Volkert Dirk Siersma

Volkert Dirk Siersma

!!Statistiker, External Lecturer

ORCID: 0000-0003-1941-2681

Publication year:
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301 - 350 out of 380Page size: 50
  1. 2021
  2. Published

    Real-world outcomes for a complete nationwide cohort of more than 3200 teriflunomide-treated multiple sclerosis patients in The Danish Multiple Sclerosis Registry

    Papp, V., Buron, M. D., Siersma, Volkert Dirk, Rasmussen, P. V., Illes, Z., Kant, M., Hilt, C., Mezei, Z., Roshanisefat, H., Sejbaek, T., Weglewski, Arkadiusz, van Wingerden, J., Geertsen, S. S., Bramow, S., Sellebjerg, Finn Thorup & Magyari, M., 2021, In: PLoS ONE. 16, 5, 16 p., 0250820.

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

  3. Published

    Seasonal variation in biopsy-proven giant cell arteritis in Eastern Denmark from 1990-2018

    Konig, E. B., Stormly Hansen, M., Foldager, J., Siersma, Volkert Dirk, Loft, A., Terslev, Lene, Møller Døhn, U., Radmer Jensen, M., Wiencke, Anne Katrine Riise, Faber, Carsten, Hamann, Steffen & Heegaard, Steffen, 2021, In: Acta Ophthalmologica. 99, 5, p. 527-532 6 p.

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

  4. Published

    Symptom burden in multimorbidity: A population-based combined questionnaire and registry study from Denmark

    Willadsen, Tora Grauers, Siersma, Volkert Dirk, Nicolaisdottir, Dagny Ros, Jarbol, D., Guassora, Ann Dorrit, Reventlow, Susanne & Køster-Rasmussen, Rasmus, 2021, In: BMJ Open. 11, 4, e041877.

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

  5. Published

    The SOFIA pilot trial: a cluster-randomized trial of coordinated, co-produced care to reduce mortality and improve quality of life in people with severe mental illness in the general practice setting

    Rozing, Maarten Pieter, Jønsson, Alexandra Brandt Ryborg, Køster-Rasmussen, Rasmus, Due, Tina Drud, Brodersen, John Brandt, Bissenbakker, Kristine Henderson, Siersma, Volkert Dirk, Mercer, S. W., Guassora, Ann Dorrit, Kjellberg, J., Kjellberg, P. K., Nielsen, Maria Haahr, Christensen, I., Bardram, J. E., Martiny, Frederik Handberg Juul, Møller, Anne, Reventlow, Susanne & SOFIA Study Grp, S. S. G., 2021, In: Pilot and Feasibility Studies. 7, 1, 13 p., 168.

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

  6. Published

    Trend in antibiotic prescription to children aged 0-6 years old in the capital region of Denmark between 2009 and 2018: Differences between municipalities and association with socioeconomic composition

    Larsen, S. B., Jensen, Maria Louise Veimer, Bjerrum, Lars, Siersma, Volkert Dirk, Bang, C. W. & Jensen, J. N., 2021, In: The European Journal of General Practice. 27, 1, p. 257-263 7 p.

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

  7. 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

  8. 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

  9. Published

    What is a PROM and why do we need it? Article 1 in a series of 10

    Krogsgaard, Michael R., Brodersen, John Brandt, Christensen, Karl Bang, Siersma, Volkert Dirk, Kreiner, Svend, Jensen, J., Hansen, C. F. & Comins, J. D., 2021, In: Scandinavian Journal of Medicine and Science in Sports. 31, 5, p. 967-971 5 p.

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

  10. Published

    Consequences of screening in colorectal cancer (COS-CRC): development and dimensionality of a questionnaire

    Malmqvist, J., Siersma, Volkert Dirk, Bang, C. W. & Brodersen, John Brandt, Dec 2021, In: BMC Psychology. 9, 1, 16 p., 7.

