Volkert Dirk Siersma

Volkert Dirk Siersma

!!Statistiker, External Lecturer

ORCID: 0000-0003-1941-2681

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  1. Published

    Diabetic complications do not hamper improvement of health-related quality of life over the course of treatment of diabetic foot ulcers: the Eurodiale study

    Siersma, Volkert Dirk, Thorsen, Hanne, Holstein, P. E., Kars, M., Apelqvist, J., Jude, E. B., Piaggesi, A., Bakker, K., Edmonds, M., Jirkovská, A., Mauricio, D., Reike, H., Spraul, M., Uccioli, L., Urbancic, V., van Acker, K., van Baal, J. & Schaper, N. C., Jul 2017, In: Journal of Diabetes and its Complications. 31, 7, p. 1145-1151 7 p.

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

  2. Published

    Visual impairment and mortality in patients with type 2 diabetes

    Siersma, Volkert Dirk, Køster-Rasmussen, Rasmus, Bruun, C., Olivarius, Niels de Fine & Brunes, A., 2019, In: B M J Open Diabetes Research & Care. 7, 1, 9 p., e000638.

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

  3. Published

    A Coefficient of Association Between Categorical Variables With Partial or Tentative Ordering of Categories

    Siersma, Volkert Dirk & Kreiner, Svend, 2009, In: Sociological Methods & Research. 38, 2, p. 265-286 21 p.

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

  4. Published

    The effectiveness of computer reminders versus postal reminders for improving quality assessment for point-of-care testing in primary care: a randomized controlled trial

    Siersma, Volkert Dirk, Kousgaard, Marius Brostrøm, Reventlow, Susanne, Ertmann, Ruth Kirk, Felding, P. & Waldorff, Frans Boch, Feb 2015, In: Journal of Evaluation in Clinical Practice. 21, 1, p. 13-20 8 p.

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

  5. Published

    Monte Carlo Evaluation of Model Search in Graphical Models for Ordinal Data

    Siersma, Volkert Dirk & Kreiner, Svend, 2008, Heidelberg: Physica-Verlag.

    Research output: Book/Report › Report › Research

  6. Published

    Health-Related Quality of Life Predicts Major Amputation and Death, but Not Healing, in People With Diabetes Presenting With Foot Ulcers: The Eurodiale Study

    Siersma, Volkert Dirk, Thorsen, Hanne, Holstein, P. E., Kars, M., Apelqvist, J., Jude, E. B., Piaggesi, A., Bakker, K., Edmonds, M., Jirkovska, A., Mauricio, D., Ragnarson Tennvall, G., Reike, H., Spraul, M., Uccioli, L., Urbancic, V., Acker, K., Baal, K. & Schaper, N. C., Mar 2014, In: Diabetes Care. 37, 3, p. 694-700 7 p.

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

  7. Published

    Simulating from graphical models for ordinal categorical data

    Siersma, Volkert Dirk & Kreiner, Svend, 2007, Museum Tusculanum.

    Research output: Book/Report › Report › Research

  8. Published

    A coefficient of association between categorical variables with partial or tentative ordering of categories

    Siersma, Volkert Dirk & Kreiner, Svend, 2007, Juli, 2007 [Biostatistisk Afdeling rapport 07-10] ed. Museum Tusculanum.

    Research output: Book/Report › Report › Research

  9. Published

    Studies in the interaction between disease development and interventions

    Siersma, Volkert Dirk, 2008, In: Maanedsskrift for Praktisk Laegegerning. p. -

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

  10. Published

    Importance Sampling Strategies for Off-Policy LSTD(1)

    Siersma, Volkert Dirk, 2009, København: Museum Tusculanum. (Research Report, Biostatistisk Afdeling, Institut for Folkesundhedsvidenskab.; No. 9/12).

    Research output: Book/Report › Report › Research

  11. Published

    Monte Carlo and bootstrap evaluation of model search in graphical models for ordinal data

    Siersma, Volkert Dirk & Kreiner, Svend, 2010.

