Volkert Dirk Siersma
!!Statistiker, External Lecturer
Forskningsenheden for Almen Praksis
Øster Farimagsgade 5
1353 København K
Section of Biostatistics
Øster Farimagsgade 5 opg. B
1353 København K
- 2017
- Published
Biomonitoring of Danish school children and mothers including biomarkers of PBDE and glyphosate
Knudsen, Lisbeth E., Hansen, P. W., Mizrak, S., Hansen, H. K., Mørck, T. A., Nielsen, F., Siersma, Volkert Dirk & Mathiesen, Line, 26 Sep 2017, In: Reviews on Environmental Health. 32, 3, p. 279-290 12 p.Research output: Contribution to journal › Journal article › Research › peer-review
- 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
- 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
- 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
- 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
- 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
- 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
- 2016
- Published
Antibiotic prescribing in Danish general practice 2004-13
Aabenhus, Rune Munck, Siersma, Volkert Dirk, Hansen, M. P. & Bjerrum, Lars, Aug 2016, In: Journal of Antimicrobial Chemotherapy. 71, 8, p. 2286-2294 9 p.Research output: Contribution to journal › Journal article › Research › peer-review
- Published
Prevalence and clinical significance of neutropenia discovered in routine complete blood cell counts: a longitudinal study
Andersen, Christen Bertel L, Tesfa, D., Siersma, Volkert Dirk, Sandholdt, H., Hasselbalch, H., Bjerrum, O. W., Felding, P., Lind, B., Olivarius, Niels de Fine & Palmblad, J., 2016, In: Journal of Internal Medicine. 279, 6, p. 566-575Research output: Contribution to journal › Journal article › Research › peer-review
- Published
- 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
- Published
Associations between plasma concentrations of PCB 28 and possible indoor exposure sources in Danish school children and mothers
Egsmose, E. L., Bräuner, E. V., Frederiksen, M., Mørck, T. A., Siersma, Volkert Dirk, Hansen, P. W., Nielsen, F., Grandjean, P. & Knudsen, Lisbeth E., Feb 2016, In: Environment International. 87, p. 13-19 7 p.Research output: Contribution to journal › Journal article › Research › peer-review
- Published
Perioperative hyperoxia - Long-term impact on cardiovascular complications after abdominal surgery, a post hoc analysis of the PROXI trial
Fonnes, S., Gogenur, I., Sondergaard, E. S., Siersma, Volkert Dirk, Jørgensen, Lars Nannestad, Wetterslev, J. & Meyhoff, Christian Sylvest, 15 Jul 2016, In: International Journal of Cardiology. 215, p. 238-243Research output: Contribution to journal › Journal article › Research › peer-review
- Published
Long-term follow-up of trauma patients before and after implementation of a Physician-Staffed Helicopter: a prospective observational study
Funder, K. S., Rasmussen, L. S., Lohse, N., Siersma, Volkert Dirk, Hesselfeldt, R. & Steinmetz, Jacob, Jan 2016, In: Injury. 47, 1, p. 7-13 7 p.Research output: Contribution to journal › Journal article › Research › peer-review
- Published
Maternal pain influences her evaluation of recurrent pain in 6- to 11-year-old healthy children
mxb897, mxb897, Siersma, Volkert Dirk, Nielsen, Kirsten Lykke, Ertmann, Ruth Kirk, Knudsen, Lisbeth E. & Mäkelä, Marjukka, Feb 2016, In: Acta Paediatrica. 105, 2, p. 183-190 8 p.Research output: Contribution to journal › Journal article › Research › peer-review
- Published
Effects of numerical information on intention to participate in cervical screening among women offered HPV vaccination: a randomised study
Hestbech, Mie Sara, Gyrd-Hansen, D., Kragstrup, Jakob, Siersma, Volkert Dirk & Brodersen, John Brandt, 15 Nov 2016, In: Scandinavian Journal of Primary Health Care. 34, 4, p. 401-419 19 p.Research output: Contribution to journal › Journal article › Research › peer-review
- Published
How does HPV vaccination status relate to risk perceptions and intention to participate in cervical screening? a survey study
Hestbech, Mie Sara, Gyrd-Hansen, D., Kragstrup, Jakob, Siersma, Volkert Dirk & Brodersen, John Brandt, 3 Aug 2016, In: BMC Public Health. 16, p. 1-11 11 p., 708.Research output: Contribution to journal › Journal article › Research › peer-review
- Published
Moderate-to-high intensity physical exercise in patients with Alzheimer’s disease: a randomised controlled trial.
