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
- 2013
- Published
Does a history of physical exposures at work affect hand-grip strength in midlife? A retrospective cohort study in Denmark
Møller, Anne, Reventlow, Susanne, Hansen, Åse Marie, Andersen, L. L., Siersma, Volkert Dirk, Lund, Rikke, Avlund, K., Andersen, J. H. & Mortensen, O. S., 10 May 2013, In: Scandinavian Journal of Work, Environment & Health. 39, 6, p. 599-608Research output: Contribution to journal › Journal article › Research › peer-review
- Published
Reply to DeFrank and Brewer
Brodersen, John Brandt & Siersma, Volkert Dirk, 2 Sep 2013Research output: Other contribution › Net publication - Internet publication › Research
- Published
Reply to Consedine
Brodersen, John Brandt & Siersma, Volkert Dirk, 13 Sep 2013Research output: Other contribution › Net publication - Internet publication › Research
- 2014
- Published
Eosinophilia in routine blood samples as a biomarker for solid tumor development: A study based on The Copenhagen Primary Care Differential Count (CopDiff) Database
Andersen, Christen Bertel L, Siersma, Volkert Dirk, Hasselbalch, H. C., Lindegaard, H., Vestergaard, H., Felding, P., Olivarius, Niels de Fine & Bjerrum, O. W., 2014, In: Acta Oncologica. 53, 9, p. 1245-1250 6 p.Research output: Contribution to journal › Journal article › Research › peer-review
- Published
MicroRNA expression analysis and Multiplex ligation-dependent probe amplification in metastatic and non-metastatic uveal melanoma
Larsen, A., Holst, L. M., Kaczkowski, B., Andersen, M. T., Manfé, V., Siersma, Volkert Dirk, Kolko, Miriam, Kiilgaard, Jens Folke, Winther, Ole, Prause, J. U., Gniadecki, R. & Heegaard, Steffen, 2014, In: Acta Ophthalmologica. 92, 6, p. 541-549Research output: Contribution to journal › Journal article › Research › peer-review
- Published
Mobility decline in old age: the combined effect of mobility-related fatigue and socioeconomic position
Nilsson, Charlotte Juul, Siersma, Volkert Dirk, Mänty, M. R., Avlund, K., Vass, Mikkel & Lund, Rikke, 2014, In: Journal of Epidemiology & Community Health. 68, p. 510-515 6 p.Research output: Contribution to journal › Journal article › Research › peer-review
- Published
Risk of Lymphoma and Solid Cancer among Patients with Rheumatoid Arthritis in a Primary Care Setting
Andersen, Christen Bertel L, Lindegaard, H. M., Vestergaard, H., Siersma, Volkert Dirk, Hasselbalch, H. C., Olivarius, Niels de Fine, Bjerrum, O. W. & Junker, P., 2014, In: PLOS ONE. 9, 6, p. 1-7 7 p., e99388.Research output: Contribution to journal › Journal article › Research › peer-review
- Published
Risk of new or recurrent cancer after a high perioperative inspiratory oxygen fraction during abdominal surgery
Meyhoff, C. S., Jørgensen, Lars Nannestad, Wetterslev, J., Siersma, Volkert Dirk & Rasmussen, L. S., 2014, In: British Journal of Anaesthesia. 113, suppl. 1, p. i74-i81 8 p.Research output: Contribution to journal › Journal article › Research › peer-review
- 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
- 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
- Published
Association of Maternal Self-Medication and Over-the-Counter Analgesics for Children
Jensen, J. F., Gottschau, M., Siersma, Volkert Dirk, mxb897, mxb897, Holstein, B. E. & Knudsen, Lisbeth E., 1 Feb 2014, In: Pediatrics. 133, 2, p. e291-8 8 p.Research output: Contribution to journal › Journal article › Research › peer-review
- 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
- 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
- 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
- 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
- Published
PCB Concentrations and Dioxin-like Activity in Blood Samples from Danish School Children and Their Mothers living in Urban and Rural Areas
Mørck, T. A., Erdmann, S. E., Long, M., Mathiesen, Line, Nielsen, F., Siersma, Volkert Dirk, Bonefeld-Jørgensen, E. C. & Knudsen, Lisbeth E., Jul 2014, In: Basic & Clinical Pharmacology & Toxicology. 115, 1, p. 134-44 11 p.Research output: Contribution to journal › Journal article › Research › peer-review
- Published
Motivation, effort and life circumstances as predictors of foot ulcers and amputations in people with Type 2 diabetes mellitus
Bruun, C., Guassora, Ann Dorrit, Nielsen, Anni Brit Sternhagen, Siersma, Volkert Dirk, Holstein, P. E. & Olivarius, Niels de Fine, 14 Jul 2014, In: Diabetic Medicine. 31, 11, p. 1468-76 9 p.Research output: Contribution to journal › Journal article › Research › peer-review
- 2015
- 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
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
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
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
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
Optimal volume of local anaesthetic for the adductor canal block: Using the continual reassessment method to estimate the ED95
Jæger, P., Jenstrup, M. T., Lund, J., Siersma, Volkert Dirk, Brøndum, V., Hilsted, K. L. & Dahl, J. B., 2015, In: British Journal of Anaesthesia. 115, 6, p. 920-926 7 p.Research output: Contribution to journal › Journal article › Research › peer-review
- Published
PFAS concentrations in plasma samples from Danish school children and their mothers
Mørck, T. A., Nielsen, F., Nielsen, J. K. S., Siersma, Volkert Dirk, Grandjean, P. & Knudsen, Lisbeth E., 2015, In: Chemosphere. 129, p. 203-209 7 p.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
- 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
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
Good quality of oral anticoagulation treatment in general practice using international normalised ratio point of care testing.
Løkkegaard, T., Pedersen, T. H., Lind, B., Siersma, Volkert Dirk & Waldorff, Frans Boch, Feb 2015, In: Danish Medical Journal. 62, 2, p. 1-6 6 p., A5010.Research output: Contribution to journal › Journal article › