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
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Increased Incidence of Mental Disorders in Children with Cataract: Findings from a Population-based Study
AL-BAKRI, M. O. U. G., SKOVGAARD, A. M., Bach-Holm, Daniella, LARSEN, D. A., Siersma, Volkert Dirk & Kessel, Line, 2022, In: American Journal of Ophthalmology. 236, p. 204-211 8 p.Research output: Contribution to journal › Journal article › Research › peer-review
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The development and validation of a multidimensional sum-scaling questionnaire to measure patient-reported outcomes in acute respiratory tract infections in primary care: the Acute Respiratory Tract Infection Questionnaire: ARTIQ
Aabenhus, Rune Munck, Thorsen, Hanne, Siersma, Volkert Dirk & Brodersen, John Brandt, 2013, In: Value in Health. 16, p. 987-992 6 p.Research output: Contribution to journal › Journal article › Research › peer-review
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Antibiotic prescribing in Danish general practice 2004-13
Aabenhus, Rune Munck, Siersma, Volkert Dirk, Hansen, M. P. & Bjerrum, Lars, Aug 2016, In: Journal of Antimicrobial Chemotherapy. 71, 8, p. 2286-2294 9 p.Research output: Contribution to journal › Journal article › Research › peer-review
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Clinical indications for antibiotic use in Danish general practice: results from a nationwide electronic prescription database
Aabenhus, Rune Munck, Hansen, M. P., Siersma, Volkert Dirk & Bjerrum, Lars, 2017, In: Scandinavian Journal of Primary Health Care. 35, 2, p. 162-169 8 p.Research output: Contribution to journal › Journal article › Research › peer-review
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Identifying practice-related factors for high-volume prescribers of antibiotics in Danish general practice
Aabenhus, Rune Munck, Siersma, Volkert Dirk, Sandholdt, H., Køster-Rasmussen, Rasmus, Hansen, M. P. & Bjerrum, Lars, 1 Aug 2017, In: Journal of Antimicrobial Chemotherapy. 72, 8, p. 2385-2391 7 p.Research output: Contribution to journal › Journal article › Research › peer-review
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Apolipoprotein E Genotype and Cognitive Dysfunction after Noncardiac Surgery
Abildstrøm, H., Christiansen, M., Siersma, Volkert Dirk & Rasmussen, L. S., 2004, In: Anesthesiology. 101, p. 855-861Research output: Contribution to journal › Journal article › Research › peer-review
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Assessment of the Psychometric Properties of the Danish VISA-P
Agergaard, Anne-Sofie, Comins, J. D., Siersma, Volkert Dirk, Malmgaard-Clausen, N. M., Couppé, Christian, Hjortshoej, M. H., Olesen, J. L. & Magnusson, Stig Peter, 2023, In: Translational Sports Medicine. 2023, 8 p., 5291949.Research output: Contribution to journal › Journal article › Research › peer-review
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Psychosocial consequences of allocation to lung cancer screening: a randomised controlled trial
Aggestrup, L. M., Hestbech, Mie Sara, Siersma, Volkert Dirk, Pedersen, J. H. & Brodersen, John Brandt, 2012, In: B M J Open. 2, e000663.Research output: Contribution to journal › Journal article › Research › peer-review
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School performances in children with cataract: results from a population-based cohort study
Al-Bakri, M., Skovgaard, A. M., Bach-Holm, Daniella, Larsen, D. A., Siersma, Volkert Dirk & Kessel, Line, 2023, In: BMJ Open. 13, 8, 9 p., e072984.Research output: Contribution to journal › Journal article › Research › peer-review
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Socio-economic status in families affected by childhood cataract
Al-Bakri, M., Bach-Holm, Daniella, Larsen, D. A., Siersma, Volkert Dirk & Kessel, Line, 2022, In: Acta Ophthalmologica. 100, 2, p. 183-188 6 p.Research output: Contribution to journal › Journal article › Research › peer-review
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Increased healing in diabetic toe ulcers in a multidisciplinary foot clinic—An observational cohort study
Almdal, Thomas Peter, Nielsen, A. A., Nielsen, K. E., Jørgensen, M. E., Rasmussen, A., Hangaard, S., Siersma, Volkert Dirk & Holstein, P., 2015, In: Diabetes Research and Clinical Practice. 110, 3, p. 315-321 7 p.Research output: Contribution to journal › Journal article › Research › peer-review
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The Copenhagen primary care differential count (CopDiff) database
Andersen, Christen Bertel L, Siersma, Volkert Dirk, Karlslund, W., Hasselbalch, H. C., Felding, P., Bjerrum, O. W. & Olivarius, Niels de Fine, 2014, In: Clinical Epidemiology. 6, p. 199-211 13 p.Research output: Contribution to journal › Journal article › Research › peer-review
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Eosinophilia in routine blood samples and the subsequent risk of hematological malignancies and death
Andersen, Christen Bertel L, Siersma, Volkert Dirk, Hasselbalch, H., Lindegaard, H., Vestergaard, H., Felding, P., Olivarius, Niels de Fine & Bjerrum, O. W., 2013, In: American Journal of Hematology. 88, 10, p. 843-847Research output: Contribution to journal › Journal article › Research › peer-review
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Risk of Lymphoma and Solid Cancer among Patients with Rheumatoid Arthritis in a Primary Care Setting
