Volkert Dirk Siersma

Volkert Dirk Siersma

!!Statistiker, External Lecturer

ORCID: 0000-0003-1941-2681

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  1. Published

    Breast cancer screening implementation and reassurance.

    Østerø, J., Siersma, Volkert Dirk & Brodersen, John Brandt, 2013, In: European Journal of Public Health. 24, 2, p. 258-263

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

  2. Published

    Infant crying problems related to maternal depressive and anxiety symptoms during pregnancy: a prospective cohort study

    Ölmestig, T. K., Siersma, Volkert Dirk, Birkmose, Anna Rubach, Kragstrup, Jakob & Ertmann, Ruth Kirk, 2021, In: BMC Pregnancy and Childbirth. 21, 1, 11 p., 777.

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

  3. Published

    Lacrimal gland lesions in Denmark between 1974 and 2007

    von Holstein, Sarah Linea, Therkildsen, M. H., Prause, J. U., Stenman, G., Siersma, Volkert Dirk & Heegaard, Steffen, 2013, In: Acta Ophthalmologica. 91, 4, p. 349-354 5 p.

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

  4. Published

    Constitutive and ligand-induced TCR degradation

    von Essen, Marina Rode, Bonefeld, Charlotte Menne, Siersma, Volkert Dirk, Rasmussen, A. B., Lauritsen, J. P. H., Nielsen, B. L. & Geisler, Carsten, 2004, In: Journal of Immunology. 173, 1, p. 384-93 9 p.

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

  5. Published

    Formal home help services and institutionalization

    Yamada, Y., Siersma, Volkert Dirk, Avlund, K. & Vass, Mikkel, 2012, In: Archives of Gerontology and Geriatrics. 54, p. e52-e56

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

  6. Published

    The effect of structured personal care on diabetes symptoms and self-rated health over 14 years after diabetes diagnosis

    Willadsen, Tora Grauers, Siersma, Volkert Dirk, Nielsen, Anni Brit Sternhagen, Køster-Rasmussen, Rasmus, Guassora, Ann Dorrit, Jarbol, D. E., Eusebi, P., Malterud, Kirsti, Reventlow, Susanne & Olivarius, Niels de Fine, 2018, In: Primary Care Diabetes. 12, 4, p. 354-363 10 p.

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

  7. 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

  8. Published

    Multimorbidity and mortality: A 15-year longitudinal registry-based nationwide Danish population study

    Willadsen, Tora Grauers, Siersma, Volkert Dirk, Nicolaisdottir, Dagny Ros, Køster-Rasmussen, Rasmus, Jarbøl, D. E., Reventlow, Susanne, Mercer, S. & Olivarius, Niels de Fine, 2018, In: Journal of Comorbidity. 8, p. 1-9 9 p., 8.

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

  9. 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

  10. Published

    Risk factors for 48-hours mortality after prehospital treatment of opioid overdose

    Wichmann, S., Nielsen, S. L., Siersma, Volkert Dirk & Rasmussen, L. S., 2013, In: Emergency Medicine Journal. 30, 3, p. 223-225 3 p.

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

  11. Published

    Risk factors for 48-hours mortality after prehospital treatment of opioid overdose.

    Wichmann, S., Nielsen, S. L., Siersma, Volkert Dirk, Rasmussen, L. S. & Rasmussen, L. S., Nov 2011, In: Resuscitation. 82, 11, p. 1414-1418 4 p.

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

  12. 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

  13. Published

    Subjective memory complaints in general practice predicts future dementia: a 4-year follow-up study.

    Waldorff, Frans Boch, Vogel, Asmus, Siersma, Volkert Dirk & Waldemar, Gunhild, 2012, In: International Journal of Geriatric Psychiatry. 27, 11, p. 1180-1188 8 p.

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

  14. Published

    The effect of reminder letters on the uptake of an e-learning programme on dementia: a randomized trial in general practice

    Waldorff, Frans Boch, Siersma, Volkert Dirk, Nielsen, B., Steenstrup, A. P. & Bro, F., 2009, In: Family Practice. 26, 6, p. 466-471 6 p.

