Volkert Dirk Siersma

Volkert Dirk Siersma

!!Statistiker, External Lecturer

ORCID: 0000-0003-1941-2681

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  1. 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

  2. Published

    Standard complication screening information can be used for risk assessment for first time foot ulcer among patients with type 1 and type 2 diabetes

    Hangaard, S., Rasmussen, A., Almdal, Thomas Peter, Nielsen, A. A., Nielsen, K. E., Siersma, Volkert Dirk & Holstein, P., 2019, In: Diabetes Research and Clinical Practice. 151, p. 177-186 10 p.

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

  3. 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

  4. Published

    Structured personal care of type 2 diabetes: a 19 year follow-up of the study Diabetes Care in General Practice (DCGP).

    Hansen, Lars J, Siersma, Volkert Dirk, Beck-Nielsen, H. & Olivarius, Niels de Fine, 2013, In: Diabetologia. 56, 6, p. 1243-1253

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

  5. 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

  6. Published

    Studies in the interactions between disease development and interventions

    Siersma, Volkert Dirk, 2008, Museum Tusculanum.

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

  7. 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

  8. 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

  9. 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

  10. Published

    Sustained effects of a brief and standardised acupuncture approach on menopausal symptoms: post hoc analysis of the ACOM randomised controlled trial

    Lund, K. S., Siersma, Volkert Dirk, Bang, C. W., Brodersen, John Brandt & Waldorff, Frans Boch, 2020, In: Acupuncture in Medicine. 38, 6, p. 396-406 11 p.

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

  11. 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

  12. Published

    Symptom-based screening tool for asthma syndrome among young children in Uganda

    Nantanda, R., Siersma, Volkert Dirk, Ndeezi, G., Tumwine, J. K. & Ostergaard, M. S., 2020, In: Primary Care Respiratory Journal. 30, 6 p., 30.

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

  13. 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

  14. Published

    The Astonishing Hypothesis (Letter)

    Olivarius, Niels de Fine & Siersma, Volkert Dirk, 2012, In: Primary Care Diabetes.

    Research output: Contribution to journal › Letter › Research

  15. 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

  16. 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

  17. 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

  18. Published

    The Danish contribution to the European DEMOCOPHES project: A description of cadmium, cotinine and mercury levels in Danish mother-child pairs and the perspectives of supplementary sampling and measurements

    Mørck, T. A., Nielsen, F., Nielsen, J. K. S., Jensen, J. F., Hansen, P. W., Hansen, A. K., Christoffersen, L. A. N., Siersma, V. D., Larsen, I. H., Hohlmann, L. K., Skaanild, M. T., Frederiksen, H., Biot, P., Casteleyn, L., Kolossa-Gehring, M., Schwedler, G., Castaño, A., Angerer, J., Koch, H. M., Esteban, M. & 12 others, Schoeters, G., Den Hond, E., Exley, K., Sepai, O., Bloemen, L., Joas, R., Joas, A., Fiddicke, U., Lopez, A., Cañas, A., Aerts, D. & Knudsen, Lisbeth E., Aug 2015, In: Environmental Research. 141, p. 96-105 10 p.

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

  19. Published

    The Diagnostic and Prognostic Value of a Dual-Tasking Paradigm in a Memory Clinic

    Nielsen, M. S., Simonsen, A. H., Siersma, Volkert Dirk, Hasselbalch, Steen & Høgh, Peter, 2018, In: Journal of Alzheimer's Disease. 61, 3, p. 1189-1199 11 p.

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

  20. 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

  21. 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

  22. 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

  23. 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

  24. 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

  25. 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

  26. 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

  27. 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

  28. 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

  29. 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

  30. Published

    The effect of structured personal care on RNA oxidation: A 19-year follow-up of the randomized trial Diabetes Care in General Practice (DCGP)

    Kjær, L. K., Grand, Mia Klinten, Siersma, Volkert Dirk, Brødbæk, K., Jørgensen, Anders, Olivarius, Niels de Fine & Poulsen, Henrik Enghusen, 2019, In: Journal of Diabetes and its Complications. 33, 3, p. 202-207

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

  31. 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

  32. 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

  33. Published

    The effectiveness of computer reminders for improving quality assessment for point-of-care testing in general practice - a randomized controlled trial.

    Kousgaard, Marius Brostrøm, Siersma, Volkert Dirk, Reventlow, Susanne, Ertmann, Ruth Kirk, Felding, P. & Waldorff, Frans Boch, 2013, In: Implementation Science. 8, 47

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

  34. 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

  35. Published

    The effectiveness of structured personal care of type 2 diabetes on recurrent outcomes: a 19 year follow-up of the study Diabetes Care in General Practice (DCGP)

    Lundström, H. M., Siersma, Volkert Dirk, Nielsen, Anni Brit Sternhagen, Brodersen, John Brandt, Reventlow, Susanne, Andersen, Per Kragh & Olivarius, Niels de Fine, Jun 2014, In: Diabetologia. 57, 6, p. 1119-23 5 p.