Andersen, Christen Bertel L, Lindegaard, H. M., Vestergaard, H., Siersma, Volkert Dirk, Hasselbalch, H. C., Olivarius, Niels de Fine, Bjerrum, O. W. & Junker, P., 2014, In: PLOS ONE. 9, 6, p. 1-7 7 p., e99388.Research output: Contribution to journal › Journal article › Research › peer-review
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Eosinophilia in routine blood samples as a biomarker for solid tumor development: A study based on The Copenhagen Primary Care Differential Count (CopDiff) Database
Andersen, Christen Bertel L, Siersma, Volkert Dirk, Hasselbalch, H. C., Lindegaard, H., Vestergaard, H., Felding, P., Olivarius, Niels de Fine & Bjerrum, O. W., 2014, In: Acta Oncologica. 53, 9, p. 1245-1250 6 p.Research output: Contribution to journal › Journal article › Research › peer-review
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Prevalence and clinical significance of neutropenia discovered in routine complete blood cell counts: a longitudinal study
Andersen, Christen Bertel L, Tesfa, D., Siersma, Volkert Dirk, Sandholdt, H., Hasselbalch, H., Bjerrum, O. W., Felding, P., Lind, B., Olivarius, Niels de Fine & Palmblad, J., 2016, In: Journal of Internal Medicine. 279, 6, p. 566-575Research output: Contribution to journal › Journal article › Research › peer-review
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Association of the blood eosinophil count with hematological malignancies and mortality
Andersen, Christen Bertel L, Siersma, Volkert Dirk, Hasselbalch, Hans Carl, Vestergaard, H., Mesa, R., Felding, P., Olivarius, Niels de Fine & Bjerrum, O. W., Mar 2015, In: American Journal of Hematology. 90, 3, p. 225-229 5 p.Research output: Contribution to journal › Journal article › Research › peer-review
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Is thrombocytosis a valid indicator of advanced stage and high mortality of gynecological cancer?
Andersen, Christen Bertel L, Eskelund, C. W., Siersma, Volkert Dirk, Felding, P., Lind, B., Palmblad, J., Bjerrum, O. W., Friis, S., Hasselbalch, H. C. & Olivarius, Niels de Fine, Nov 2015, In: Gynecologic Oncology. 139, 2, p. 312-318 7 p.Research output: Contribution to journal › Journal article › Research › peer-review
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Is it okay to choose to receive bad news by telephone? An observational study on psychosocial consequences of diagnostic workup for lung cancer suspicion
Andersen, I. C., Siersma, Volkert Dirk, Marsaa, K., Preisel, N., Høegholm, A., Brodersen, John Brandt & Bodtger, U., 2022, In: Acta Oncologica. 61, 12, p. 1446-1453Research output: Contribution to journal › Journal article › Research › peer-review
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Accreditation in general practice in Denmark: study protocol for a cluster-randomized controlled trial
Andersen, M. K., Pedersen, L. B., Siersma, Volkert Dirk, Bro, F., Reventlow, Susanne, Søndergaard, J., Kousgaard, Marius Brostrøm & Waldorff, Frans Boch, 13 Feb 2017, In: Trials. 18, p. 1-9 9 p., 69.Research output: Contribution to journal › Journal article › Research › peer-review
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Pre-diagnostic trajectories of lymphocytosis predict time to treatment and death in patients with chronic lymphocytic leukemia
Andersen, M. A., Grand, Mia Klinten, Brieghel, C., Siersma, Volkert Dirk, Andersen, Christen Bertel L & Niemann, Carsten, 2022, In: Communications Medicine. 2, 8 p., 50.Research output: Contribution to journal › Journal article › Research › peer-review
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Structural and cognitive correlates of fatigue in progressive multiple sclerosis
Andreasen, A. K., Iversen, P., Marstrand, L., Siersma, Volkert Dirk, Siebner, Hartwig Roman & Sellebjerg, Finn Thorup, 2019, In: Neurological Research. 41, 2, p. 168-176Research output: Contribution to journal › Journal article › Research › peer-review
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Comparing restrictive versus liberal oxygen strategies for trauma patients: The TRAUMOX2 trial—Statistical analysis plan
Arleth, T., Baekgaard, J., Siersma, Volkert Dirk, Klimek, M., Hinkelbein, J., Rasmussen, L. S., Steinmetz, Jacob & for The TRAUMOX2 Study Group, F. T. T. S. G., 2023, In: Acta Anaesthesiologica Scandinavica. 67, 6, 10 p.Research output: Contribution to journal › Journal article › Research › peer-review
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Effectiveness of a tailored intervention to reduce antibiotics for urinary tract infections in nursing home residents: a cluster, randomised controlled trial
Arnold, Sif Helene, Jensen, J. N., Bjerrum, Lars, Siersma, Volkert Dirk, Bang, C. W., Kousgaard, Marius Brostrøm & Holm, Anne, 2021, In: Lancet Infectious Diseases. 21, 11, p. 1549-1556 8 p.Research output: Contribution to journal › Journal article › Research › peer-review
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Reducing Antibiotic Prescriptions for Urinary Tract Infection in Nursing Homes Using a Complex Tailored Intervention Targeting Nursing Home Staff: Protocol for a Cluster Randomized Controlled Trial
Arnold, Sif Helene, Jensen, J. N., Kousgaard, Marius Brostrøm, Siersma, Volkert Dirk, Bjerrum, Lars & Holm, Anne, 2020, In: J M I R Research Protocols. 9, 5, 10 p., e17710.Research output: Contribution to journal › Journal article › Research › peer-review
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The impact of cancer on diabetes outcomes
Arreskov, Anne Beiter, Olsen, M. Å., Pouplier, S. S., Siersma, Volkert Dirk, Andersen, Christen Bertel L, Friis, S. & Olivarius, Niels de Fine, 2019, In: BMC Endocrine Disorders. 19, 9 p., 60.Research output: Contribution to journal › Journal article › Research › peer-review
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Communicating Test Results: Considering diagnostic and screening tests
Austin, L., Siersma, Volkert Dirk, Jensen, H. L. & Brodersen, John Brandt, 2009.Research output: Contribution to conference › Conference abstract for conference › Research
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A high fraction of inspired oxygen may increase mortality in intubated trauma patients – A retrospective cohort study
Baekgaard, J., Siersma, Volkert Dirk, Christensen, R. E., Ottosen, C. I., Gyldenkærne, K. B., Garoussian, J., Baekgaard, E. S., Steinmectz, J. & Rasmussen, L. S., 2022, In: Injury. 53, 1, p. 190-197 8 p.Research output: Contribution to journal › Journal article › Research › peer-review
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Comparing restrictive versus liberal oxygen strategies for trauma patients-the TRAUMOX2 trial: protocol for a randomised clinical trial
Baekgaard, J., Arleth, T., Siersma, Volkert Dirk, Hinkelbein, J., Yücetepe, S., Klimek, M., Van Vledder, M. G., Van Lieshout, E. M. M., Mikkelsen, S., Zwisler, S. T., Andersen, M., Fenger-Eriksen, C., Isbye, Dan Lou, Rasmussen, L. S. & Steinmetz, Jacob, 2022, In: BMJ Open. 12, 11, 9 p., e064047.Research output: Contribution to journal › Journal article › Research › peer-review
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Inappropriate antibiotic prescribing and demand for antibiotics in patients with upper respiratory tract infections is hardly different in female versus male patients as seen in primary care
Bagger, K., Nielsen, Anni Brit Sternhagen, Siersma, Volkert Dirk & Bjerrum, Lars, 2015, In: The European Journal of General Practice. 21, 2, p. 118-123 6 p.Research output: Contribution to journal › Journal article › Research › peer-review
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Comparing the effect of non-medical mechanical restraint preventive factors between psychiatric units in Denmark and Norway.
Bak, J., Zoffmann, Vibeke, Sestoft, D. M., Almvik, R., Siersma, Volkert Dirk & Brandt-Christensen, M., 2015, In: Nordic Journal of Psychiatry. 69, 6, p. 1715-1725 11 p.Research output: Contribution to journal › Journal article › Research › peer-review
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The development of type 2 diabetes management in people with severe mental illness in the Capital Region of Denmark from 2001 to 2015
Bakkedal, Catrine, Persson, F., Christensen, Mikkel Bring, Kriegbaum, Margit, Mohr, G. H., Andersen, John Sahl, Lind, B. S., Lykkegaard, C., Siersma, Volkert Dirk & Rozing, Maarten Pieter, 2024, In: Acta Psychiatrica Scandinavica. 149, 3, p. 219-233 15 p.Research output: Contribution to journal › Journal article › Research › peer-review
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Exploring the concurrent validity of the nationwide assessment of permanent nursing home residence in Denmark: A cross-sectional data analysis using two administrative registries
Bebe, Anna, Nielsen, Anni Brit Sternhagen, Willadsen, Tora Grauers, Søndergaard, J., Siersma, Volkert Dirk, Nicolaisdottir, Dagny Ros, Kragstrup, Jakob & Waldorff, Frans Boch, 29 Aug 2017, In: B M C Health Services Research. 17, p. 1-7 7 p., 607.Research output: Contribution to journal › Journal article › Research › peer-review
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The Effect of Economic Assets on Mortality in Patients with Dementia: A Population-Based Cohort Study
Bebe, Anna, Siersma, Volkert Dirk, Kragstrup, Jakob, Nielsen, Anni Brit Sternhagen, Møller, Anne, Søndergaard, J., Nicolaisdottir, Dagny Ros & Waldorff, Frans Boch, 2019, In: Journal of Alzheimer's Disease. 67, 4, p. 1245-1253 10 p.Research output: Contribution to journal › Journal article › Research › peer-review
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Social relations and leisure activities as predictors of wellbeing among older adults with multiple sclerosis: A cross-sectional survey study in Denmark
Bergien, Sofie Olsgaard, Siersma, Volkert Dirk, Kristiansen, Maria & Skovgaard, L., 2023, In: Multiple Sclerosis and Related Disorders. 77, 8 p., 104878.Research output: Contribution to journal › Journal article › Research › peer-review
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Alcohol consumption and mortality in patients with mild Alzheimer's disease: a prospective cohort study
Berntsen, S., Kragstrup, Jakob, Siersma, Volkert Dirk, Waldemar, Gunhild & Waldorff, Frans Boch, 11 Dec 2015, In: B M J Open. 5, 12, p. 1-7 7 p., e007851.Research output: Contribution to journal › Journal article › Research › peer-review
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Social-cognitive and school factors in lifetime smoking among adolescents
Bidstrup, P. E., Frederiksen, K., Siersma, Volkert Dirk, Mortensen, Erik Lykke, Ross, L., Vinther-Larsen, M., Gronbaek, M. & Johansen, C., 2008, In: Cancer Epidemiology, Biomarkers & Prevention. 17, 8, p. 1862-1871 9 p.Research output: Contribution to journal › Journal article › Research › peer-review
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Social-cognitive and school factors in initiation of smoking among adolescents: a prospective cohort study
Bidstrup, P. E., Frederiksen, K., Siersma, Volkert Dirk, Mortensen, Erik Lykke, Ross, L., Vinther-Larsen, M., Grønbæk, M. & Johansen, Christoffer, 2009, In: Cancer Epidemiology, Biomarkers & Prevention. 18, 2, p. 384-92 8 p.Research output: Contribution to journal › Journal article › Research › peer-review
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OP0006-HPR Even in The Long Run Nordic Walking Is Superior To Strength Training and Home Based Exercise for Improving Physical Function in Older People with Hip Osteoarthritis - An RCT
Bieler, T., Siersma, Volkert Dirk, Magnusson, Stig Peter, Kjær, M. & Beyer, N., 2016, In: Annals of the Rheumatic Diseases. 75, p. 55 1 p.Research output: Contribution to journal › Journal article › Research › peer-review
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In hip osteoarthritis, Nordic Walking is superior to strength training and home based exercise for improving function
Bieler, T., Siersma, Volkert Dirk, Magnusson, Stig Peter, Kjær, Michael, Christensen, H. E. & Beyer, N., Aug 2017, In: Scandinavian Journal of Medicine & Science in Sports. 27, 8, p. 873–886 14 p.Research output: Contribution to journal › Journal article › Research › peer-review
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Exercise induced effects on muscle function and range of motion in patients with hip osteoarthritis
Bieler, T., Siersma, Volkert Dirk, Magnusson, Stig Peter, Kjær, Michael & Beyer, N., Jan 2018, In: Physiotherapy Research International. 23, 1, 9 p., e1697.Research output: Contribution to journal › Journal article › Research › peer-review
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Effectiveness of promotion and support for physical activity maintenance post total hip arthroplasty-study protocol for a pragmatic, assessor-blinded, randomized controlled trial (the PANORAMA trial)
Bieler, T., Magnusson, Stig Peter, Siersma, Volkert Dirk, Rinaldo, M., Schmiegelow, M. T., Beck, T., Krifa, A., Kjaer, B. H., wcr491, wcr491 & Midtgaard, Julie, 2022, In: Trials. 23, 1, 17 p., 647.Research output: Contribution to journal › Journal article › Research › peer-review
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Measuring needs-based quality of life and self-perceived health inequity in patients with multimorbidity: investigating psychometric measurement properties of the MultiMorbidity Questionnaire (MMQ) using primarily Rasch models
Bissenbakker, Kristine Henderson, Siersma, Volkert Dirk, Jønsson, Alexandra Brandt Ryborg, Møller, Anne, Christensen, Karl Bang & Brodersen, John Brandt, 2023, In: Journal of Patient-Reported Outcomes. 7, 1, 15 p., 94.Research output: Contribution to journal › Journal article › Research › peer-review
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Association of the blood eosinophil count with end-organ symptoms
Bjerrum, O. W., Siersma, Volkert Dirk, Hasselbalch, Hans Carl, Lind, B. & Andersen, Christen Bertel L, 2019, In: Annals of Medicine and Surgery. 45, p. 11-18Research output: Contribution to journal › Journal article › Research › peer-review
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Psychosocial consequences of receiving a lung cancer diagnosis by telephone versus in an outpatient clinic. A pragmatic randomized trial
Bodtger, U., Marsaa, K., Brodersen, John Brandt, Siersma, Volkert Dirk, Bang, C. W. & Høegholm, A., 2019, In: European Respiratory Journal. 54, Supplement 63, PA4651.Research output: Contribution to journal › Journal article › Research › peer-review
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Breaking potentially bad news of cancer workup to well-informed patients by telephone versus in-person: A randomised controlled trial on psychosocial consequences
Bodtger, U., Marsaa, K., Siersma, Volkert Dirk, Bang, C. W., Høegholm, A. & Brodersen, John Brandt, 2021, In: European Journal of Cancer Care. 30, 5, 11 p., e13435.Research output: Contribution to journal › Journal article › Research › peer-review
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Validation of the psychosocial consequences of screening in lung cancer questionnaire in the international lung screen trial Australian cohort
Bonney, A., Brodersen, John Brandt, Siersma, Volkert Dirk, See, K., Marshall, H. M., Steinfort, D., Irving, L., Lin, L., Li, J., Pang, S., Fogarty, P., Brims, F., McWilliams, A., Stone, E., Lam, S., Fong, K. M. & Manser, R., 2024, In: Health and Quality of Life Outcomes. 22, 1, 13 p., 10.Research output: Contribution to journal › Journal article › Research › peer-review
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Interpretation of HbA1c in primary care and potential influence of anaemia and chronic kidney disease: an analysis from the Copenhagen Primary Care Laboratory (CopLab) Database
Borg, Rikke, Persson, F., Siersma, Volkert Dirk, Lind, B., de Fine Olivarius, N. & Andersen, Christen Bertel L, 2018, In: Diabetic Medicine. 35, 12, p. 1700-1706 7 p.Research output: Contribution to journal › Journal article › Research › peer-review
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What fraction of women with false-positive screening mammography results reported a higher score than women with normal screening results?
