Volkert Dirk Siersma
!!Statistiker, External Lecturer
Forskningsenheden for Almen Praksis
Øster Farimagsgade 5
1353 København K
Section of Biostatistics
Øster Farimagsgade 5 opg. B
1353 København K
- Published
Moderate-to-high intensity physical exercise in patients with Alzheimer’s disease: a randomised controlled trial.
Hoffmann, K., Sobol, N. A., Frederiksen, K. S., Beyer, N. A-M., Vogel, A. M., Vestergaard, K., Brændgaard, H., Gottrup, H., Lolk, A., Wermuth, L., Jacobsen, S., Laugesen, L. P., Gergelyffy, R. G., Høgh, P., Bjerregaard, E., Andersen, B. B., Siersma, V. D., Johannsen, P., Cotman, C. W., Waldemar, G. & 1 others, , 2016, In: Journal of Alzheimer's Disease. 50, 2, p. 443-453 11 p.Research output: Contribution to journal › Journal article › Research › peer-review
- Published
- Published
Availability of point-of-care culture and microscopy in general practice - does it lead to more appropriate use of antibiotics in patients with suspected urinary tract infection?
Holm, Anne, Siersma, Volkert Dirk, Bjerrum, Lars & Cordoba Currea, Gloria Cristina, Dec 2020, In: The European Journal of General Practice. 26, 1, p. 175-181 7 p.Research output: Contribution to journal › Journal article › Research › peer-review
- Published
Clinical accuracy of point-of-care urine culture in general practice
Holm, Anne, Cordoba Currea, Gloria Cristina, Sørensen, Tina Møller, Jessen, Lisbeth Rem, Frimodt-Møller, N., Siersma, Volkert Dirk & Bjerrum, Lars, Jun 2017, In: Scandinavian Journal of Primary Health Care. 35, 2, p. 170-177 8 p.Research output: Contribution to journal › Journal article › Research › peer-review
- Published
Effectiveness of an adaptive, multifaceted intervention to enhance care for patients with complex multimorbidity in general practice: protocol for a pragmatic cluster randomised controlled trial (the MM600 trial)
Holm, Anne, Lyhnebeck, A. B., Rozing, Maarten Pieter, Buhl, S. F., Willadsen, Tora Grauers, Prior, A., Christiansen, Ann-Kathrin Lindahl, Kristensen, J., Andersen, John Sahl, Waldorff, Frans Boch, Siersma, Volkert Dirk, Brodersen, John Brandt, Reventlow, Susanne & MM600 project team, M. P. T., 2024, In: BMJ Open. 14, 2, 11 p., e077441.Research output: Contribution to journal › Journal article › Research › peer-review
- Published
Diagnosis of urinary tract infection based on symptoms: How are likelihood ratios affected by age? a diagnostic accuracy study
Holm, Anne, Siersma, Volkert Dirk & Cordoba Currea, Gloria Cristina, 2021, In: BMJ Open. 11, 1, 7 p., e039871.Research output: Contribution to journal › Journal article › Research › peer-review
- Published
Point of care susceptibility testing in primary care: does it lead to a more appropriate prescription of antibiotics in patients with uncomplicated urinary tract infections? Protocol for a randomized controlled trial
Holm, Anne, Cordoba Currea, Gloria Cristina, Sørensen, Tina Møller, Jessen, Lisbeth Rem, Siersma, Volkert Dirk & Bjerrum, Lars, 2015, In: B M C Family Practice. 16, 8 p., 106.Research output: Contribution to journal › Journal article › Research › peer-review
- Published
Effect of point-of-care susceptibility testing in general practice on appropriate prescription of antibiotics for patients with uncomplicated urinary tract infection: a diagnostic randomised controlled trial
Holm, Anne, Cordoba Currea, Gloria Cristina, Sørensen, Tina Møller, Jessen, Lisbeth Rem, Frimodt-Møller, N., Siersma, Volkert Dirk & Bjerrum, Lars, Oct 2017, In: B M J Open. 7, 10, 9 p., e018028.Research output: Contribution to journal › Journal article › Research › peer-review
- Published
