,
and biobanks available for research. … data sources, which also secures high completeness. …

… registers, and linkage through the Danish Civil Registration System (CRS) can provide
information from National Health registries which keep information on disease, … existing research …

… of the data sources is provided below and an overview of data sources available for the
relevant study … CPR serves as the key to accurately link data from multiple data sources on an …

… However, only a few minor studies have validated inflammatory bowel disease (IBD) … To
pave the way for large-scale studies of IBD in Denmark, we aimed to investigate … Data Sources …

… , and between registries and other data sources [1–8]. Many of the registries include total
populations over long time periods. Thus, study populations in registry-based epidemiology …

… mandatory reporting via the health care system. Therefore, the data of all Danish patients is
known and … on novel treatment options, current clinical trials and research results available to …

… diagnoses and only validated patients with available EMR records. This may have resulted
in … Our results can provide guidance for the future use of these data sources for research (eg, …

… conducted a register-based study on Danish national data to … this is not traceable in our data
sources. Limitations to our … or renal disease is more suggestive of a genetic disease such as …