Volkert Dirk Siersma

Volkert Dirk Siersma

!!Statistiker, External Lecturer

ORCID: 0000-0003-1941-2681

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  1. Published

    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

  2. Published

    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

  3. Published

    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

  4. Published

    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

  5. Published

    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

  6. Published

    Apolipoprotein E Genotype and Cognitive Dysfunction after Noncardiac Surgery

    Abildstrøm, H., Christiansen, M., Siersma, Volkert Dirk & Rasmussen, L. S., 2004, In: Anesthesiology. 101, p. 855-861

    Research output: Contribution to journal › Journal article › Research › peer-review

  7. Published

    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

  8. Published

    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

  9. Published

    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

  10. Published

    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

  11. Published

    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

  12. Published

    The Potential of The Copenhagen Primary Care Laboratory (CopLab) Database

    Andersen, Christen Bertel L, Siersma, Volkert Dirk & Olivarius, Niels de Fine, 2016.

    Research output: Contribution to conference › Conference abstract for conference › Research › peer-review

  13. Published

    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

  14. Published

    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. 843-847

    Research output: Contribution to journal › Journal article › Research › peer-review

  15. Published

    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

  16. Published

    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

  17. Published

    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. 566-575

    Research output: Contribution to journal › Journal article › Research › peer-review

  18. Published

    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

  19. Published

    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

  20. Published

    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. 1446-1453

    Research output: Contribution to journal › Journal article › Research › peer-review

  21. Published

    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

  22. Published

    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

  23. Published

    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. 168-176

    Research output: Contribution to journal › Journal article › Research › peer-review

  24. Published

    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

  25. Published

    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

  26. Published

    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

  27. Published

    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

  28. Published

    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

  29. Published

    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

  30. Published

    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

  31. Published

    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

  32. Published

    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

  33. Published

    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

  34. Published

    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

  35. Published

    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

  36. Published

    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

  37. Published

    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

  38. Published

    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

  39. Published

    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

  40. Published

    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

  41. Published

    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

  42. Published

    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

  43. Published

    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

  44. Published

    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

  45. Published

    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. 11-18

    Research output: Contribution to journal › Journal article › Research › peer-review

  46. Published

    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

  47. Published

    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

  48. Published

    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

  49. Published

    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

  50. Published

    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

  51. Published

    Reply to DeFrank and Brewer

    Brodersen, John Brandt & Siersma, Volkert Dirk, 2 Sep 2013

    Research output: Other contribution › Net publication - Internet publication › Research

  52. Published

    Reply to Consedine

    Brodersen, John Brandt & Siersma, Volkert Dirk, 13 Sep 2013

    Research output: Other contribution › Net publication - Internet publication › Research

  53. Published

    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

  54. Published

    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

  55. Published

    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

  56. Published

    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

  57. Published

    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

  58. Published

    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

  59. Published

    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

  60. Published

    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

  61. Published

    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

  62. Published

    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

  63. Published

    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

  64. Published

    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

  65. Published

    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. 1204-1210

    Research output: Contribution to journal › Journal article › Research › peer-review

  66. Published

    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

  67. Published

    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

  68. Published

    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

  69. Published

    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

  70. Published

    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

  71. 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

  72. 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

  73. 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

  74. Published

    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

  75. Published

    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

  76. Published

    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

  77. Published

    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

  78. Published

    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

  79. Published

    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

  80. 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

  81. 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

  82. Published

    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

  83. Published

    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

  84. Published

    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

  85. 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

  86. 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. 210-214

    Research output: Contribution to journal › Journal article › Research › peer-review

  87. 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

  88. 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

  89. 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

  90. 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

  91. 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

  92. 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

  93. 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

  94. 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. A4555

    Research output: Contribution to journal › Journal article › Research › peer-review

  95. 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

  96. 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

  97. 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

  98. 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

  99. 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

  100. 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

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