OOIR: Observatory of International Research

Papers

(The TQCC of Clinical Epidemiology is 8. The table below lists those papers that are above that threshold based on CrossRef citation counts [max. 250 papers]. The publications cover those that have been published in the past four years, i.e., from 2022-08-01 to 2026-08-01.)

Article	Citations
Comments on “Development and Validation of a META-Algorithm to Identify the Indications of Use of Biological Drugs Approved for the Treatment of Immune-Mediated Inflammatory Diseases from Claims Datab	87
Identifying Non-Steroidal Anti-Inflammatory Drug (NSAID) Users Among People with Osteoarthritis Through Administrative and Clinician-Reported Data – A Validation Study of 116,162 Patients	87
Hospitalization Endpoint in Clinical Trials of Outpatient Settings: using Anti-SARS-COV-2 Therapy as an Example	84
Using Routinely Collected Electronic Healthcare Record Data to Investigate Fibrotic Multimorbidity in England [Letter]	70
Modeling the Transmission Dynamics of COVID-19 Among Five High Burden African Countries	69
The DIAbetes MANagement and Treatment (DIAMANT) Cohort	66
Discriminative Ability of the Charlson Comorbidity Index for Long-Term Mortality in a General Population: Nationwide, Population-Based Study of 10 Million Adults in Sweden	65
On the Importance of a Clear Definition of Time Horizon for Time-to-Event Dynamic Predictions: A Systematic Review and a Concrete Illustration in Kidney Transplantation	55
Large Burden of Stroke Incidence in People with Cardiac Disease: A Linked Data Cohort Study	54
Burden of Carbon Monoxide Poisoning in Asian Countries From 1990 to 2021 and Its Projection Until 2030: An Analysis of the Global Burden of Disease Study 2021	49
The Impact of the COVID-19 Pandemic on Incidence and Short-Term Survival for Common Solid Tumours in the United Kingdom: A Cohort Analysis	45
Data-Driven Identification of Long-Term Glycemia Clusters and Their Individualized Predictors in Finnish Patients with Type 2 Diabetes	41
The Danish National Hospital Medication Register: A Resource for Pharmacoepidemiology	34
Initiation of Medical Therapy for Heart Failure Patients According to Kidney Function: A Danish Nationwide Study	34
Incidence of Graves’ Disease with Validation and Completeness of the Diagnosis for Registry Extracts in the Danish National Patient Register	30
Association of Prior Antithrombotic Drug Use with 90-Day Mortality After Intracerebral Hemorrhage	29
Response to “A Validation Study of the Danish ICD-10 Diagnosis Code K75.0 for Pyogenic Liver Abscess” [Response to Letter]	28
Cardiovascular Data Quality in the Danish National Patient Registry (1977–2024): A Systematic Review	28
Report on the Joint Workshop on the Relations between Health Inequalities, Ageing and Multimorbidity, Iceland, May 3–4, 2023	28
Cholesterol and Hypertension Treatment Improve Coronary Risk Prediction but Not Time-Dependent Covariates or Competing Risks	27
Risk of Second Primary Cancer Among Patients with Thyroid Carcinoma in Finland: A Nationwide Population-Based Study	27
Continued Use of Medications Withdrawn Internationally for Safety Concerns: Insights from an Urban Employed Population in China	26
Adverse Clinical Outcomes Attributable to Socioeconomic and Ethnic Disparities Among People with Type 2 Diabetes in New Zealand Between 1994–2018: A Multiple Linked Cohort Study	25
Association Between Pneumonia Risk and Anticholinergic Burden Among Patients with Different Frailty Levels [Response to Letter]	24
Sodium–Glucose Cotransporter 2 Inhibitors and Lower Risk of Depression in Population with Type 2 Diabetes Mellitus: A Population-Based Active Comparator, New-User Design	24

Hospital-Treated Infections and 15-year Incidence of Musculoskeletal Disorders: A Large Population-Based Cohort Study	23
Sensitivity of Administrative Coding for Heart Disease in Pregnancy	22
Potential of Health Insurance Claims Data to Predict Fractures in Older Adults: A Prospective Cohort Study	22
Trends in Abdominal Aortic Aneurysm Repair Incidence, Comorbidity, Treatment, and Mortality: A Danish Nationwide Cohort Study, 1996–2018	21
Validity of a Hypertrophic Cardiomyopathy Diagnosis in Adult Patients in the Danish National Patient Register	21
An Explainable Machine Learning Model to Predict Acute Kidney Injury After Cardiac Surgery: A Retrospective Cohort Study	21
Advancing an Algorithm for the Identification of Patients with High Data-Continuity in Electronic Health Records	21
Investigating Drug-Induced Thyroid Dysfunction Adverse Events Associated With Non-Selective RET Multi-Kinase Inhibitors: A Pharmacovigilance Analysis Utilizing FDA Adverse Event Reporting System Data	20
Mortality Outcomes in People with Lung Cancer with and without Type2 Diabetes: A Cohort Study in England	20
Prevalence of Statin Use and Predictors of Statin Initiation Among Patients with Alcohol-Related Cirrhosis - A Danish Nationwide Cohort Study	19
Time Trends in Male Breast Cancer Incidence, Mortality, and Survival in Austria (1983–2017)	19
Trajectories of Body Mass Index and Risk for Diabetes Complications and All-Cause Mortality in Finnish Type 2 Diabetes Patients	19
Implementing Multiple Imputation for Missing Data in Longitudinal Studies When Models are Not Feasible: An Example Using the Random Hot Deck Approach	18
Validation of a Diagnostic Model to Differentiate Multiple Myeloma from Bone Metastasis	18
Anticancer Drugs Compared to No Anticancer Drugs in Patients with Advanced Hepatobiliary Cancer: A Mapping Review and Evidence Gap Map	18
Timing of Core Sepsis Bundle Elements Initiation in Critically Ill Patients: A Multicenter Target Trial Emulation Study	16
Risks of Developing Diabetes and Hyperglycemic Crisis Following Carbon Monoxide Poisoning: A Study Incorporating Epidemiologic Analysis and Animal Experiment	16
Uneven Between-Hospital Distribution of Patient-Related Risk Factors for Adverse Outcomes of Colorectal Cancer Treatment: A Population-Based Register Study	16
Response to “A Validation Study of the Danish ICD-10 Diagnosis Code K75.0 for Pyogenic Liver Abscess” [Letter]	16
A Novel Biomarker Scoring System Alone or in Combination with the GRACE Score for the Prognostic Assessment in Non-ST-Elevation Myocardial Infarction	16
Ectopic Pregnancy Mortality Trends in BRICS: Age-Period-Cohort Analysis of Global Burden Disease 2021 Data and 2030 Forecast	15
Performance of Different Comorbidity Indices in Predicting Mortality in Danish Pancreatic Cancer Patients	15
Serum Prealbumin Levels and Risks of Adverse Clinical Outcomes After Ischemic Stroke	14
The Danish Atrial Fibrillation Registry: A Multidisciplinary National Pragmatic Initiative for Monitoring and Supporting Quality of Care Based on Data Retrieved from Administrative Registries	14
Incidence and Risk Factors of Lower Limb Deep Vein Thrombosis in Psychiatric Inpatients by Applying Machine Learning to Electronic Health Records: A Retrospective Cohort Study	14
Pregnancy Outcomes in Women with Type 1 Diabetes by Socioeconomic and Mental Health Disadvantages	14
Post-Marketing Safety Concerns with Efgartigimod alfa: A Pharmacovigilance Analysis Based on the Food and Drug Administration Adverse Event Reporting System Database	14
Self-Measured Blood Pressure Monitoring in Primary Care: Retrospective Analysis from a Large US Healthcare System	14
The Mediating Role of Body Mass Index in the Association Between Age at First Childbirth and Lung Function Among Chinese Postmenopausal Women	14
Comparing Methods for Classification of Hospital Visits in the Danish National Patient Registry (DNPR): DNPR3 Versus DNPR2	14
Validity of Algorithm for Classification of In- and Outpatient Hospital Contacts in the Danish National Patient Registry	14
Effects of Curative-Intent Treatments on Hepatocellular Carcinoma Survival in Alcohol-Related Cirrhosis: A Nationwide Study	14
Causes of Excess Mortality in Diabetes Patients Without Coronary Artery Disease: A Cohort Study Revealing Endocrinologic Contributions	14
Development and Validation of an Algorithm to Achieve Complete Registration of Danish Patients with Carcinoma In Situ of the Breast, 2008–2023	13
Survival in Thyroid Cancer in Sweden From 1999 To 2018	13
Healthcare Use Patterns for High Volume Musculoskeletal Shoulder Disorders: A Longitudinal Cohort from the US Military Health System	13
Effects of COVID-19 Pandemic and Lockdown on Monitoring and Treatment Balance of Finnish Coronary Heart Disease and Type 2 Diabetes Patients	13
The Mediation Role of Insulin Resistance and Chronic Systemic Inflammation in the Association Between Obesity and NAFLD: Two Cross-Sectional and a Mendelian Randomization Study	13
The Epidemiology of Bile Acid Diarrhea in Denmark [Letter]	13
10-Year Multimorbidity Trajectories in Older People Have Limited Benefit in Predicting Short-Term Health Outcomes in Comparison to Standard Multimorbidity Thresholds: A Population-Based Study	13
The Danish National Child Health Register	12
A New Drug Safety Signal Detection and Triage System Integrating Sequence Symmetry Analysis and Tree-Based Scan Statistics with Longitudinal Data	12
Statin Therapy in Early Breast Cancer: The MASTER Trial; A Randomized Phase III, Placebo-Controlled Comparison of Standard (Neo)Adjuvant Therapy Plus Atorvastatin versus Standard (Neo)Adjuvant Therapy	12
Neonatal Phototherapy and Clinical Characteristics: The Danish National Patient Registry 2000–2016	12
Postoperative Adverse Outcomes in Patients With Frailty Undergoing Urologic Surgery Among American Patients: A Propensity-Score Matched Retrospective Cohort Study	12
Using Restricted Mean Time Lost to Evaluate the Prognostic Effects on Locally Advanced Breast Cancer Considering Competing Risks	11
Variation in Psychometric Testing in General Practice – A Nationwide Cohort Study	11
Knowledge, Perceptions and Reporting Practices of Theoretical Design in Causal Observational Epidemiological Studies on the Role of Antibiotic Use in the Occurrence of Asthma in Children	11
Association Between Medication Adherence and Risk of COPD in Adult Asthma Patients: A Retrospective Cohort Study in Canada	11
A Validated Algorithm for Register-Based Identification of Patients with Relapse of Clinical Stage I Testicular Cancer	11

