ReviewClinical epidemiology2015
The Danish National Patient Registry: a review of content, data quality, and research potential.
Review in Clinical epidemiology, 2015. The graph could read no effect estimate from its abstract, so it casts no vote on the map. It is linked to trial NCT03142139 (Timing of Vaccination With the Non-live DTaP-IPV-Hib Vaccine and Development of Atopic Dermatitis Before 1 Year of Age - a Danish Register Based Cohort Study), which is not on this map. Cited by 2,286 papers, 2 of them syntheses that pooled it.
What it found
Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.
The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
The trial behind it
Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.
Timing of Vaccination With the Non-live DTaP-IPV-Hib Vaccine and Development of Atopic Dermatitis Before 1 Year of Age - a Danish Register Based Cohort Study
Who cites it
2,286 citing papers in PubMed, 2 syntheses or guidelines pooled it.
- Incidence, Temporal Trends, and Surgical Shift of Achilles Tendon Rupture: A Systematic Review and Meta-analysis.Sports medicine (Auckland, N.Z.) · 2026Pooled it
- Machine Learning Based Diagnostic Models for Hip and Knee Prosthetic Joint Infection: A Systematic Review.Journal of orthopaedic research : official publication of the Orthopaedic Research Society · 2026Pooled it
- Trial
- Relative effectiveness of high-dose versus standard-dose influenza vaccine against hospitalizations and mortality according to Charlson Comorbidity Index: A post-hoc analysis of the DANFLU-1 randomized trial.European journal of clinical microbiology & infectious diseases : official publication of the European Society of Clinical Microbiology · 2026Trial
- Out-of-hours services in Zealand, Denmark. Consequences of changeover from GP-cooperative to integrated deputized services. A retrospective cohort study.Scandinavian journal of primary health care · 2026Article
- Older immigrants' use of general practice in Denmark a register-based cohort study.Scandinavian journal of primary health care · 2026Article
- Task shifting from general practitioners to nurses and the association with patient flow and resource use in out-of-hours primary care clinics: a descriptive register-based study.Scandinavian journal of primary health care · 2026Article
- Predicting future risk of type 1 and type 2 diabetes after gestational diabetes mellitus using polygenic scores: a cohort study.Diabetologia · 2026Observational
- Subacute Thyroiditis in Denmark: A Nationwide Study of 1763 Cases.Clinical endocrinology · 2026Article
- Investigating Potential Adverse Drug Reactions of Lisdexamfetamine Using Sequence Symmetry Analysis.Basic & clinical pharmacology & toxicology · 2026Article
- Chronic pain and aesthetics after cosmetically motivated open primary ventral hernia repair: a survey- and register-based nationwide study.Hernia : the journal of hernias and abdominal wall surgery · 2026Article
- Article
- Interaction between mental health conditions and hip fracture on the 30-day risk of infection among older adults: a Danish matched cohort study.European geriatric medicine · 2026Article
- Denosumab-efficacy, safety, persistence and sequential strategies-a systematic review.Osteoporosis international : a journal established as result of cooperation between the European Foundation for Osteoporosis and the National Osteoporosis Foundation of the USA · 2026Review
- Incidence and Mortality of Community-Acquired Sepsis or Bacteraemia in Patients With Alcohol-Related Cirrhosis.Liver international : official journal of the International Association for the Study of the Liver · 2026Article
- Mosaic chromosomal alterations and relation to haematological cancer in two large Danish cohorts.British journal of haematology · 2026Article
- Long-term incidence of infective endocarditis according to the type of cardiac implantable electronic device: a nationwide comparison with moderate- and high-risk patient groups.Europace : European pacing, arrhythmias, and cardiac electrophysiology : journal of the working groups on cardiac pacing, arrhythmias, and cardiac cellular electrophysiology of the European Society of Cardiology · 2026Article
- The role of socioeconomic status and pre-pregnancy BMI in postpartum psychiatric episodes - a mediation study.Social psychiatry and psychiatric epidemiology · 2026Article
- Regional Variation in ADHD Treatment and Diagnosis Among Children and Adolescents in Denmark.Basic & clinical pharmacology & toxicology · 2026Article
- Long-Term Follow-Up Incidence of Type 1 Diabetes and Associated Autoimmune Diseases in First-Degree Relatives.Diabetes, obesity & metabolism · 2026Article
2,226 more citing papers are in PubMed but not listed here.
Corrections and comments
PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.
Authors and funding
6 authors.
Funding
No grant is acknowledged in the PubMed record.
Abstract
backgroundThe 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 for identifying health events in the DNPR, but the reports are fragmented and no overview exists.
objectivesTo review the content, data quality, and research potential of the DNPR.
methodsWe examined the setting, history, aims, content, and classification systems of the DNPR. We searched PubMed and the Danish Medical Journal to create a bibliography of validation studies. We included also studies that were referenced in retrieved papers or known to us beforehand. Methodological considerations related to DNPR data were reviewed.
resultsDuring 1977-2012, the DNPR registered 8,085,603 persons, accounting for 7,268,857 inpatient, 5,953,405 outpatient, and 5,097,300 emergency department contacts. The DNPR provides nationwide longitudinal registration of detailed administrative and clinical data. It has recorded information on all patients discharged from Danish nonpsychiatric hospitals since 1977 and on psychiatric inpatients and emergency department and outpatient specialty clinic contacts since 1995. For each patient contact, one primary and optional secondary diagnoses are recorded according to the International Classification of Diseases. The DNPR provides a data source to identify diseases, examinations, certain in-hospital medical treatments, and surgical procedures. Long-term temporal trends in hospitalization and treatment rates can be studied. The positive predictive values of diseases and treatments vary widely (<15%-100%). The DNPR data are linkable at the patient level with data from other Danish administrative registries, clinical registries, randomized controlled trials, population surveys, and epidemiologic field studies - enabling researchers to reconstruct individual life and health trajectories for an entire population.
conclusionThe DNPR is a valuable tool for epidemiological research. However, both its strengths and limitations must be considered when interpreting research results, and continuous validation of its clinical data is essential.
Indexed as
Identifiers
What OpenQuestion holds
Registered trials
Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.