Clinical Epidemiology

Using Routinely Collected Electronic Healthcare Record Data to Investigate Fibrotic Multimorbidity in England [Response to Letter]
Massen GM and Quint JK
The Danish Centre for Strategic Research in Type 2 Diabetes (DD2) Project Cohort and Biobank from 2010 Through 2023-A Cohort Profile Update
Kristensen FPB, Nicolaisen SK, Nielsen JS, Christensen DH, Højlund K, Beck-Nielsen H, Rungby J, Friborg SG, Brandslund I, Christiansen JS, Vestergaard P, Jessen N, Olsen MH, Andersen MK, Hansen T, Brøns C, Vaag A, Thomsen RW and Sørensen HT
This paper provides an overview of the Danish Centre for Strategic Research in Type 2 Diabetes (DD2) cohort and biobank, including baseline characteristics of participants enrolled up to 2023, and post-enrollment rates of cardiovascular disease outcomes and mortality.
Recording of Alcohol Use Disorder in Electronic Health Records: Developing a Recommended Codelist for Research
Cook S, Osborn D, Maini A, Parekh R, Gnani S, Beaney T, Neves AL, Saxena S and Quint JK
Electronic health records (EHR) are valuable resources for health research; however, their use is challenging. A validated alcohol use disorder (AUD) codelist for UK primary care is needed to improve population-based research in this patient group. We aimed to develop an AUD codelist for use in the Clinical Practice Research Datalink (CPRD) Aurum database, a UK EHR primary-care database.
Survival in Thyroid Cancer in Sweden From 1999 To 2018
Zitricky F, Koskinen A, Sundquist K, Sundquist J, Liska V, Försti A, Hemminki A and Hemminki K
Thyroid cancer (TC) is diagnosed in several histological types which differ in their clinical characteristics and survival. We aim to describe how they influence TC survival in Sweden.
Using Routinely Collected Electronic Healthcare Record Data to Investigate Fibrotic Multimorbidity in England [Letter]
Wijaya A, Suryandari ESDH, Sakti DAK, Hariez TM and Seha HN
Ibuprofen for Acute Pericarditis and Associated Cardiovascular Risks: A Danish Nationwide, Population-Based Cohort Study
Eika JK, Bonnesen K, Pedersen L, Ehrenstein V, Sørensen HT and Schmidt M
Ibuprofen is used to treat acute pericarditis, but high-dose ibuprofen has also been associated with increased cardiovascular risks. We examined the cardiovascular safety of using ibuprofen for acute pericarditis.
Harmonized Data Quality Indicators Maintain Data Quality in Long-Term Safety Studies Using Multiple Sclerosis Registries/Data Sources: Experience from the CLARION Study
Hillert J, Butzkueven H, Magyari M, Wergeland S, Moore N, Soilu-Hänninen M, Ziemssen T, Kuhle J, Pontieri L, Forsberg L, Aarseth JH, Zhu C, Sicignano N, Mushnikov V, Bezemer I and Sabidó M
Understanding the long-term safety of disease-modifying therapies for multiple sclerosis (MS) in routine clinical practice can be undertaken through registry-based studies. However, variability of data quality across such sources poses the challenge of data fit for regulatory decision-making. CLARION, a non-interventional cohort safety study of cladribine tablets, combines aggregated data from MS registries/data sources, except in Germany (which utilizes primary data collection). We describe the application of key data quality indicators (DQIs) within CLARION to evaluate data quality over time, as recommended by the European Medicines Agency (EMA) guideline on registry-based studies.
Impact of Smoking Reduction Scenarios on the Burden of Myocardial Infarction in the French Population Until 2035
Kuhn J, Olié V, Grave C, Le Strat Y, Bonaldi C and Joly P
Myocardial infarction (MI) is a cardiovascular disease caused by necrosis of the myocardium, which places a heavy burden on patients. In France, the proportion of daily smokers remains high, reaching at 25.5% in 2020. We evaluated the impact of smoking reduction scenarios on the projection of MI prevalence, mean age of incident cases and number of MI prevented cases until 2035.
Validity of a Hypertrophic Cardiomyopathy Diagnosis in Adult Patients in the Danish National Patient Register
Severinsen T, Gudmundsdottir HL, Axelsson Raja A, Fosbøl EL, Bundgaard H and Thune JJ
To assess the positive predictive value (PPV) of the diagnostic codes for hypertrophic cardiomyopathy (HCM) in the Danish National Patient Register (DNPR) and identify factors affecting the PPV.
Validating ICD-10 Diagnosis Codes for Guillain-Barré Syndrome in Taiwan's National Health Insurance Claims Database
Hsieh CY, Chen PT, Shao SC, Lin SJ, Liao SC and Lai EC
To validate the International Classification of Diseases, 10th Revision (ICD-10) codes for Guillain-Barré syndrome (GBS) in Taiwan's insurance claims database.