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

  15. Published

    Full journal publication of abstracts presented at the Nordic Congress of General Practice in 2009 and 2011

    Waldorff, Frans Boch, Petersen, K., Vinther, S., Sandholdt, H., Siersma, Volkert Dirk & Andersen, John Sahl, 2017, In: Scandinavian Journal of Primary Health Care. 35, 1, p. 84-88 5 p.

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

  16. Published

    Association between subjective memory complaints and nursing home placement: a four-year follow-up

    Waldorff, Frans Boch, Siersma, Volkert Dirk & Waldemar, Gunhild, 2009, In: International Journal of Geriatric Psychiatry. 24, 6, p. 602-9 7 p.

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

  17. Published

    Factors associated with a clinically relevant reduction in menopausal symptoms of a standardized acupuncture approach for women with bothersome menopausal symptoms

    Waldorff, Frans Boch, Bang, C. W., Siersma, Volkert Dirk, Brodersen, John Brandt & Lund, K. S., 2021, In: BMC Complementary Medicine and Therapies. 21, 1, 7 p., 29.

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

  18. Published

    Association between subjective memory complaints and health care utilisation: a three-year follow up

    Waldorff, Frans Boch, Siersma, Volkert Dirk & Waldemar, Gunhild, 2009, In: BMC Geriatrics. 9, p. 43

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

  19. Published

    The efficacy of computer reminders on external quality assessment for point-of-care testing in Danish general practice: rationale and methodology for two randomized trials

    Waldorff, Frans Boch, Siersma, Volkert Dirk, Ertmann, Ruth Kirk, Kousgaard, Marius Brostrøm, Nielsen, A. S., Felding, P., Mosbæk, N., Hjortsø, E. & Reventlow, Susanne, 1 Jan 2011, In: Implementation Science. 6, p. 79

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

  20. Published

    Efficacy of psychosocial intervention in patients with mild Alzheimer's disease: the multicentre, rater blinded, randomised Danish Alzheimer Intervention Study (DAISY)

    Waldorff, Frans Boch, Buss, D. V., Eckermann, A., Rasmussen, M. L., Keiding, N., Rishoj, S., Siersma, Volkert Dirk, Sorensen, J., Sorensen, L. V., Vogel, A. & Waldemar, Gunhild, 2012, In: BMJ. 345, p. e4693

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

  21. Published

    The Danish Alzheimer Intervention Study: Rationale, Study Design and Baseline Characteristics of the Cohort

    Waldemar, Gunhild, Waldorff, Frans Boch, Buss, D. V., Eckermann, A., Keiding, N., Rish›j, S., Siersma, Volkert Dirk, S›rensen, J., S›rensen, L. V. & Vogel, A., 2011, In: Neuroepidemiology. 36, 1, p. 52-61 10 p.

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

  22. Published

    The Danish Alzheimer intervention study: rationale, study design and baseline characteristics of the cohort

    Waldemar, Gunhild, Waldorff, Frans Boch, Buss, D. V., Eckermann, A., Keiding, N., Rishøj, S., Siersma, Volkert Dirk, Sørensen, J., Sørensen, L. V. & Vogel, A., 1 Jan 2011, In: Neuroepidemiology. 36, 1, p. 52-61 10 p.

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

  23. Published

    Specific location of ocular adnexal lymphoma and mortality: an international multicentre retrospective study

    Vest, S. D., Coupland, S. E., Esmaeli, B., Finger, P. T., Graue, G. F., Grossniklaus, H. E., Hindso, T. G., Holm, F., Honavar, S. G., Khong, J. J., Kirkegaard, M. K., McKelvie, P. A., Mikkelsen, L. H., Mulay, K., Rasmussen, P. K., Siersma, V., Sjö, L. D., Sniegowski, M. C., Thuro, B. A., Vemuganti, G. K. & 1 others, Heegaard, Steffen, 2023, In: British Journal of Ophthalmology. 107, 9, p. 1231-1238 8 p.

