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The Danish National Patient Registry: a review of content, data quality, and research potential
Background The Danish National Patient Registry (DNPR) is one of the world’s oldest nationwide hospital registries and is used extensively for research. Many studies have validated algorithms forExpand
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The Danish Civil Registration System as a tool in epidemiology
The methodological advances in epidemiology have facilitated the use of the Danish Civil Registration System (CRS) in ways not previously described systematically. We reviewed the CRS and its use asExpand
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The Danish National Birth Cohort - its background, structure and aim
Background: It is well known that the time from conception to early childhood has importance for health conditions that reach into later stages of life. Recent research supports this view, andExpand
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The Nordic countries as a cohort for pharmacoepidemiological research.
The Nordic countries have a long tradition of registry-based epidemiological research. Many population-based health registries were established in the 1960s, with use of unique personal identifiersExpand
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Prognosis of cancers associated with venous thromboembolism.
BACKGROUND Little is known about the prognosis of cancer discovered during or after an episode of venous thromboembolism. METHODS We linked the Danish National Registry of Patients, the DanishExpand
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The predictive value of ICD-10 diagnostic coding used to assess Charlson comorbidity index conditions in the population-based Danish National Registry of Patients
BackgroundThe Charlson comorbidity index is often used to control for confounding in research based on medical databases. There are few studies of the accuracy of the codes obtained from theseExpand
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Incidence of adenocarcinoma among patients with Barrett's esophagus.
BACKGROUND Accurate population-based data are needed on the incidence of esophageal adenocarcinoma and high-grade dysplasia among patients with Barrett's esophagus. METHODS We conducted aExpand
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Risk of cancer in a large cohort of nonaspirin NSAID users: a population-based study
There is increasing evidence of an inverse association between use of nonsteroidal anti-inflammatory drugs (NSAIDs) and risk of colorectal cancer. However, data regarding other cancer sites areExpand
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The risk of a diagnosis of cancer after primary deep venous thrombosis or pulmonary embolism.
BACKGROUND Several small studies have indicated an association between deep venous thrombosis or pulmonary embolism and a subsequent diagnosis of cancer, but the subject is controversial. METHODSExpand
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Use of selective serotonin reuptake inhibitors and risk of upper gastrointestinal tract bleeding: a population-based cohort study.
BACKGROUND Selective serotonin reuptake inhibitors (SSRIs) have been suspected of increasing the risk of bleeding. We examined the risk of upper gastrointestinal tract (GI) bleeding with use ofExpand
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