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

  36. Published

    The efficacy of acupuncture on menopausal symptoms (ACOM study): protocol for a randomised study

    Lund, K. S., Brodersen, John Brandt, Siersma, Volkert Dirk & Waldorff, Frans Boch, Mar 2017, In: Danish Medical Journal. 64, 3, p. 1-6 6 p., A5344.

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

  37. 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

  38. Published

    The excess mortality of patients with diabetes and concurrent psychiatric illness is markedly reduced by structured personal diabetes care. A 19-year follow up of the randomized controlled study Diabetes Care in General Practice (DCGP).

    Larsen, J. R., Siersma, Volkert Dirk, Davidsen, Annette Sofie, Waldorff, Frans Boch, Reventlow, Susanne & Olivarius, Niels de Fine, 2016, In: General Hospital Psychiatry. 38, p. 42-52 11 p.

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

  39. Published

    The feasibility of C-reactive protein point-of-care testing to reduce overuse of antibiotics in children with acute respiratory tract infections in rural Kyrgyzstan: A Pilot Study

    Isaeva, E., Akylbekov, A., Bloch, J., Poulsen, A., Kurtzhals, Jørgen, Siersma, Volkert Dirk, Sooronbaev, T., Aabenhus, Rune Munck & Kjærgaard, J., 2024, In: Pediatric health, medicine and therapeutics. 15, p. 67-76 10 p.

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

  40. Published

    The impact of HPV vaccination on future cervical screening: a simulation study of two birth cohorts in Denmark

    Hestbech, Mie Sara, Lynge, Elsebeth, Kragstrup, Jakob, Siersma, Volkert Dirk, Vazquez-Prada Baillet, M. & Brodersen, John Brandt, 14 Aug 2015, In: B M J Open. 5, 8, p. 1-7 7 p., e007921.

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

  41. Published

    The impact of a physician-staffed helicopter on outcome in patients admitted to a stroke unit: a prospective observational study

    Funder, K. S., Rasmussen, L. S., Lohse, N., Hesselfeldt, R., Siersma, Volkert Dirk, Gyllenborg, J., Wulffeld, S., Hendriksen, O. M., Lippert, F. K. & Steinmetz, Jacob, 23 Feb 2017, In: Scandinavian Journal of Trauma, Resuscitation and Emergency Medicine. 25, p. 1-9 9 p., 18.

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

  42. 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

  43. Published

    The impact of changes in self-rated general health on 28-year mortality among middle-aged Danes

    Nielsen, Anni Brit Sternhagen, Siersma, Volkert Dirk, Kreiner, Svend, Hiort, L. C., Drivsholm, Thomas, Eplov, L. F. & Hollnagel, Hanne, 2009, In: Scandinavian Journal of Primary Health Care. 27, 3, p. 160-166 7 p.

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

  44. Published

    The impact of gender on the long-term morbidity and mortality of patients with type 2 diabetes receiving structured personal care: A 13-year follow-up study

    Krag, M. Ø., Hasselbalch, L., Siersma, Volkert Dirk, Nielsen, Anni Brit Sternhagen, Reventlow, Susanne, Malterud, Kirsti & Olivarius, Niels de Fine, Feb 2016, In: Diabetologia. 59, 2, p. 275-285 11 p.

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

  45. Published

    The impact of influences in a medical screening programme invitation: a randomized controlled trial

    Jauernik, Christian Patrick, Rahbek, O. J., Ploug, T., Siersma, Volkert Dirk & Brodersen, John Brandt, 2023, In: European Journal of Public Health. 33, 3, 6 p.

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

  46. Published

    The impact of patients' involvement in cooking on their mortality and morbidity: A 19-year follow-up of patients newly diagnosed with type 2 diabetes mellitus.

    Jandorf, S., Siersma, Volkert Dirk, Køster-Rasmussen, Rasmus, Olivarius, Niels de Fine & Waldorff, Frans Boch, 2015, In: Scandinavian Journal of Primary Health Care. 33, 1, p. 33-39 7 p.

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

  47. Published

    The implications of mammography screening on health care use and its associated financial costs

    Gram, Emma Grundtvig, Siersma, Volkert Dirk, Nicolaisdottir, Dagny Ros & Brodersen, John Brandt, 2023, 1 p.

    Research output: Working paper › 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

    The long-term psychosocial consequences of screen-detected ductal carcinoma in situ and invasive breast cancer

    Gram, Emma Grundtvig, Manso, T. F. R., Heleno, B., Siersma, Volkert Dirk, Rogvi, J. Á. & Brodersen, John Brandt, 2023, In: The Breast. 70, p. 41-48 8 p.

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

  50. Published

    The long-term psychosocial impact of screen-detected DCIS – further support to rename DCIS

    Gram, Emma Grundtvig, Siersma, Volkert Dirk & Brodersen, John Brandt, 2023, In: BMJ Evidence-Based Medicine. 28, Supplement 1

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

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ID: 3512987