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

  24. Published

    Patients newly diagnosed with clinical type 2 diabetes mellitus but presenting with HbA1c within normal range: 19-year mortality and clinical outcomes

    Veloso, A. G., Siersma, Volkert Dirk, Heldgaard, P. E. & Olivarius, Niels de Fine, 2013, In: Primary Care Diabetes. 7, 1, p. 33-38

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

  25. Published

    Antibiotic prescribing in Danish general practice in the elderly population from 2010 to 2017

    Jensen, Maria Louise Veimer, Aabenhus, Rune Munck, Holzknecht, Barbara Juliane, Bjerrum, Lars, Jensen, J. N., Siersma, Volkert Dirk & Cordoba Currea, Gloria Cristina, 2021, In: Scandinavian Journal of Primary Health Care. 39, 4, p. 498-505 8 p.

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

  26. Published

    Domain-specific cognitive dysfunction after cardiac surgery. A secondary analysis of a randomized trial

    Vedel, A. G., Holmgaard, F., Siersma, Volkert Dirk, Langkilde, Annika Reynberg, Paulson, Olaf B., Ravn, H. B., Nilsson, J. C. & Rasmussen, L. S., 2019, In: Acta Anaesthesiologica Scandinavica. 63, 6, p. 730-738 9 p.

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

  27. Published

    Ophthalmic symptoms, clinical signs and diagnostic delay in infants diagnosed with brain tumours in Denmark between 2007 and 2017

    Turanzas, N. J., Mathiasen, René, Heegaard, Steffen, Schmiegelow, Kjeld, Sehested, A., Holtz, J. K., Siersma, Volkert Dirk, Nissen, K. R. & von Holstein, Sarah Linea, 2024, In: Acta Ophthalmologica. 102, 3, p. 334-341 8 p.

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

  28. Published

    The SOFIA pilot study: assessing feasibility and fidelity of coordinated care to reduce excess mortality and increase quality of life in patients with severe mental illness in a general practice setting; a cluster-randomised pilot trial

    Jensen, Katrine Tranberg, Jønsson, Alexandra Brandt Ryborg, Due, Tina Drud, Siersma, Volkert Dirk, Brodersen, John Brandt, Bissenbakker, Kristine Henderson, Martiny, Frederik Handberg Juul, Davidsen, Annette Sofie, Kjellberg, P. K., Doherty, K., Mercer, S. W., Nielsen, Maria Haahr, Reventlow, Susanne, Møller, Anne, Rozing, M. & SOFIA Study Group, S. S. G., 2023, In: BMC Primary Care. 24, 1, 11 p., 188.

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

  29. Published

    Severity and Bothersomeness of Urinary Tract Infection Symptoms in Women before and after Menopause

    Teglbrænder-Bjergkvist, S., Siersma, Volkert Dirk & Holm, Anne, 2023, In: Antibiotics. 12, 7, 9 p.

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

  30. Published

    The role of the anterolateral ligament in ACL insufficient and reconstructed knees on rotary stability: A biomechanical study on human cadavers

    Tavlo, M., Eljaja, S., Tranum-Jensen, Jørgen, Siersma, Volkert Dirk & Krogsgaard, Michael R., Aug 2016, In: Scandinavian Journal of Medicine & Science in Sports. 26, 8, p. 960-966

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

  31. Published

    Hunde med tegn på cystitis overbehandles

    Sørensen, Tina Møller, Bjørnvad, Charlotte Reinhard, Cordoba Currea, Gloria Cristina, Damborg, Peter Panduro, Guardabassi, Luca, Siersma, Volkert Dirk, Bjerrum, Lars & Jessen, Lisbeth Rem, Jun 2018, In: Dyrlægen; fagmagasin for dyrlæger, veterinærstuderende og veterinærsygeplejersker. 12, 3, p. 22-26 5 p.

    Research output: Contribution to journal › Journal article › Communication

  32. Published

    Pre-test probability of urinary tract infection in dogs with clinical signs of lower urinary tract disease

    Sørensen, Tina Møller, Holmslykke, M., Nordlund, M., Siersma, Volkert Dirk & Jessen, Lisbeth Rem, 2019, In: Veterinary Journal. 247, p. 65-70 6 p.

