The Danish health care system and epidemiological research: from health care contacts to database records

by Schmidt M, Schmidt SAJ, Adelborg K, Sundbøll J, Laugesen K, Ehrenstein V, Sørensen HT
Published 2019-07-01

Existing data sources for clinical epidemiology: Danish registries for studies of medical genetic diseases

by Nguyen-Nielsen M, Svensson E, Vogel I, Ehrenstein V, Sunde L
Published 2013-08-01

Use of prescribed drugs among primiparous women: an 11-year population-based study in Denmark

by Bjørn AM, Nørgaard M, Hundborg HH, Nohr EA, Ehrenstein V
Published 2011-05-01

Existing data sources for clinical epidemiology: Scandinavian Cohort for osteonecrosis of the jaw – work in progress and challenges

by Schiodt M, Larsson Wexell C, Herlofson BB, Giltvedt KM, Norholt SE, Ehrenstein V
Published 2015-01-01

Validity of an algorithm to identify osteonecrosis of the jaw in women with postmenopausal osteoporosis in the Danish National Registry of Patients

by Gammelager H, Sværke C, Noerholt SE, Neumann-Jensen B, Xue F, Critchlow C, Bergdahl J, Lagerros YT, Kieler H, Tell GS, Ehrenstein V
Published 2013-08-01

Design and methods for a Scandinavian pharmacovigilance study of osteonecrosis of the jaw and serious infections among cancer patients treated with antiresorptive agents for the pr...

by Acquavella J, Ehrenstein V, Schiødt M, Heide-Jørgensen U, Kjellman A, Hansen S, Larsson Wexell C, Herlofson BB, Noerholt SE, Ma H, Ӧhrling K, Hernandez RK, Sørensen HT
Published 2016-07-01

Confounding in observational studies based on large health care databases: problems and potential solutions – a primer for the clinician

by Nørgaard M, Ehrenstein V, Vandenbroucke JP
Published 2017-03-01

Clinical epidemiology in the era of big data: new opportunities, familiar challenges

by Ehrenstein V, Nielsen H, Pedersen AB, Johnsen SP, Pedersen L
Published 2017-04-01

Helping everyone do better: a call for validation studies of routinely recorded health data

by Ehrenstein V, Petersen I, Smeeth L, Jick SS, Benchimol EI, Ludvigsson JF, Sørensen HT
Published 2016-04-01

Correspondence between general practitioner-reported medication use and timing of prescription dispensation

by Johannesdottir SA, Mægbæk ML, Hansen JG, Lash TL, Pedersen L, Ehrenstein V
Published 2012-01-01

Danish clinical quality databases – an important and untapped resource for clinical research

by Sørensen HT, Pedersen L, Jørgensen J, Ehrenstein V
Published 2016-10-01

Risk of miscarriage among users of corticosteroid hormones: a population-based nested case-control study

by Bjørn AM, Nielsen RB, Nørgaard M, Nohr EA, Ehrenstein V
Published 2013-08-01

Challenges in translating end points from trials to observational cohort studies in oncology

by Ording AG, Cronin-Fenton D, Ehrenstein V, Lash TL, Acquavella J, Rørth M, Sørensen HT
Published 2016-06-01

Use of prescription paracetamol during pregnancy and risk of asthma in children: a population-based Danish cohort study

by Andersen ABT, Farkas DK, Mehnert F, Ehrenstein V, Erichsen R
Published 2012-02-01

Positive predictive values of the coding for bisphosphonate therapy among cancer patients in the Danish National Patient Registry

by Nielsson MS, Erichsen R, Frøslev T, Taylor A, Acquavella J, Ehrenstein V
Published 2012-08-01

Parental celiac disease and risk of asthma in offspring: a Danish nationwide cohort study

by Andersen ABT, Erichsen R, Kappelman MD, Frøslev T, Ehrenstein V
Published 2014-12-01

Autism spectrum disorders in children of parents with inflammatory bowel disease – a nationwide cohort study in Denmark

by Andersen ABT, Ehrenstein V, Erichsen R, Frøslev T, Sørensen HT
Published 2014-05-01

Existing data sources for clinical epidemiology: The Danish National Database of Reimbursed Prescriptions

by Johannesdottir SA, Horváth-Puhó E, Ehrenstein V, Schmidt M, Pedersen L, Sørensen HT
Published 2012-11-01

The Danish National Patient Registry: a review of content, data quality, and research potential

by Schmidt M, Schmidt SAJ, Sandegaard JL, Ehrenstein V, Pedersen L, Sørensen HT
Published 2015-11-01

Quality of venous thromboembolism diagnoses among prostate cancer patients in the Danish National Registry of Patients

by Drljevic A, Borre M, Høyer M, Ehrenstein V, Nguyen-Nielsen M
Published 2014-10-01