Hoffmann, K., Sobol, N. A., Frederiksen, K. S., Beyer, N. A-M., Vogel, A. M., Vestergaard, K., Brændgaard, H., Gottrup, H., Lolk, A., Wermuth, L., Jacobsen, S., Laugesen, L. P., Gergelyffy, R. G., Høgh, P., Bjerregaard, E., Andersen, B. B., Siersma, V. D., Johannsen, P., Cotman, C. W., Waldemar, G. & 1 others, , 2016, In: Journal of Alzheimer's Disease. 50, 2, p. 443-453 11 p.Research output: Contribution to journal › Journal article › Research › peer-review
- Published
Cerebrospinal Fluid Amyloid Beta and Tau Concentrations Are Not Modulated by 16 Weeks of Moderate- to High-Intensity Physical Exercise in Patients with Alzheimer Disease
Jensen, C. S., Portelius, E., Siersma, Volkert Dirk, Høgh, Peter, Wermuth, L., Blennow, K., Zetterberg, H., Waldemar, Gunhild, Hasselbalch, Steen & Simonsen, A. H., Oct 2016, In: Dementia and Geriatric Cognitive Disorders. 42, 3-4, p. 146-158 13 p.Research output: Contribution to journal › Journal article › Research › peer-review
- Published
Effect of Total Dose of Lidocaine on Duration of Adductor Canal Block, Assessed by Different Test Methods: A Report of Two Blinded, Randomized, Crossover Studies in Healthy Volunteers
Jæger, P., Koscielniak-Nielsen, Z. J., Hilsted, K. L., Grevstad, U., Siersma, Volkert Dirk, Fabritius, M. L. & Dahl, J. B., Oct 2016, In: Anesthesia and Analgesia. 123, 4, p. 1026-1032 7 p.Research output: Contribution to journal › Journal article › Research › peer-review
- 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
- Published
Intentional Weight Loss and Longevity in Overweight Patients with Type 2 Diabetes: A Population-Based Cohort Study
Køster-Rasmussen, Rasmus, Simonsen, M. K., Siersma, Volkert Dirk, Henriksen, J. E., Heitmann, Berit & Olivarius, Niels de Fine, 25 Jan 2016, In: PloS one. 11, 1, p. 1-14 14 p., e0146889.Research output: Contribution to journal › Journal article › Research › peer-review
- Published
BRAF mutations in conjunctival melanoma: investigation of incidence, clinicopathological features, prognosis and paired premalignant lesions
Larsen, A., Dahl, C., Dahmcke, C. M., Lade-Keller, J., Siersma, Volkert Dirk, Toft, Peter Bjerre, Coupland, S. E., Prause, J. U., Guldberg, P. & Heegaard, Steffen, 2016, In: Acta Ophthamologica (Online). 94, 5, p. 463-470 8 p.Research output: Contribution to journal › Journal article › Research › peer-review
- 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
- Published
Menopausal symptoms: Development and dimensionality of the MenoScores Questionnaire (MSQ)
Lund, K. S., Waldorff, Frans Boch, Siersma, Volkert Dirk & Brodersen, John Brandt, 15 Jun 2016.Research output: Contribution to conference › Conference abstract for conference › Research › peer-review
- Published
Informasjonsstyrke og utvalgsstørrelse i kvalitative studier
Malterud, Kirsti, Siersma, Volkert Dirk & Guassora, Ann Dorrit, 2016, In: Fysioterapeuten. 83, 8, p. 31 1 p.Research output: Contribution to journal › Journal article › Research
- Published
Sample size in qualitative interview studies: guided by information power
Malterud, Kirsti, Siersma, Volkert Dirk & Guassora, Ann Dorrit, Nov 2016, In: Qualitative Health Research. 26, 13, p. 1753-1760 8 p.Research output: Contribution to journal › Journal article › Research › peer-review
- Published
Micronucleus frequency in Danish school children and their mothers from the DEMOCOPHES population.