Development and validation of a condition-specific diary to measure severity, bothersomeness and impact on daily activities for patients with acute urinary tract infection in primary care
Holm, Anne, Cordoba Currea, Gloria Cristina, Siersma, Volkert Dirk & Brodersen, John Brandt, 24 Mar 2017, In: Health and Quality of Life Outcomes. 15, p. 1-8 8 p., 57.Research output: Contribution to journal › Journal article › Research › peer-review
- Published
Effects of Implementing the Short-Term Assessment of Risk and Treatability for Mechanical Restraint in a Forensic Male Population: A Stepped-Wedge, Cluster-Randomized Design
Hvidhjelm, J., Brandt-Christensen, M., Delcomyn, C., Møllerhøj, J., Siersma, Volkert Dirk & Bak, J., 2022, In: Frontiers in Psychiatry. 13, 9 p., 822295.Research output: Contribution to journal › Journal article › Research › peer-review
- Published
Management of dyslipidaemia in individuals with severe mental illness: a population-based study in the Greater Copenhagen Area
Høgnason Mohr, G., Barcella, C. A., Grand, Mia Klinten, Kriegbaum, Margit, Siersma, Volkert Dirk, Hahn, M. K., Agarwal, S. M., Bakkedal, Catrine, Baandrup, Lone, Knop, Filip Krag, Andersen, C. L. & Ebdrup, Bjørn, 2023, In: Therapeutic Advances in Psychopharmacology. 13, 13 p.Research output: Contribution to journal › Journal article › Research › peer-review
- Published
Sampling of urine for diagnosing urinary tract infection in general practice–First-void or mid-stream urine?
Hølmkjær, Pernille, Bjerrum, Lars, Mäkelä, Marjukka, Siersma, Volkert Dirk & Holm, Anne, 2019, In: Scandinavian Journal of Primary Health Care. 37, 1, p. 113-119 7 p.Research output: Contribution to journal › Journal article › Research › peer-review
- Published
The feasibility of C-reactive protein point-of-care testing to reduce overuse of antibiotics in children with acute respiratory tract infections in rural Kyrgyzstan: A Pilot Study
Isaeva, E., Akylbekov, A., Bloch, J., Poulsen, A., Kurtzhals, Jørgen, Siersma, Volkert Dirk, Sooronbaev, T., Aabenhus, Rune Munck & Kjærgaard, J., 2024, In: Pediatric health, medicine and therapeutics. 15, p. 67-76 10 p.Research output: Contribution to journal › Journal article › Research › peer-review
- Published
C reactive protein-guided prescription of antibiotics for children under 12 years with respiratory symptoms in Kyrgyzstan: protocol for a randomised controlled clinical trial with 14 days follow-up
Isaeva, E., Bloch, J., Poulsen, A., Kurtzhals, Jørgen, Reventlow, Susanne, Siersma, Volkert Dirk, Akylbekov, A., Sooronbaev, T., Aabenhus, Rune Munck & Kjærgaard, J., 2023, In: BMJ Open. 13, 4, 6 p., e066806.Research output: Contribution to journal › Journal article › Research › peer-review
- Published
Defining the surgical footprint in cataract surgery: patient-related outcomes dependent on the experience of the surgeon
Jacobsen, M. F., Holm, Lars Morten, Erichsen, J. H., Konge, Lars, Siersma, Volkert Dirk, la Cour, Morten & Thomsen, Ann Sofia Skou, 2021, In: Acta Ophthalmologica. 99, 7, p. e999-e1005 7 p.Research output: Contribution to journal › Journal article › Research › peer-review
- Published
Predictors of visual outcome in patients operated for craniopharyngioma - a Danish national study
Jacobsen, M. F., Thomsen, A. S. S., Bach-Holm, Daniella, Doroudian, G., Nissen, K. R., Fugleholm, Kåre, Poulsgaard, L., Siersma, Volkert Dirk & Heegaard, Steffen, Feb 2018, In: Acta Ophthalmologica. 96, 1, p. 39-45Research output: Contribution to journal › Journal article › Research › peer-review
- Published
The impact of patients' involvement in cooking on their mortality and morbidity: A 19-year follow-up of patients newly diagnosed with type 2 diabetes mellitus.