Brodersen, John Brandt & Siersma, Volkert Dirk, 2013, In: Annals of Family Medicine.Research output: Contribution to journal › Comment/debate › Research
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Reply to DeFrank and Brewer
Brodersen, John Brandt & Siersma, Volkert Dirk, 2 Sep 2013Research output: Other contribution › Net publication - Internet publication › Research
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Reply to Consedine
Brodersen, John Brandt & Siersma, Volkert Dirk, 13 Sep 2013Research output: Other contribution › Net publication - Internet publication › Research
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Breast cancer screening: ''reassuring'' the worried well?
Brodersen, John Brandt, Siersma, Volkert Dirk & Ryle, M., May 2011, In: Scandinavian Journal of Public Health. 39, 3, p. 326-332 6 p.Research output: Contribution to journal › Journal article › Research › peer-review
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Long-term psychosocial consequences of false-positive screening mammography – a cohort study with 3-year follow-up.
Brodersen, John Brandt & Siersma, Volkert Dirk, 2013, In: Annals of Family Medicine. 11, p. 106-115 9 p.Research output: Contribution to journal › Journal article › Research › peer-review
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Consequences of screening in cervical cancer: Development and dimensionality of a questionnaire
Brodersen, John Brandt, Siersma, Volkert Dirk & Thorsen, Hanne, 2018, In: BMC Psychology. 6, 1, 39.Research output: Contribution to journal › Journal article › Research › peer-review
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Consequences of screening in abdominal aortic aneurysm: development and dimensionality of a questionnaire
Brodersen, John Brandt, Hansson, A., Johansson, M., Siersma, Volkert Dirk, Langenskiöld, M. & Pettersson, M., 2018, In: Journal of Patient-Reported Outcomes. 2, 12 p., 37.Research output: Contribution to journal › Journal article › Research › peer-review
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Overdiagnosis of lung cancer with low-dose computed tomography screening: meta-analysis of the randomised clinical trials
Brodersen, John Brandt, Voss, T., Martiny, Frederik Handberg Juul, Siersma, Volkert Dirk, Barratt, A. & Heleno, B., 2020, In: Breathe. 16, 1, 11 p., 200013.Research output: Contribution to journal › Review › Research › peer-review
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Urinary markers of nucleic acid oxidation and long-term mortality of newly diagnosed type 2 diabetic patients
Broedbaek, K., Siersma, Volkert Dirk, Henriksen, T., Weimann, A., Petersen, M., Andersen, J. T., Jimenez-Solem, E., Stovgaard, E. S., Hansen, Lars J, Henriksen, J. E., Bonnema, S. J., Olivarius, Niels de Fine & Poulsen, H. E., 2011, In: Diabetes Care. 34, 12, p. 2594-2596 3 p.Research output: Contribution to journal › Journal article › Research › peer-review
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Urinary markers of nucleic acid oxidation and cancer in type 2 diabetes
Broedbaek, K., Siersma, Volkert Dirk, Henriksen, T. F., Weimann, A., Petersen, M., Andersen, J. T., Solem, E. V. J., Hansen, Lars J, Henriksen, J. E., Bonnema, S. J., Olivarius, Niels de Fine, Friis, S. & Poulsen, Henrik Enghusen, Apr 2015, In: Redox Biology. 4, p. 34-39 6 p.Research output: Contribution to journal › Journal article › Research › peer-review
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Urinary albumin and 8-oxo-7,8-dihydroguanosine as markers of mortality and cardiovascular disease during 19 years after diagnosis of type 2 diabetes: A comparative study of two markers to identify high risk patients
Broedbaek, K., Køster-Rasmussen, Rasmus, Siersma, Volkert Dirk, Persson, F., Poulsen, Henrik Enghusen & Olivarius, Niels de Fine, Oct 2017, In: Redox Biology. 13, p. 363-369 7 p.Research output: Contribution to journal › Journal article › Research › peer-review
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Amputations and foot ulcers in patients newly diagnosed with Type 2 diabetes mellitus and observed for 19 years. The role of age, gender and co-morbidity
Bruun, C., Siersma, Volkert Dirk, Guassora, Ann Dorrit, Holstein, P. & Olivarius, Niels de Fine, 2013, In: Diabetic Medicine Online. 30, p. 964-972 9 p.Research output: Contribution to journal › Journal article › Research › peer-review
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Motivation, effort and life circumstances as predictors of foot ulcers and amputations in people with Type 2 diabetes mellitus
Bruun, C., Guassora, Ann Dorrit, Nielsen, Anni Brit Sternhagen, Siersma, Volkert Dirk, Holstein, P. E. & Olivarius, Niels de Fine, 14 Jul 2014, In: Diabetic Medicine. 31, 11, p. 1468-76 9 p.Research output: Contribution to journal › Journal article › Research › peer-review
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Long-term functional and structural outcomes in patients with primary congenital glaucoma — A Danish nationwide study
Brynskov, T., Bach-Holm, Daniella, Kappelgaard, P., Siersma, Volkert Dirk, Pedersen, Karen Bjerg & Kessel, Line, 2024, In: Acta Ophthalmologica. 102, 2, p. 228-237 10 p.Research output: Contribution to journal › Journal article › Research › peer-review
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Association between urinary markers of nucleic acid oxidation and mortality in type 2 diabetes: a population-based cohort study.
Brødbæk, K., Siersma, Volkert Dirk, Henriksen, T., Weimann, A., Petersen, M., Andersen, J. T., jiminez-Solem, E., Hansen, Lars J, Henriksen, J. E., Bonnema, S. J., Olivarius, Niels de Fine & Poulsen, Henrik Enghusen, 2013, In: Diabetes Care. 36, p. 669-676 7 p.Research output: Contribution to journal › Journal article › Research › peer-review
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Cognitive dysfunction after minor surgery in the elderly
Canet, J., Raeder, J., Rasmussen, L. S., Enlund, M., Kuipers, H. M., Hanning, C. D., Jolles, J., Korttila, K., Siersma, Volkert Dirk, Dodds, C., Abildstrøm, H., Sneyd, J. R., Vila, P., Johnson, T. D., Corsini, L. M., Silverstein, J. H., Nielsen, I. K. & Møller, J. T., 2004, In: Acta Anaesthesiologica Scandinavica. 47, p. 1204-1210Research output: Contribution to journal › Journal article › Research › peer-review
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Monocytosis in primary care and risk of haematological malignancies
Christensen, M. E., Siersma, Volkert Dirk, Kriegbaum, Margit, Lind, B. S., Samuelsson, J., Østgård, L. S. G., Grønbæk, Kirsten & Andersen, Christen Bertel L, 2023, In: European Journal of Haematology. 110, 4, p. 362-370 9 p.Research output: Contribution to journal › Journal article › Research › peer-review
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Marked differences in GPs' diagnosis of pneumonia between Denmark and Spain: a cross-sectional study.
Christensen, S. F., Jørgensen, L. C., Cordoba Currea, Gloria Cristina, Llor, C., Siersma, Volkert Dirk & Bjerrum, Lars, 2013, In: Primary Care Respiratory Journal. 22, 4, p. 454-458 5 p.Research output: Contribution to journal › Journal article › Research › peer-review
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Effect of a participatory patient education programme (NExt EDucation) in group-based patient education among Danes with type 2 diabetes
Christoffersen, L. A. N., Hansen, A. K., Pals, R. A. S., Willaing, I., Siersma, Volkert Dirk & Olesen, K., 2020, In: Chronic Illness. 16, 3, p. 226-236 11 p.Research output: Contribution to journal › Journal article › Research › peer-review
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The role of physical and cognitive function in performance of activities of daily living in patients with mild-to-moderate Alzheimer’s disease – a cross-sectional study
Clemmensen, F. K., Hoffmann, K., Siersma, Volkert Dirk, Sobol, N., Beyer, N., Andersen, B. B., Vogel, A., Lolk, A., Gottrup, H., Høgh, Peter, Waldemar, Gunhild, Hasselbalch, Steen & Frederiksen, K. S., 2020, In: BMC Geriatrics. 20, 1, 9 p., 513.Research output: Contribution to journal › Journal article › Research › peer-review
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Assessment of content validity and psychometric properties of VISA-A for Achilles tendinopathy
Comins, J., Siersma, Volkert Dirk, Couppé, Christian, Svensson, R. B., Johansen, F., Malmgaard-Clausen, N. M. & Magnusson, Stig Peter, 2021, In: PLoS ONE. 16, 3, 12 p., 0247152.Research output: Contribution to journal › Journal article › Research › peer-review
- Published
Article three in a series of ten How to develop a condition-specific PROM
Comins, J. D., Brodersen, John Brandt, Siersma, Volkert Dirk, Jensen, J., Hansen, C. F. & Krogsgaard, Michael R., 2021, In: Scandinavian Journal of Medicine & Science in Sports. 31, 6, p. 1216-1224 9 p.Research output: Contribution to journal › Journal article › Research › peer-review
- Published
Choosing the most appropriate PROM for clinical studies in sports medicine: Article two in a series of ten
Comins, J. D., Brodersen, John Brandt, Siersma, Volkert Dirk, Jensen, J., Hansen, C. F. & Krogsgaard, Michael R., 2021, In: Scandinavian Journal of Medicine and Science in Sports. 31, 6, p. 1209-1215 7 p.Research output: Contribution to journal › Journal article › Research › peer-review
- Published
KNEES-ACL has superior responsiveness compared to the most commonly used patient-reported outcome measures for anterior cruciate ligament injury
Comins, J. D., Siersma, Volkert Dirk, Lind, M., Jakobsen, B. W. & Krogsgaard, Michael R., 2018, In: Knee Surgery, Sports Traumatology, Arthroscopy. 26, 8, p. 2438-2446 9 p.Research output: Contribution to journal › Journal article › Research › peer-review
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Prescribing style and variation in antibiotic prescriptions for sore throat: cross-sectional study across six countries
Cordoba Currea, Gloria Cristina, Siersma, Volkert Dirk, Lopez-Valcarcel, B. G., Bjerrum, Lars, Llor, C., Aabenhus, Rune Munck & Mäkelä, Marjukka, 29 Jan 2015, In: B M C Family Practice. 16, p. 1-8 8 p., 7.Research output: Contribution to journal › Journal article › Research › peer-review
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Effects of Heavy Slow Resistance Training Combined With Corticosteroid Injections or Tendon Needling in Patients With Lateral Elbow Tendinopathy A 3-Arm Randomized Double-Blinded Placebo-Controlled Study
Couppé, Christian, Døssing, S., Bulow, P. M., Siersma, Volkert Dirk, Zilmer, C. K., Bang, C. W., Høffner, Rikke, Kracht, M., Hogg, P., Edstrom, G., Kjær, Michael & Magnusson, Stig Peter, 2022, In: American Journal of Sports Medicine. 50, 10, p. 2787-2796 10 p.Research output: Contribution to journal › Journal article › Research › peer-review
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Health-Related Quality-of-Life in patients with chronic rheumatic disease after a multidisciplinary rehabilitation regimen
Couppé, C., Comins, J., Beyer, N., Hansen, S. E., Stodolsky, D. S. & Siersma, Volkert Dirk, Feb 2017, In: Quality of Life Research. 26, 2, p. 381–391 11 p.Research output: Contribution to journal › Journal article › Research › peer-review
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Use of diagnostic tests and the appropriateness of the treatment decision in patients with suspected urinary tract infection in primary care in Denmark - Observational study
Cordoba Currea, Gloria Cristina, Holm, Anne, Sørensen, Tina Møller, Siersma, Volkert Dirk, Sandholdt, H., Makela, M., Frimodt-Møller, N. & Bjerrum, Lars, 2018, In: BMC Family Practice. 19, 1, 7 p., 65.Research output: Contribution to journal › Journal article › Research › peer-review
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Maternal stress and placental function, a study using questionnaires and biomarkers at birth
Dahlerup, B. R., Egsmose, E. L., Siersma, Volkert Dirk, Mortensen, Erik Lykke, Hedegaard, M., Knudsen, Lisbeth E. & Mathiesen, Line, 2018, In: PLOS ONE. 13, 11, 18 p., e0207184.Research output: Contribution to journal › Journal article › Research › peer-review
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Use and diagnostic outcomes of cancer patient pathways in Denmark - is the place of initial diagnostic work-up an important factor?