Mørck, T. A., Vande Loock, K., Poulsen, M. B., Siersma, Volkert Dirk, Nielsen, J. K. S., Hertel, O., Kirsch-Volders, M. & Knudsen, Lisbeth E., 2016, In: Mutagenesis. 31, 1, p. 1-8 8 p.Research output: Contribution to journal › Journal article › Research › peer-review
- Published
Poor self-rated health did not increase risk of permanent nursing placement or mortality in people with mild Alzheimer’s disease
Nielsen, Anni Brit Sternhagen, Siersma, Volkert Dirk, Waldemar, Gunhild & Waldorff, Frans Boch, 2016, In: B M C Geriatrics. 16, 87Research output: Contribution to journal › Journal article › Research › peer-review
- Published
Are CSF Biomarkers Useful as Prognostic Indicators in Diagnostically Unresolved Cognitively Impaired Patients in a Normal Clinical Setting
Nielsen, M. S., Simonsen, A. H., Siersma, Volkert Dirk, Hasselbalch, Steen & Høgh, Peter, Sep 2016, In: Dementia and Geriatric Cognitive Disorders. Extra. 6, 3, p. 465-476 12 p.Research output: Contribution to journal › Journal article › Research › peer-review
- 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. e191Research output: Contribution to journal › Journal article › Research › peer-review
- 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
- 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. 960-966Research output: Contribution to journal › Journal article › Research › peer-review
- 2015
- Published
Increased healing in diabetic toe ulcers in a multidisciplinary foot clinic—An observational cohort study
Almdal, Thomas Peter, Nielsen, A. A., Nielsen, K. E., Jørgensen, M. E., Rasmussen, A., Hangaard, S., Siersma, Volkert Dirk & Holstein, P., 2015, In: Diabetes Research and Clinical Practice. 110, 3, p. 315-321 7 p.Research output: Contribution to journal › Journal article › Research › peer-review
- Published
Association of the blood eosinophil count with hematological malignancies and mortality
Andersen, Christen Bertel L, Siersma, Volkert Dirk, Hasselbalch, Hans Carl, Vestergaard, H., Mesa, R., Felding, P., Olivarius, Niels de Fine & Bjerrum, O. W., Mar 2015, In: American Journal of Hematology. 90, 3, p. 225-229 5 p.Research output: Contribution to journal › Journal article › Research › peer-review
- Published
Is thrombocytosis a valid indicator of advanced stage and high mortality of gynecological cancer?