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

  33. Published

    Effects of Diagnostic Work-Up on Medical Decision-Making for Canine Urinary Tract Infection: An Observational Study in Danish Small Animal Practices

    Sørensen, Tina Møller, Bjørnvad, Charlotte Reinhard, Cordoba Currea, Gloria Cristina, Damborg, Peter Panduro, Guardabassi, Luca, Siersma, Volkert Dirk, Bjerrum, Lars & Jessen, Lisbeth Rem, 2018, In: Journal of Veterinary Internal Medicine. 32, 2, p. 743-751

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

  34. Published

    Uptake of signposting to web-based resources: pregnant women’s use of a preventive web-based intervention

    Sørensen, E. R., Rasmussen, Ida Scheel, Overbeck, Gritt, Siersma, Volkert Dirk, Appel, Clara Lundmark & Wilson, Philip Michael John, 2023, In: BMC Primary Care. 24, 11 p., 189.

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

  35. 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

  36. Published

    Spending time outside to reduce infections at preschool may be an overrated strategy

    Söderström, M., Siersma, Volkert Dirk & Boldemann, C., 2018, In: Acta Paediatrica. 107, 9, p. 1652 1 p.

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

  37. 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

  38. Published

    Mental healthcare utilisation among Danish formerly deployed military personnel and their civilian counterparts: a cohort study

    Stoltenberg, Christian Ditlev G, Vedtofte, M. S., Nielsen, Anni Brit Sternhagen, Andersen, S. B., Siersma, Volkert Dirk, Christensen, K. S. & Osler, Merete, 2024, In: European Journal of Psychotraumatology. 15, 1, 12 p., 2296188.

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

  39. Published

    Is postoperative cognitive dysfunction a risk factor for dementia?

    Steinmetz, Jacob, Siersma, Volkert Dirk, Kessing, Lars Vedel, Rasmussen, L. S. & Group, T. I., 2013, In: British Journal of Anaesthesia. 110 Suppl, 1, p. i92-i97 6 p.

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

  40. Published

    Neurosurgical Admission Later Than 4 h After the Emergency Call Does Not Result in Worse Long-Term Outcome in Subarachnoid Haemorrhage

    Sonne, A., Andersen, J. B., Eskesen, V., Lippert, F., Waldorff, Frans Boch, Siersma, Volkert Dirk, Lohse, Nicolai Rasch & Rasmussen, L. S., 2021, In: Frontiers in Neurology. 12

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

  41. Published

    Criteria-based dispatch of emergency medical services in non-traumatic subarachnoid haemorrhage

    Sonne, A., Andersen, Jesper, Eskesen, V., Lippert, F., Waldorff, Frans Boch, Bang, C. W., Siersma, Volkert Dirk, Lohse, Nicolai Rasch & Rasmussen, L. S., 2021, In: Danish Medical Journal. 68, 9, 9 p., 02210152.

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

  42. Published

    Psychosocial consequences among women with false-positive results after mammography screening in Norway

    Solbjør, M., Forsmo, S., Skolbekken, J., Siersma, Volkert Dirk & Brodersen, John Brandt, 2018, In: Scandinavian Journal of Primary Health Care. 36, 4, p. 380-389 10 p.

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

  43. Published

    Effect of aerobic exercise on physical performance in patients with Alzheimer’s disease

    Sobol, N. A., Hoffmann, K., Frederiksen, K. S., Vogel, A., Vestergaard, K., Brændgaard, H., Gottrup, H., Lolk, A., Wermuth, L., Jakobsen, S., Laugesen, L., Gergelyffy, R., Høgh, P., Bjerregaard, E., Siersma, Volkert Dirk, Andersen, B. B., Johannsen, P., Waldemar, G., Hasselbalch, S. G. & Beyer, N., 2016, In: Alzheimer's & Dementia. 12, 12, p. 1207–1215 9 p.

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

  44. Published

    Change in Fitness and the Relation to Change in Cognition and Neuropsychiatric Symptoms After Aerobic Exercise in Patients with Mild Alzheimer's Disease

    Sobol, N. A., Dall, C. H., Høgh, Peter, Hoffmann, K., Frederiksen, K. S., Vogel, A., Siersma, Volkert Dirk, Waldemar, Gunhild, Hasselbalch, Steen & Beyer, N., 2018, In: Journal of Alzheimer's Disease. 65, 1, p. 137-145 9 p.

