Volkert Dirk Siersma

Volkert Dirk Siersma

!!Statistiker, External Lecturer

ORCID: 0000-0003-1941-2681

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  1. 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

  2. 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

  3. 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

  4. 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

  5. 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

  6. 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

  7. 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

  8. 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

  9. 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

  10. 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

  11. 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

  12. 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

  13. 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

  14. 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

  15. 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

  16. 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

  17. 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

  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

    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

  20. 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

  21. 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

  22. 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

  23. 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

  24. 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

  25. 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

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