Andersen, Christen Bertel L, Eskelund, C. W., Siersma, Volkert Dirk, Felding, P., Lind, B., Palmblad, J., Bjerrum, O. W., Friis, S., Hasselbalch, H. C. & Olivarius, Niels de Fine, Nov 2015, In: Gynecologic Oncology. 139, 2, p. 312-318 7 p.Research output: Contribution to journal › Journal article › Research › peer-review
- 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
- 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
- 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
- Published
Urinary markers of nucleic acid oxidation and cancer in type 2 diabetes
Broedbaek, K., Siersma, Volkert Dirk, Henriksen, T. F., Weimann, A., Petersen, M., Andersen, J. T., Solem, E. V. J., Hansen, Lars J, Henriksen, J. E., Bonnema, S. J., Olivarius, Niels de Fine, Friis, S. & Poulsen, Henrik Enghusen, Apr 2015, In: Redox Biology. 4, p. 34-39 6 p.Research output: Contribution to journal › Journal article › Research › peer-review
- Published
Prescribing style and variation in antibiotic prescriptions for sore throat: cross-sectional study across six countries
Cordoba Currea, Gloria Cristina, Siersma, Volkert Dirk, Lopez-Valcarcel, B. G., Bjerrum, Lars, Llor, C., Aabenhus, Rune Munck & Mäkelä, Marjukka, 29 Jan 2015, In: B M C Family Practice. 16, p. 1-8 8 p., 7.Research output: Contribution to journal › Journal article › Research › peer-review
- Published
Psychosocial consequences in the Danish randomised controlled lung cancer screening trial (DLCST)
F. Rasmussen, J., Siersma, Volkert Dirk, H. Pedersen, J. & Brodersen, John Brandt, Jan 2015, In: Lung Cancer. 87, 1, p. 65-72 8 p.Research output: Contribution to journal › Journal article › Research › peer-review
- Published
An intervention with access to C-reactive protein rapid test reduces antibiotic overprescribing in acute exacerbations of chronic bronchitis and COPD
F. Strykowski, D., Nielsen, Anni Brit Sternhagen, Llor, C., Siersma, Volkert Dirk & Bjerrum, Lars, 2015, In: Family Practice. 32, 4, p. 395-400 6 p.Research output: Contribution to journal › Journal article › Research › peer-review
- Published
Increased health care utilisation in international adoptees
Graff, H. J., Siersma, Volkert Dirk, Kragstrup, Jakob & Petersson, B., Aug 2015, In: Danish Medical Journal. 62, 8, p. 1-6 6 p., A5111.Research output: Contribution to journal › Journal article › Research › peer-review
- Published
Author Reply to Dr. Arleo and to Dr Newell
Heleno, B. M., Siersma, Volkert Dirk & Brodersen, John Brandt, 2015, In: Annals of Family Medicine.Research output: Contribution to journal › Comment/debate › Research
- Published
Diagnostic Invasiveness and Psychosocial Consequences of False-Positive Mammography
Heleno, B. M., Siersma, Volkert Dirk & Brodersen, John Brandt, May 2015, In: Annals of Family Medicine. 13, 3, p. 242-249 8 p.Research output: Contribution to journal › Journal article › Research › peer-review
- Published
Waiting time and the psychosocial consequences of false-positive mammography: cohort study.
Heleno, B. M., Siersma, Volkert Dirk & Brodersen, John Brandt, 30 Apr 2015, In: Journal of Negative Results in BioMedicine. 14, 8, p. 1-4 4 p.Research output: Contribution to journal › Journal article › Research › peer-review
- 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
- Published
Point of care susceptibility testing in primary care: does it lead to a more appropriate prescription of antibiotics in patients with uncomplicated urinary tract infections? Protocol for a randomized controlled trial
Holm, Anne, Cordoba Currea, Gloria Cristina, Sørensen, Tina Møller, Jessen, Lisbeth Rem, Siersma, Volkert Dirk & Bjerrum, Lars, 2015, In: B M C Family Practice. 16, 8 p., 106.Research output: Contribution to journal › Journal article › Research › peer-review
- 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
ID: 3512987
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Maternal stress and placental function, a study using questionnaires and biomarkers at birth
Research output: Contribution to journal › Journal article › Research › peer-review
Published -
329
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Clinical indications for antibiotic use in Danish general practice: results from a nationwide electronic prescription database
Research output: Contribution to journal › Journal article › Research › peer-review
Published -
326
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Biomonitoring of Danish school children and mothers including biomarkers of PBDE and glyphosate
Research output: Contribution to journal › Journal article › Research › peer-review
Published