Jandorf, S., Siersma, Volkert Dirk, Køster-Rasmussen, Rasmus, Olivarius, Niels de Fine & Waldorff, Frans Boch, 2015, In: Scandinavian Journal of Primary Health Care. 33, 1, p. 33-39 7 p.Research output: Contribution to journal › Journal article › Research › peer-review
- Published
The impact of influences in a medical screening programme invitation: a randomized controlled trial
Jauernik, Christian Patrick, Rahbek, O. J., Ploug, T., Siersma, Volkert Dirk & Brodersen, John Brandt, 2023, In: European Journal of Public Health. 33, 3, 6 p.Research output: Contribution to journal › Journal article › Research › peer-review
- Published
Cerebrospinal Fluid Amyloid Beta and Tau Concentrations Are Not Modulated by 16 Weeks of Moderate- to High-Intensity Physical Exercise in Patients with Alzheimer Disease
Jensen, C. S., Portelius, E., Siersma, Volkert Dirk, Høgh, Peter, Wermuth, L., Blennow, K., Zetterberg, H., Waldemar, Gunhild, Hasselbalch, Steen & Simonsen, A. H., Oct 2016, In: Dementia and Geriatric Cognitive Disorders. 42, 3-4, p. 146-158 13 p.Research output: Contribution to journal › Journal article › Research › peer-review
- Published
Patients with Alzheimer's disease who carry the APOE ε4 allele benefit more from physical exercise
Jensen, C. S., Simonsen, A. H., Siersma, Volkert Dirk, Beyer, N., Frederiksen, K. S., Gottrup, H., Hoffman, K., Høgh, Peter, Frikke-Schmidt, Ruth, Sobol, N. A., Waldemar, Gunhild, Wermuth, L. & Hasselbalch, Steen, 2019, In: Alzheimer's and Dementia: Translational Research and Clinical Interventions. 5, 1, p. 99-106 8 p.Research output: Contribution to journal › Journal article › Research › peer-review
- Published
Paracetamol for feverish children: parental motives and experiences
Jensen, J. F., Tonnesen, L. L., Söderström, M., Thorsen, Hanne & Siersma, Volkert Dirk, 2010, In: Scandinavian Journal of Primary Health Care. 28, 2, p. 115-120 6 p.Research output: Contribution to journal › Journal article › Research › peer-review
- Published
Association of Maternal Self-Medication and Over-the-Counter Analgesics for Children
Jensen, J. F., Gottschau, M., Siersma, Volkert Dirk, mxb897, mxb897, Holstein, B. E. & Knudsen, Lisbeth E., 1 Feb 2014, In: Pediatrics. 133, 2, p. e291-8 8 p.Research output: Contribution to journal › Journal article › Research › peer-review
- Published
Using a Deliberative Poll on breast cancer screening to assess and improve the decision quality of laypeople
Jensen, Manja Dahl, Hansen, Kasper Møller, Siersma, Volkert Dirk & Brodersen, John Brandt, 2021, In: PLoS ONE. 16, 10 , 21 p., e0258869.Research output: Contribution to journal › Journal article › Research › peer-review
- Published
Direct and indirect healthcare costs of lung cancer CT screening in Denmark: a registry study
Jensen, Manja Dahl, Siersma, Volkert Dirk, Rasmussen, J. F. & Brodersen, John Brandt, 2020, In: B M J Open. 10, 1, 11 p., e031768.Research output: Contribution to journal › Journal article › Research › peer-review
- Published
Sociodemographic characterisation of antibiotic heavy users in the Danish elderly population
Jensen, Maria Louise Veimer, Aabenhus, Rune Munck, Holzknecht, Barbara Juliane, Bjerrum, Lars, Siersma, Volkert Dirk, Cordoba Currea, Gloria Cristina & Jensen, J. N., 2024, In: Scandinavian Journal of Public Health. 52, 1, p. 51-58 8 p.Research output: Contribution to journal › Journal article › Research › peer-review