Damhus, Christina Sadolin, Siersma, Volkert Dirk, Birkmose, Anna Rubach, Dalton, Susanne Oksbjerg & Brodersen, John Brandt, 2022, In: BMC Health Services Research. 22, 1, 12 p., 130.Research output: Contribution to journal › Journal article › Research › peer-review
- Published
Colon cancer diagnosed in patients with non-specific symptoms - comparisons between diagnostic paradigms
Damhus, Christina Sadolin, Siersma, Volkert Dirk, Birkmose, Anna Rubach, Stovring, H., Dalton, Susanne Oksbjerg & Brodersen, John Brandt, 2023, In: Acta Oncologica. 62, 3, p. 272-280 9 p.Research output: Contribution to journal › Journal article › Research › peer-review
- Published
Psychosocial consequences of a three-month follow-up after receiving an abnormal lung cancer CT-screening result: A longitudinal survey
Damhus, Christina Sadolin, Quentin, J. G., Malmqvist, J., Siersma, Volkert Dirk & Brodersen, John Brandt, 2021, In: Lung Cancer. 155, p. 46-52 7 p.Research output: Contribution to journal › Journal article › Research › peer-review
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Psychosocial consequences of screening-detected abdominal aortic aneurisms: a cross-sectional study
Damhus, Christina Sadolin, Siersma, Volkert Dirk, Hansson, A., Bang, C. W. & Brodersen, John Brandt, 2021, In: Scandinavian Journal of Primary Health Care. Supplement. 39, 4, p. 459-465 7 p.Research output: Contribution to journal › Journal article › Research › peer-review
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Non-specific symptoms and signs of cancer: different organisations of a cancer patient pathway in Denmark
Damhus, Christina Sadolin, Siersma, Volkert Dirk, Dalton, Susanne Oksbjerg & Brodersen, John Brandt, 2021, In: Scandinavian Journal of Primary Health Care. 9 p.Research output: Contribution to journal › Journal article › Research › peer-review
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The association of a past childbirth experience with a variety of early physical and mental symptoms in subsequent pregnancies
Davidsen, A. S., Birkmose, Anna Rubach, Kragstrup, Jakob, Siersma, Volkert Dirk & Ertmann, Ruth Kirk, 2022, In: Midwifery. 112, 7 p., 103406.Research output: Contribution to journal › Journal article › Research › peer-review
- Published
Acetabular retroversion does not affect outcome in primary hip arthroscopy for femoroacetabular impingement
Dippmann, Christian Andreas, Siersma, Volkert Dirk, Overgaard, Søren & Krogsgaard, Michael R., 2022, In: Knee Surgery, Sports Traumatology, Arthroscopy. 30, p. 3535–3543 9 p.Research output: Contribution to journal › Journal article › Research › peer-review
- Published
Symptoms, signs and complications in newly diagnosed type 2 diabetic patients, and their relationship to glycaemia, blood pressure and weight
Drivsholm, Thomas, Olivarius, Niels de Fine, Nielsen, Anni Brit Sternhagen & Siersma, Volkert Dirk, 2005, In: Diabetologia. 48, p. 210-214Research output: Contribution to journal › Journal article › Research › peer-review
- Published
The effectiveness of a semi-tailored facilitator-based intervention to optimise chronic care management in general practice: A randomised controlled trial
Due, Tina Drud, Thorsen, Thorkil, Kousgaard, Marius Brostrøm, Siersma, Volkert Dirk & Waldorff, Frans Boch, 2014, In: BMC Family Practice. 15, p. 1-12 12 p., 65.Research output: Contribution to journal › Journal article › Research › peer-review
- Published
How well do general practitioners know their elderly patients' social relations and feelings of loneliness?