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

  11. 2022
  12. 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

  13. 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

  14. 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

  15. Published

    Changes in leisure time physical activity unrelated to subsequent body weight changes, but body weight changes predicted future activity

    Petersen, Jindong Ding, Siersma, Volkert Dirk, Andersen, M. K. K. & Heitmann, Berit, 2022, In: Journal of Sports Sciences. 40, 3, p. 288-298 11 p.

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

  16. 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

  17. Published

    Diagnosis and Antibiotic Treatment of Urinary Tract Infections in Danish General Practice: A Quality Assessment

    Saust, Laura Trolle, Siersma, Volkert Dirk, Lykkegaard, J., Bjerrum, Lars & Hansen, M. P., 2022, In: Antibiotics. 11, 12, 10 p., 1759.

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

  18. 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

  19. 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

  20. 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

  21. Published

    Four of five frequently used orthopedic PROMs possess inadequate content validity: a COSMIN evaluation of the mHHS, HAGOS, IKDC-SKF, KOOS and KNEES-ACL

    Hansen, C. F., Jensen, J., Odgaard, Anders, Siersma, Volkert Dirk, Comins, J. D., Brodersen, John Brandt & Krogsgaard, Michael R., 2022, In: Knee Surgery, Sports Traumatology, Arthroscopy. 30, p. 3602–3615 14 p.

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

  22. Published

    Incidence of new-onset type 2 diabetes after cancer: A Danish cohort study

    Sylow, Lykke, Grand, Mia Klinten, von Heymann, A., Persson, F., Siersma, Volkert Dirk, Kriegbaum, Margit, Andersen, Christen Bertel L & Johansen, Christoffer, 2022, In: Diabetes Care. 45, 6, p. e105-e106 2 p.

    Research output: Contribution to journal › Letter › Research › peer-review

  23. 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

  24. Published

    Influence of Antimicrobial Resistance on the Course of Symptoms in Female Patients Treated for Uncomplicated Cystitis Caused by Escherichia coli

    Waldorff, M. S., Bjerrum, Lars, Holm, Anne, Siersma, Volkert Dirk, Bang, C., Llor, C. & Cordoba Currea, Gloria Cristina, 2022, In: Antibiotics. 11, 2, 10 p., 188.

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

  25. 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

  26. Published

    Long-term psychosocial consequences of breast cancer screening – a matched cohort study

    Gram, Emma Grundtvig, Brodersen, John Brandt & Siersma, Volkert Dirk, 2022, In: BMJ Evidence-Based Medicine. 27, Supplement 1, 1 p.

    Research output: Contribution to journal › Conference abstract in journal › Research

  27. 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

  28. Published

    Mental well-being during stages of COVID-19 lockdown among pregnant women and new mothers

    Overbeck, Gritt, Rasmussen, Ida Scheel, Siersma, Volkert Dirk, Kragstrup, Jakob, Ertmann, Ruth Kirk & Wilson, Philip Michael John, 2022, In: BMC Pregnancy and Childbirth. 22, 1, 7 p., 92.

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

  29. 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

  30. Published

    P05-13 Associations between occupational physical activity and progression of carotid atherosclerosis among middle-aged women, are those with pre-existing cardiovascular disease more vulnerable?

    Korshoj, M., Allesoe, K., Mortensen, Ole Steen, Siersma, Volkert Dirk & Kauhanen, J., 2022, In: European Journal of Public Health. 32, 1 p.

    Research output: Contribution to journal › Conference abstract in journal › Research › peer-review

  31. Published

    Physical activity paradox: could inflammation be a key factor?

    Feinberg, J. B., Møller, Anne, Siersma, Volkert Dirk, Bruunsgaard, Helle & Mortensen, Ole Steen, 2022, In: British Journal of Sports Medicine. 56, 21, p. 1224-1229

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

  32. 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

  33. 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

  34. Published

    Short and long-term psychosocial consequences of participating in a colorectal cancer screening programme: a matched longitudinal study

    Malmqvist, J., Siersma, Volkert Dirk, Hestbech, Mie Sara, Bang, C. W., Nicolaisdottir, Dagny Ros & Brodersen, John Brandt, 2022, In: BMJ Evidence-Based Medicine. 27, 2, 10 p.