- Published
Prior Antibiotic Use Increases Risk of Urinary Tract Infections Caused by Resistant Escherichia coli among Elderly in Primary Care: A Case-Control Study
Jensen, Maria Louise Veimer, Siersma, Volkert Dirk, Søes, L. M., Nicolaisdottir, Dagny Ros, Bjerrum, Lars & Holzknecht, Barbara Juliane, 2022, In: Antibiotics. 11, 10, 11 p., 1382.Research output: Contribution to journal › Journal article › Research › peer-review
- Published
Ocular graft-versus-host disease and dry eye disease after paediatric haematopoietic stem cell transplantation - incidence and risk factors
Jeppesen, H., Kielsen, K., Siersma, Volkert Dirk, Lindegaard, J., Julian, H. O., Heegaard, Steffen, Sengeløv, Henrik & Muller, Klaus, 2022, In: Bone Marrow Transplantation. 57, p. 487–498 12 p.Research output: Contribution to journal › Journal article › Research › peer-review
- Published
Replik angående screening för bukaortaaneurysm: Dags för oberoende granskning av det svenska screeningprogrammet
Johansson, M., Zahl, P. H., Siersma, Volkert Dirk, Jørgensen, K. J., Marklund, B. & Brodersen, John Brandt, 2018, In: Lakartidningen. 115, 37, p. 1373 1 p.Research output: Contribution to journal › Comment/debate › Research › peer-review
- Published
Benefits and harms of screening men for abdominal aortic aneurysm in Sweden: a registry-based cohort study
Johansson, M., Zahl, P. H., Siersma, Volkert Dirk, Jørgensen, K. J., Marklund, B. & Brodersen, John Brandt, 2018, In: Lancet Oncology. 391, 10138, p. 2441-2447 7 p.Research output: Contribution to journal › Journal article › Research › peer-review
- Published
Screening for abdominal aortic aneurysm - Authors' reply
Johansson, M., Zahl, P. H., Siersma, Volkert Dirk, Jørgensen, K. J., Marklund, B. & Brodersen, John Brandt, 2019, In: Lancet Oncology. 393, 10166, p. 28 1 p.Research output: Contribution to journal › Letter › Research › peer-review
- Published
Postoperative Cognitive Dysfunction in Middle-aged Patients
Johnson, T., Monk, T., Rasmussen, L. S., Abildstrøm, H., Houx, P., Korttila, K., Kuipers, H. M., Hanning, C. D., Siersma, Volkert Dirk, Kristensen, D., Canet, J., Ibanaz, M. T. & Møller, J. T., 2002, In: Anesthesiology. 96, p. 1351-7Research output: Contribution to journal › Journal article › Research › peer-review
- Published
Postoperative Cognitive Dysfunction: Overinterpretation of Data?: In Reply:-
Johnson, T., Rasmussen, L., Korttila, K., Siersma, Volkert Dirk & Canet, J., 2003, In: Anesthesiology. 98, p. 1295Research output: Contribution to journal › Journal article › Research › peer-review
- Published
Markers of DNA/RNA damage from oxidation as predictors of a registry-based diagnosis of psychiatric illness in type 2 diabetic patients
Jørgensen, Anders, Siersma, Volkert Dirk, Davidsen, Annette Sofie, Weimann, A., Henriksen, T., Poulsen, Henrik Enghusen & Olivarius, Niels de Fine, Jan 2018, In: Psychiatry Research. 259, p. 370-376 7 p.Research output: Contribution to journal › Journal article › Research › peer-review
- Published
Optimal volume of local anaesthetic for the adductor canal block: Using the continual reassessment method to estimate the ED95
Jæger, P., Jenstrup, M. T., Lund, J., Siersma, Volkert Dirk, Brøndum, V., Hilsted, K. L. & Dahl, J. B., 2015, In: British Journal of Anaesthesia. 115, 6, p. 920-926 7 p.Research output: Contribution to journal › Journal article › Research › peer-review
- Published
Effect of Total Dose of Lidocaine on Duration of Adductor Canal Block, Assessed by Different Test Methods: A Report of Two Blinded, Randomized, Crossover Studies in Healthy Volunteers
Jæger, P., Koscielniak-Nielsen, Z. J., Hilsted, K. L., Grevstad, U., Siersma, Volkert Dirk, Fabritius, M. L. & Dahl, J. B., Oct 2016, In: Anesthesia and Analgesia. 123, 4, p. 1026-1032 7 p.Research output: Contribution to journal › Journal article › Research › peer-review
- E-pub ahead of print
Development and implementation of a tool for measuring the training effectiveness of the patient-centered consultation mode
Jørgensen, Merete, Thorsen, Hanne, Siersma, Volkert Dirk & Bang, C. W., 2023, (E-pub ahead of print) In: MedEPublish. 16 p.Research output: Contribution to journal › Journal article › Research › peer-review
- Published
Use of online material in teaching general practice: Brug af online material i undervisningen i almen medicin
Jørgensen, Merete, Witt, K., Mäkelä, Marjukka, Siersma, Volkert Dirk & Bang, C. W., 2022, In: Læring og Medier. 14, 24, 20 p.Research output: Contribution to journal › Journal article › Research › peer-review
- Published
Mobility limitation as determinant of primary care use and ambulatory care sensitive conditions
Jørgensen, Terese Sara Høj, Siersma, Volkert Dirk, Lund, Rikke & Nilsson, Charlotte Juul, 2019, In: European Geriatric Medicine. 10, 1, p. 53-60 8 p.Research output: Contribution to journal › Journal article › Research › peer-review
- Published
Interplay between financial assets and social relations on decline in physical function and mortality among older people
Jørgensen, Terese Sara Høj, Lund, Rikke, Siersma, Volkert Dirk & Nilsson, Charlotte Juul, 2018, In: European Journal of Ageing. 15, 2, p. 133–142 10 p.Research output: Contribution to journal › Journal article › Research › peer-review
- Published
Intergenerational relations and social mobility: Social inequality in physical function in old age
Jørgensen, Terese Sara Høj, Nilsson, Charlotte Juul, Lund, Rikke, Siersma, Volkert Dirk & Fors, S., Jan 2019, In: Archives of Gerontology and Geriatrics. 80, p. 58-64 7 p.Research output: Contribution to journal › Journal article › Research › peer-review
- Published
Mortality Following Trajectories of Mobility Limitations: The Modifying Impact of Social Factors
Jørgensen, Terese Sara Høj, Siersma, Volkert Dirk, Lund, Rikke & Nilsson, Charlotte Juul, 2020, In: Journal of Aging and Health. 32, 3-4, p. 134-142 9 p.Research output: Contribution to journal › Journal article › Research › peer-review
- Published
Long-term success after trabeculotomy in primary congenital glaucoma – a study with up to 35 years follow-up
Kessel, Line, Pedersen, K. B., Siersma, Volkert Dirk, Kappelgaard, P. & Bach-Holm, Daniella, 2021, In: Acta Ophthalmologica. 99, 4, p. 362-368 7 p.Research output: Contribution to journal › Journal article › Research › peer-review
- Published
Increased risk of developing diabetes in depressive and bipolar disorders?