Due, Tina Drud, Sandholdt, H., Siersma, Volkert Dirk & Waldorff, Frans Boch, 26 Feb 2018, In: BMC Family Practice. 19, 8 p., 34.Research output: Contribution to journal › Journal article › Research › peer-review
- Published
Antibiotic treatment of community-acquired pneumonia: a questionnaire survey in Danish general practice
Eggers-Kaas, L., Bisgaard, L., Thomsen, J. L., Jarbøl, D. E., Llor, C., Christensen, M. B., Bjerrum, Lars, Siersma, Volkert Dirk & Hansen, M. P., 2022, In: Basic & Clinical Pharmacology & Toxicology. 130, 1, p. 151-157 7 p.Research output: Contribution to journal › Journal article › Research › peer-review
- Published
Associations between plasma concentrations of PCB 28 and possible indoor exposure sources in Danish school children and mothers
Egsmose, E. L., Bräuner, E. V., Frederiksen, M., Mørck, T. A., Siersma, Volkert Dirk, Hansen, P. W., Nielsen, F., Grandjean, P. & Knudsen, Lisbeth E., Feb 2016, In: Environment International. 87, p. 13-19 7 p.Research output: Contribution to journal › Journal article › Research › peer-review
- Published
No effect of anti-TNF-α agents on the surgical stress response in patients with inflammatory bowel disease undergoing bowel resections: a prospective multi-center pilot study
El-Hussuna, A., Qvist, N., Zangenberg, M. S., Langkilde, A., Siersma, Volkert Dirk, Hjort, S. & Gögenur, I., 2018, In: BMC Surgery. 18, 10 p., 91.Research output: Contribution to journal › Journal article › Research › peer-review
- Published
Reconstruction of the anterior cruciate- and anterolateral ligament deficient knee with a modified iliotibial graft reduces instability more than with an intra-articular hamstring graft
Eljaja, S. B., Konradsen, L., Siersma, Volkert Dirk, Athwal, K., Amis, A. A. & Krogsgaard, Michael R., 2020, In: Knee Surgery, Sports Traumatology, Arthroscopy. 28, p. 2526–2534 9 p.Research output: Contribution to journal › Journal article › Research › peer-review
- Published
Documenting organisational development in general practice using a group-based assessment method: the Maturity Matrix
Eriksson, T., Siersma, Volkert Dirk, Løgstrup, L., Buch, M., Elwyn, G. & Edwards, A., Jul 2010, In: Quality and Safety in Healthcare. 19, 5, p. 1-7 6 p.Research output: Contribution to journal › Journal article › Research › peer-review
- Published
The majority of sick children receive paracetamol during the winter
Ertmann, Ruth Kirk, Møller, J. J., Waldorff, Frans Boch, Siersma, Volkert Dirk, Reventlow, Susanne & Söderström, M., 2012, In: Danish Medical Journal. 59, 12, p. A4555Research output: Contribution to journal › Journal article › Research › peer-review
- Published
Selection bias in general practice research: analysis in a cohort of pregnant Danish women
Ertmann, Ruth Kirk, Nicolaisdottir, Dagny Ros, Kragstrup, Jakob, Siersma, Volkert Dirk, Overbeck, Gritt, Wilson, Philip Michael John & Lutterodt, Melissa C., 2020, In: Scandinavian Journal of Primary Health Care. 38, 4, p. 464-472 9 p.Research output: Contribution to journal › Journal article › Research › peer-review
- Published
Mental vulnerability before and depressive symptoms during pregnancy and postpartum: a prospective population-based cohort study from general practice
Ertmann, Ruth Kirk, Lyngsøe, B. K., Nicolaisdottir, Dagny Ros, Kragstrup, Jakob & Siersma, Volkert Dirk, 2022, In: Nordic Journal of Psychiatry. 76, 4, p. 243-249 7 p.Research output: Contribution to journal › Journal article › Research › peer-review
- Published
Sleep complaints in early pregnancy. A cross-sectional study among women attending prenatal care in general practice
Ertmann, Ruth Kirk, Nicolaisdottir, Dagny Ros, Kragstrup, Jakob, Siersma, Volkert Dirk & Lutterodt, Melissa C., 2020, In: B M C Pregnancy and Childbirth. 20, 9 p., 123.Research output: Contribution to journal › Journal article › Research › peer-review
- Published
What factors are most important for the development of the maternal-fetal relationship? A prospective study among pregnant women in Danish general practice
Ertmann, Ruth Kirk, Bang, C. W., Kriegbaum, Margit, Væver, Mette Skovgaard, Kragstrup, Jakob, Siersma, Volkert Dirk, Wilson, Philip Michael John, Lutterodt, Melissa C. & Smith-Nielsen, Johanne, 2021, In: BMC Psychology. 9, 1, 9 p., 2.Research output: Contribution to journal › Journal article › Research › peer-review
- Published
Physical discomfort in early pregnancy and postpartum depressive symptoms
Ertmann, Ruth Kirk, Nicolaisdottir, Dagny Ros, Kragstrup, Jakob, Siersma, Volkert Dirk, Lutterodt, Melissa C. & Bech, P., 2019, In: Nordic Journal of Psychiatry. 73, 3, p. 200-206 7 p.Research output: Contribution to journal › Journal article › Research › peer-review
- Published
Infants' symptoms of illness assessed by parents: Impact and implications
Ertmann, Ruth Kirk, Siersma, Volkert Dirk, Reventlow, Susanne & Söderström, M., 1 Jun 2011, In: Scandinavian Journal of Primary Health Care. 29, 2, p. 67-74 8 p.Research output: Contribution to journal › Journal article › Research › peer-review
ID: 3512987
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Maternal stress and placental function, a study using questionnaires and biomarkers at birth
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Clinical indications for antibiotic use in Danish general practice: results from a nationwide electronic prescription database
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Biomonitoring of Danish school children and mothers including biomarkers of PBDE and glyphosate
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