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

  35. Published

    Social relations and contact with general practitioner in a middle-aged Danish population: a prospective register- and survey-based cohort study

    Mikkelsen, A. S. B., Lund, Rikke, Siersma, Volkert Dirk, Jørgensen, Terese Sara Høj, Christensen, Ulla & Kristiansen, Maria, 2022, In: BMC Health Services Research. 22, 481, 481.

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

  36. 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

  37. 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

  38. Published

    The effect of disease onset chronology on mortality among patients with multimorbidity: A Danish nationwide register study

    Willadsen, Tora Grauers, Siersma, Volkert Dirk, Nicolaisdottir, Dagny Ros, Køster-Rasmussen, Rasmus, Reventlow, Susanne & Rozing, Maarten Pieter, 2022, In: J Multimorb Comorb .. 12, 10 p.

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

  39. 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

  40. 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

  41. 2023
  42. Published

    A cross-sectional study of the association between family conflicts and children's health: Lolland-Falster Health Study

    Søndergaard, Elisabeth, Reventlow, Susanne, Siersma, Volkert Dirk, Nicolaisdottir, Dagny Ros, Jepsen, R., Rasmussen, K. & Møller, Anne, 2023, In: Child: Care, Health and Development. 49, 6, p. 972-984 13 p.

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

  43. 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

  44. 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

  45. 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

  46. 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

  47. 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

  48. Published

    Development of quality indicators for the diagnosis and treatment of urinary tract infections in general practice: a RAND appropriateness method

    Saust, Laura Trolle, Siersma, Volkert Dirk, Bjerrum, Lars & Hansen, M. P., 2023, In: BMJ Open Quality. 12, 2, 8 p.

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

  49. Published

    Evaluation of the Danish version of the prenatal parental reflective functioning questionnaire in early pregnancy as a screening tool

    Schwartz, M., Rasmussen, Ida Scheel, Wilson, Philip Michael John, Overbeck, Gritt & Siersma, Volkert Dirk, 2023, In: Infant Mental Health Journal. 44, 3, 19 p.

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

  50. Published

    Factors in early pregnancy predicting pregnancy-related pain in the second and third trimester

    Ertmann, Ruth Kirk, Nicolaisdottir, Dagny Ros, Siersma, Volkert Dirk, Overbeck, Gritt, de Voss, Sarah Strøyer, Modin, F. A. & Lutterodt, Melissa C., 2023, In: Acta Obstetricia et Gynecologica Scandinavica. 102, 10, p. 1269-1280 12 p.

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

  51. Published

    Family wellbeing in general practice: a study protocol for a cluster-randomised trial of the web-based resilience programme on early child development

    Overbeck, Gritt, Kragstrup, Jakob, Gørtz, Mette, Rasmussen, Ida Scheel, mxb897, mxb897, Siersma, Volkert Dirk, de Voss, Sarah Strøyer, Ertmann, Ruth Kirk, Shahrzad, S., Appel, Clara Lundmark & Wilson, Philip Michael John, 2023, In: Trials. 24, 1, 12 p., 7.

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

  52. Published

    Labour market attachment dynamics in patients with concussion: a Danish nationwide register-based cohort study

    Graff, H. J., Siersma, Volkert Dirk, Møller, Anne, Waldorff, Frans Boch, Modin, F. A. & Rytter, Hana Malá, 2023, In: BMC Public Health. 23, 1, 11 p., 2493.

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

  53. Published

    Long-term psychosocial consequences of false-positive screening mammography: a cohort study with follow-up of 12–14 years in Denmark

    Gram, Emma Grundtvig, Siersma, Volkert Dirk & Brodersen, John Brandt, 2023, In: BMJ Open. 8 p.

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

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ID: 3512987