    Research output: Contribution to conference › Conference abstract for conference › Research

  12. 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

  13. Published

    Quantitative Electroencephalography Analyzed by Statistical Pattern Recognition as a Diagnostic and Prognostic Tool in Mild Cognitive Impairment: Results from a Nordic Multicenter Cohort Study

    Schjønning Nielsen, M., Simonsen, A. H., Siersma, Volkert Dirk, Engedal, K., Jelic, V., Andersen, B. B., Naik, M., Hasselbalch, Steen & Høgh, Peter, 2018, In: Dementia and Geriatric Cognitive Disorders. Extra. 8, 3, p. 426-438 13 p.

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

  14. 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

  15. 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

  16. Published

    Quality assessment in general practice: diagnosis and antibiotic treatment of acute respiratory tract infections

    Saust, Laura Trolle, Bjerrum, Lars, Siersma, Volkert Dirk, Arpi, M. & Hansen, M. P., 2018, In: Scandinavian Journal of Primary Health Care. 36, 4, p. 372-379 8 p.

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

  17. Published

    Prehospital treatment of opioid overdose in Copenhagen--is it safe to discharge on-scene?

    Rudolph, S. S., Jehu, G., Nielsen, S. L., Nielsen, K., Siersma, Volkert Dirk & Rasmussen, L. S., 2011, In: Resuscitation. 82, 11, p. 1414-1418 5 p.

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

  18. Published

    Changes in HbA1cduring the first six years after the diagnosis of Type 2 diabetes mellitus predict long-term microvascular outcomes

    Rozing, Maarten Pieter, Møller, Anne, Aabenhus, Rune Munck, Siersma, Volkert Dirk, Rasmussen, K. & Køster-Rasmussen, Rasmus, 2019, In: PLoS ONE. 14, 11, e0225230.

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

  19. 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

  20. Published

    Follicular lymphoma of the ocular adnexal region: A nation-based study

    Rasmussen, P. K., Ralfkiaer, E., Prause, J. U., Sjö, Lene Dissing, Specht, Lena, Rossing, H. H., Siersma, Volkert Dirk & Heegaard, Steffen, Mar 2015, In: Acta Ophthalmologica. 93, 2, p. 184-191 8 p.

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

  21. Published

    Malignant lymphoma of the lacrimal gland: a nation-based study

    Rasmussen, P. K., Ralfkiaer, E., Prause, J. U., Sjö, Lene Dissing, Siersma, Volkert Dirk & Heegaard, Steffen, 2011, In: Archives of Ophthalmology. 129, 10, p. 1275-80 6 p.

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

  22. Published

    Diffuse large B-cell lymphoma of the ocular adnexal region: A nation-based study

    Rasmussen, P. K., Ralfkiaer, E., Prause, J. U., Sjö, Lene Dissing, Toft, Peter Bjerre, Siersma, Volkert Dirk & Heegaard, Steffen, 2013, In: Acta Ophthalmologica. 91, p. 163-169 7 p.

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

  23. Published

    Postoperative cognitive dysfunction: true deterioration versus random variation

    Rasmussen, L. S. & Siersma, Volkert Dirk, 2004, In: Acta Anaesthesiologica Scandinavica. 48, p. 1137-1143

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

  24. Published

    Does anaesthesia cause postoperative cognitive dysfunction? A randomised study of regional versus general anaesthesia in 438 elderly patients

    Rasmussen, L. S., Johnson, T. D., Kuipers, H. M., Kristensen, D., Siersma, Volkert Dirk, Vila, P., Jolles, J., Papaioannaou, A., Abildstrøm, H., Silverstein, J. H., Bonal, J. A., Raeder, J., Nielsen, I. K., Korttila, K., Munoz, L., Dodds, C., Hanning, C. D. & Møller, J. T., 2003, In: Acta Anaesthesiologica Scandinavica. 47, p. 260-266

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

  25. Published

    Is peri-operative cortisol secretion related to post-operative cognitive dysfunction

    Rasmussen, L. S., O'Brien, J. T., Silverstein, J. H., Johnson, T. W., Siersma, Volkert Dirk, Canet, J., Jolles, J., Hanning, C. D., Kuipers, H. M., Abildstrøm, H., Papaionnou, A., Raeder, J., Yli-Hankala, A., Sneyd, J. R., Munoz, L. & Møller, J. T., 2005, In: Acta Anaesthesiologica Scandinavica. 49, p. 1225-1231

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

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ID: 3512987