Agreement Between Self-Reported Information and Health Register Data on Chronic Diseases in the Oldest Old	11
Risk of Depression and Anxiety in Those Who Gave Birth to Children Who Developed Invasive Group B Streptococcal Disease: A Population-Based Cohort Study	11
Impact of Changes in Patient Reported Outcomes on Healthcare Use After a Self-Management Supportive Intervention for Individuals with Low Back Pain	11
Transforming the Information System for Research in Primary Care (SIDIAP) in Catalonia to the OMOP Common Data Model and Its Use for COVID-19 Research	10
Prevalence and Data-Driven Exploration of Pre-Diagnostic Symptoms and Features of Gilbert’s Syndrome in the UK Primary Care Population	10
Community Use of Repurposed Drugs Before and During COVID-19 Pandemic in the Netherlands: An Interrupted Time-Series Analysis	10
Registration of Amyotrophic Lateral Sclerosis: Validity in the Danish National Patient Registry	10
Can Lipid-Lowering Drugs Reduce the Risk of Cholelithiasis? A Mendelian Randomization Study	10
Treatment of Proximal Humeral Fractures in Older Patients During COVID-19 Pandemic in Germany	10
Regression Discontinuity Designs in Epidemiology: A Practical Guide	10
Epidemiology of Invasive Candidiasis	10
Assessing the Accuracy of Symptoms and Adverse Events Reporting for Lung Cancer Treatment in the Danish National Patient Registry	10
Serious Mental Illness Exacerbation Post-Bereavement: A Population-Based Study of Partners and Adult Children	10
Predictors, Healthcare Utilization and Costs Related to Short-Term Stays in Patients with COPD: A Registry-Based Analysis in Norway	9
Burden of Gastrointestinal Tumors in Asian Countries, 1990–2021: An Analysis for the Global Burden of Disease Study 2021	9
Identification of Drugs Associated with Lower Risk of Parkinson’s Disease Using a Systematic Screening Approach in a Nationwide Nested Case–Control Study	9
Cohort Profile: The Danish Venous Thromboembolism Cohort – A Linkage Between Danish National Health Surveys and Health Registers	9
Incidence of Carpal Tunnel Syndrome Requiring Surgery May Increase in Patients Treated with Trigger Finger Release: A Retrospective Cohort Study	9
Adaptation of the Charlson Comorbidity Index for Register-Based Research in Sweden [Corrigendum]	9
Estimation of Personal Symptom Networks Using the Ising Model for Adult Survivors of Childhood Cancer: A Simulation Study with Real-World Data Application	8
Occupational Physical Activity Among Pregnant Employees in the Danish Workforce: The PRECISE Occupational Cohort Profile	8
Applicability of Vasopressor Trials in Adult Critical Care: A Prospective Multicentre Meta-Epidemiologic Cohort Study	8
Validation of Medication Proxies for the Identification of Hospitalizations for Major Adverse Cerebro-Cardiovascular Events	8
Validation of the ICD-10 Diagnoses of Early-Onset Neonatal Infection in the Danish National Patient Register from 2010 to 2018	8
Obituary – Anders Ekbom	8
Association of Birthweight Discordance with Adverse Birth Outcomes Among Live-Born Twins: A Multi-Center Study in China	8
The Hydrocephalus Association Patient-Powered Interactive Engagement Registry (HAPPIER): Design and Initial Baseline Report	8
Implementation of Day Surgery in Denmark Compared with Benchmarks from the United Kingdom: A Nationwide Register-Based Cohort Study	8
Feedback on “Recording of Alcohol Use Disorder in Electronic Health Records: Developing a Recommended Codelist for Research” [Letter]	8
A Novel Chronic Kidney Disease Phenotyping Algorithm Using Combined Electronic Health Record and Claims Data	8
Association Between Lipid Profile and Risk of Incident Systemic Sclerosis: A Nationwide Population-Based Study	8
Routine Clinical Care Creatinine Data in Denmark – An Epidemiological Resource for Nationwide Population-Based Studies of Kidney Disease	8