Kessing, L. V., Nilsson, F. M., Siersma, Volkert Dirk & Andersen, Per Kragh, 2004, In: Journal of Psychiatric Research. 38, p. 395-402Research output: Contribution to journal › Journal article › Research › peer-review
- Published
No increased risk of developing depression in diabetes compared to other chronic illness
Kessing, L. V., Nilsson, F. M., Siersma, Volkert Dirk & Andersen, Per Kragh, 2003, In: Diabetes Research and Clinical Practice. 62, p. 113-121Research output: Contribution to journal › Journal article › Research › peer-review
- Published
Family matters: Parental-acquired brain injury and child functioning
Kieffer-Kristensen, R., Siersma, Volkert Dirk & Teasdale, T. W., 2013, In: NeuroRehabilitation. 32, 1, p. 59-68 10 p.Research output: Contribution to journal › Journal article › Research › peer-review
- Published
The risk of bleeding and perforation from sigmoidoscopy or colonoscopy in colorectal cancer screening: A systematic review and meta-analyses
Kindt, I. S., Martiny, Frederik Handberg Juul, Gram, Emma Grundtvig, Bie, A. K. L., Jauernik, Christian Patrick, Rahbek, O. J., Nielsen, S. B., Siersma, Volkert Dirk, Bang, C. W. & Brodersen, John Brandt, 2023, In: PLoS ONE. 18, 10, 17 p., e0292797.Research output: Contribution to journal › Journal article › Research › peer-review
- Published
To allow or avoid pain during shoulder rehabilitation exercises for patients with chronic rotator cuff tendinopathy-Study protocol for a randomized controlled trial (the PASE trial)
Kjær, B. H., Cools, A. M., Johannsen, F. E., Trøstrup, J., Bieler, T., Siersma, Volkert Dirk & Magnusson, Stig Peter, 2024, In: Trials. 25, 1, 19 p., 135.Research output: Contribution to journal › Journal article › Research › peer-review
- Published
The effect of structured personal care on RNA oxidation: A 19-year follow-up of the randomized trial Diabetes Care in General Practice (DCGP)
Kjær, L. K., Grand, Mia Klinten, Siersma, Volkert Dirk, Brødbæk, K., Jørgensen, Anders, Olivarius, Niels de Fine & Poulsen, Henrik Enghusen, 2019, In: Journal of Diabetes and its Complications. 33, 3, p. 202-207Research output: Contribution to journal › Journal article › Research › peer-review
- Published
Biomonitoring of Danish school children and mothers including biomarkers of PBDE and glyphosate
Knudsen, Lisbeth E., Hansen, P. W., Mizrak, S., Hansen, H. K., Mørck, T. A., Nielsen, F., Siersma, Volkert Dirk & Mathiesen, Line, 26 Sep 2017, In: Reviews on Environmental Health. 32, 3, p. 279-290 12 p.Research output: Contribution to journal › Journal article › Research › peer-review
- Published
Association between perioperative hyperoxia and cerebrovascular complications after laparotomy: A post-hoc follow-up study
Kongebro, E. K., Jørgensen, Lars Nannestad, Siersma, Volkert Dirk & Meyhoff, Christian Sylvest, 2019, In: Acta Anaesthesiologica Scandinavica. 63, 2, p. 164-170Research output: Contribution to journal › Journal article › Research › peer-review
ID: 3512987
Most downloads
-
761
downloads
Maternal stress and placental function, a study using questionnaires and biomarkers at birth
Research output: Contribution to journal › Journal article › Research › peer-review
Published -
329
downloads
Clinical indications for antibiotic use in Danish general practice: results from a nationwide electronic prescription database
Research output: Contribution to journal › Journal article › Research › peer-review
Published -
326
downloads
Biomonitoring of Danish school children and mothers including biomarkers of PBDE and glyphosate
Research output: Contribution to journal › Journal article › Research › peer-review
Published