Assessing the Role of Serum Prealbumin in Prognostic Studies of Stroke: Reflections on Existing Research Methods [Letter]
Hong C, Ma Y and Yan C
Causal Association Between Heart Failure and Sepsis: Insights from Mendelian Randomization and Observational Studies
Liu L, Huang P, Wang C, Liu Y, Gao Y and Yu K
We aimed to identify the association between heart failure (HF) with sepsis and its mortality through Mendelian randomization (MR) and observational studies.
Gender-Specific Survival of Nasopharyngeal Carcinoma in Endemic and Non-Endemic Areas Based on the US SEER Database and a Chinese Single-Institutional Registry
Guo LF, Dai YQ, Yu YF and Wu SG
To investigate the prognostic implications of gender in nasopharyngeal carcinoma (NPC) utilizing data from two independent cohorts: the Xiamen (XM)-NPC cohort (an endemic area in China) and the United States Surveillance, Epidemiology, and End Results (SEER)-NPC cohort (a non-endemic area).
Excess Risk of Mortality and Hospitalization in Patients with Heart Failure According to Age and Comorbidity - A Nationwide Register Study
Madelaire C, Gerds T, Køber L, Gustafsson F, Andersson C, Kristensen SL, Butt JH, Zahir Anjum D, Banke A, Fosbøl EL, Gislason G, Torp-Pedersen C and Schou M
Heart failure (HF) is associated with increased risk of death and a hospitalization, but for patients initiating guideline directed medical therapy, it is unknown how high these risks are compared to the general population - and how this may vary depending on age and comorbidity.
Serum Prealbumin Levels and Risks of Adverse Clinical Outcomes After Ischemic Stroke
Shi M, Mao X, Wu X, Chu M, Niu H, Sun L, Chang X, He Y, Liu Y, Guo D, Zhang Y, Zhu Z and Zhao J
Prealbumin is a symbol of protein nutrition and is involved in anti-inflammatory and neuron regeneration, but its association with the prognosis of ischemic stroke remains unclear. We aimed to prospectively explore the associations between serum prealbumin levels and adverse clinical outcomes after ischemic stroke in a large-scale cohort study.
Drug-Induced Gynecomastia: Data Mining and Analysis of the FDA Adverse Event Reporting System Database
Yang X, Zheng X, Zhang M, Huang J, Huang P and Wang J
Drug-induced gynecomastia significantly affects patient health and quality of life. This study aimed to perform an exploratory analysis of gynecomastia reports and the most commonly associated medications within the FAERS database.
Incidence of Graves' Disease with Validation and Completeness of the Diagnosis for Registry Extracts in the Danish National Patient Register
Klit FØ, Dal J, Andersen SL, Nikontovic A, Vestergaard P and Karmisholt JS
Graves' disease (GD) is one of the most common causes of thyrotoxicosis. It has been proposed to identify incident GD by using the GD-specific code, E05.0, of the 10th revision of the International Classification of Disease (ICD-10) in the Danish National Patient Register (DNPR). We aimed to report the incidence of GD and to investigate the validity and completeness of E05.0 registration using Aalborg University Hospital (AaUH) as a single centre-sample.
Burden of Gastrointestinal Tumors in Asian Countries, 1990-2021: An Analysis for the Global Burden of Disease Study 2021
Jiang D, Wu Y, Liu L, Shen Y, Li T, Lu Y, Wang P, Sun C, Wang K, Wang K and Ye H
Gastrointestinal tumors represent a significant component of the cancer burden in Asia. This study aims to evaluate the burden of gastrointestinal tumors in Asia from 1990 to 2021 using data from the Global Burden of Disease Study 2021 (GBD 2021).
Risk of Venous Thromboembolism in Statin Users Compared to Fibrate Users in the United Kingdom Clinical Practice Research Datalink (UK CPRD) GOLD
Ayodele O, Cabral HJ, McManus DD and Jick SS
A substantial proportion of adults receive statins for treatment of hypercholesterolemia and cardiovascular risk, and statins have been found to improve outcomes in this patient population. However, studies have not consistently demonstrated the potential benefits of statins in preventing venous thromboembolism (VTE). Therefore, we conducted this study to investigate this association.
Causes of Excess Mortality in Diabetes Patients Without Coronary Artery Disease: A Cohort Study Revealing Endocrinologic Contributions
Birindwa G, Maeng M, Thrane PG, Gyldenkerne C, Thomsen RW and Olesen KKW
Diabetes mellitus (DM) patients without coronary artery disease (CAD) have a higher all-cause mortality rate than patients with neither DM nor CAD. We examined cause-specific death of DM patients with and without CAD.
The Danish National Hospital Medication Register: A Resource for Pharmacoepidemiology
Rosenkrantz O, Wheler J, Westphal Thrane MC, Pedersen L and Sørensen HT
The Danish National Hospital Medication Register (DHMR), one of the first nationwide in-hospital medication registries in the world, contains detailed information on medication administration and dispensing.