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

  45. Published

    Chronic hyperglycemia, hypercholesterolemia, and metabolic syndrome are associated with risk of tendon injury

    Skovgaard, D., Siersma, Volkert Dirk, Klausen, S. B., Visnes, H., Haukenes, I., Bang, C. W., Bager, P., Gravare Silbernagel, K., Gaida, J., Magnusson, Stig Peter, Kjær, Michael & Couppé, Christian, 2021, In: Scandinavian Journal of Medicine & Science in Sports. 31, 9, p. 1822-1831 11 p.

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

  46. Published

    Studies in the interactions between disease development and interventions

    Siersma, Volkert Dirk, 2008, Museum Tusculanum.

    Research output: Book/Report › Ph.D. thesis › Research

  47. Published

    Analysis with repeatedly measured binary item response data by ad hoc Rasch scales

    Siersma, Volkert Dirk & Eusebi, P., 2013, Rasch Models in Health. Christensen, K. B., Kreiner, S. & Mesbah, M. (eds.). Wiley, p. 257-275 18 p. (Wiley-ISTE, London).

    Research output: Chapter in Book/Report/Conference proceeding › Book chapter › Research

  48. Published

    The importance of factors determining the low health-related quality of life in people presenting with a diabetic foot ulcer – the Eurodiale study.

    Siersma, Volkert Dirk, Thorsen, H., Holstein, P., Kars, M., Apelqvist, J., Jude, E., Piagessi, A., Bakker, K., Edmonds, M., Jirkovska, A., Mauricio, D., Tennvall, G., Reike, H., Spraul, M., Uccioli, L., Urbancic, V., Acker, K., Baal, J. & Schaper, N., 2013, In: Diabetic Medicine. 30, 11, p. 1382-1387

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

  49. Published

    Multivariable modelling for meta-epidemiological assessment of the association between trial quality and treatment effects estimated in randomized clinical trials

    Siersma, Volkert Dirk, Als-Nielsen, B., Chen, W., Hilden, Jørgen, Gluud, L. L. & Gluud, C. N., 2007, In: Statistics in Medicine. 26, 14, p. 2745-2758 13 p.

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

  50. Published

    Subjective memory complaints in primary care patients and death from all causes: a four-year follow-up

    Siersma, Volkert Dirk, Waldemar, Gunhild & Waldorff, Frans Boch, Mar 2013, In: Scandinavian Journal of Primary Health Care. 31, 1, p. 7-12

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

  51. 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

  52. 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

  53. 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

  54. 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

  55. 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

  56. 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

  57. Published

    Simulating from graphical models for ordinal categorical data

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

    Research output: Book/Report › Report › Research

  58. 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

  59. 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

  60. 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

  61. 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

  62. 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

  63. 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

  64. 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

  65. 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

  66. 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

  67. 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

  68. 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

  69. 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

  70. 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

  71. 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

  72. 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

  73. 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

  74. 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

  75. 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

  76. Published

    Psychosocial consequences of false positives in the Danish Lung Cancer CT Screening Trial: A nested matched cohort study

    Rasmussen, J. F., Siersma, Volkert Dirk, Malmqvist, J. & Brodersen, John Brandt, 2020, In: BMJ Open. 10, 6, e034682.

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

  77. Published

    Omkostningsanalyse af sundhedsudgifter ved Danish Lung Cancer Screening Trial, DLCST - en registerundersøgelse

    Rasmussen, J. F., Brodersen, John Brandt, Siersma, Volkert Dirk, Saghir, Z., Dirksen, A. & Pedersen, J. H., 2012, København: Ministeriet for Sundhed og Forebyggelse.

    Research output: Book/Report › Report › Research

  78. Published

    Healthcare costs in the Danish randomised controlled lung cancer CT-screening trial: A registry study

    Rasmussen, J. F., Siersma, Volkert Dirk, Pedersen, J. H., Heleno, B., Saghir, Z. & Brodersen, John Brandt, Mar 2014, In: Lung Cancer. 83, 3, p. 347-355 9 p.

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

  79. Published

    Decreasing incidence of foot ulcer among patients with type 1 and type 2 diabetes in the period 2001-2014

    Rasmussen, A., Almdal, Thomas Peter, Nielsen, A. A., Nielsen, K. E., Jørgensen, M. E., Hangaard, S., Siersma, Volkert Dirk & Holstein, P. E., Aug 2017, In: Diabetes Research and Clinical Practice. 130, p. 221-228 8 p.

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

  80. Published

    Conjunctival intraepithelial neoplasia and carcinoma: distinct clinical and histological features in relation to human papilloma virus status

    Ramberg, Ingvild Margrethe Sellæg, Toft, Peter Bjerre, Georgsen, J. B., Siersma, Volkert Dirk, Funding, M., Jensen, D. H., von Buchwald, Christian & Heegaard, Steffen, 2021, In: British Journal of Ophthalmology. 105, 6, p. 878-883 6 p.

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

  81. Published

    Multimorbidity in patients with low back pain in Danish chiropractic practice: a cohort study

    Rafn, B. S., Hartvigsen, J., Siersma, Volkert Dirk & Andersen, John Sahl, 2023, In: Chiropractic and Manual Therapies. 31, 1, 11 p., 8.

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

  82. Published

    Subjective memory complaints and future depression in primary care patients: A four-year follow-up study

    Quaade, A. S., Davidsen, Annette Sofie, Siersma, Volkert Dirk, Waldemar, Gunhild & Waldorff, Frans Boch, 1 Nov 2018, In: General Hospital Psychiatry. 55, p. 4-9 6 p.

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

  83. Published

    The development of multimorbidity during 16 years after diagnosis of type 2 diabetes

    Pouplier, S., Olsen, M. Å., Willadsen, Tora Grauers, Sandholdt, H., Siersma, Volkert Dirk, Andersen, Christen Bertel L & Olivarius, Niels de Fine, 2018, In: Journal of Comorbidity. 8, 1, p. 1-9 9 p.

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

  84. Published

    Educational intervention and functional decline among older people: The modifying effects of social capital

    Poulsen, T., Siersma, Volkert Dirk, Lund, Rikke, Christensen, Ulla, Vass, Mikkel & Avlund, K., May 2014, In: Scandinavian Journal of Public Health. 42, 3, p. 295-303 9 p.

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

  85. Published

    Impact of Social Capital on 8-year Mortality Among Older People in 34 Danish Municipalities

    Poulsen, T., Siersma, Volkert Dirk, Christensen, Ulla, Lund, Rikke, Vass, Mikkel & Avlund, K., 2012, In: Journal of Aging and Health. 24, p. 1202-1222 20 p.

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

  86. Published

    Predictors of lower-extremity amputation in patients with an infected diabetic foot ulcer

    Pickwell, K., Siersma, Volkert Dirk, Kars, M., Apelqvist, J., Bakker, K., Edmonds, M., Holstein, P., Jirkovska, A., Jude, E., Mauricio, D., Piaggesi, A., Ragnarson Tennvall, G., Reike, H., Spraul, M., Uccioli, L., Urbancic, V., van Acker, K., van Baal, J. & Schaper, N., May 2015, In: Diabetes Care. 38, 5, p. 852-857 6 p.

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

  87. Published

    Diabetic foot disease: impact of ulcer location on ulcer healing.

    Pickwell, K., Siersma, Volkert Dirk, Kars, M., Holstein, P. & Schaper, N., 2013, In: Diabetes - Metabolism: Research and Reviews (Online). 29, 5, p. 377-387

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

  88. Published

    Minor amputation does not negatively affect health-related quality of life as compared with conservative treatment in patients with a diabetic foot ulcer: An observational study

    Pickwell, K., Siersma, Volkert Dirk, Kars, M., Apelqvist, J., Bakker, K., Edmonds, M., Holstein, P., Jirkovska, A., Jude, E., Mauricio, D., Piaggesi, A., Reike, H., Spraul, M., Uccioli, L., Urbancic, V., Acker, K. V., Baal, J. V. & Schaper, N., Mar 2017, In: Diabetes - Metabolism: Research and Reviews (Print Edition). 33, 3, 6 p., e2867.

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

  89. Published

    Self-rated versus Caregiver-rated Health for Patients with Mild Dementia as Predictors of Patient Mortality

    Phung, T. K. T., Siersma, Volkert Dirk, Vogel, Asmus, Waldorff, Frans Boch & Waldemar, Gunhild, 2018, In: American Journal of Geriatric Psychiatry. 26, 3, p. 375-385 11 p.

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

  90. Published

    A three-year follow-up on the efficacy of psychosocial interventions for patients with mild dementia and their caregivers: the multicentre, rater-blinded, randomized Danish Alzheimer Intervention Study (DAISY).

    Phung, K. T. T., Waldorff, Frans Boch, Buss, D. V., Eckermann, A., Keiding, N., Rishøj, S., Siersma, Volkert Dirk, Sørensen, J., Søgaard, R., Sørensen, L. V., Vogel, Asmus & Waldemar, Gunhild, 2013, In: B M J Open. 3, 11

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

  91. Published

    Dementia and road traffic accidents among non-institutionalized older people in Denmark: A Danish register-based nested case-control study

    Petersen, Jindong Ding, Siersma, Volkert Dirk, Christensen, R. D., Storsveen, M. M., Nielsen, C. T., Vass, Mikkel & Waldorff, Frans Boch, 2019, In: Scandinavian Journal of Public Health. 47, 2, p. 221-228 8 p.

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

  92. Published

    Clinical management of hip fractures in elderly patients with dementia and postoperative 30-day mortality: A population-based cohort study

    Petersen, Jindong Ding, Siersma, Volkert Dirk, Wehberg, S., Nielsen, C. T., Viberg, B. & Waldorff, Frans Boch, 2020, In: Brain and Behavior. 10, 11, 10 p., e01823.

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

  93. Published

    Dementia and traffic accidents: a Danish register-based cohort study

    Petersen, Jindong Ding, Siersma, Volkert Dirk, Nielsen, C., Vass, Mikkel & Waldorff, Frans Boch, 2016, In: JMIR Research Protocols. 5, 3, p. e191

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

  94. Published

    Major depressive symptoms increase 3-year mortality rate in patients with mild dementia

    Petersen, Jindong Ding, Waldorff, Frans Boch, Siersma, Volkert Dirk, Phung, T. K. T., Bebe, Anna & Waldemar, Gunhild, 6 Apr 2017, In: International Journal of Alzheimer's Disease. 2017, p. 1-9 9 p., 7482094.

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

  95. Published

    The risk of fall accidents for home dwellers with dementia—A register- and population-based case-control study

    Petersen, Jindong Ding, Siersma, Volkert Dirk, Christensen, R. D. P., Storsveen, M. M., Nielsen, C. T. & Waldorff, Frans Boch, 2018, In: Alzheimer's and Dementia: Diagnosis, Assessment and Disease Monitoring. 10, p. 421-428 8 p.

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

  96. 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

  97. 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

  98. Published

    Age-related prevalence and clinical significance of neutropenia - isolated or combined with other cytopenias: Real world data from 373 820 primary care individuals

    Palmblad, J., Siersma, Volkert Dirk, Lind, B., Bjerrum, O. W., Hasselbalch, Hans Carl & Andersen, Christen Bertel L, 2020, In: American Journal of Hematology. 95, 5, p. 521-528 8 p.

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

  99. 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

  100. Published

    Depression and anxiety symptoms in pregnant women in Denmark during COVID-19

    Overbeck, Gritt, Andersen, Julie Høgsgaard, mxb897, mxb897, Rasmussen, Ida Scheel, Kragstrup, Jakob, Siersma, Volkert Dirk, Wilson, Philip Michael John & Ertmann, Ruth Kirk, 2021, In: Scandinavian Journal of Public Health. 49, 7, p. 721-729 9 p.

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

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ID: 3512987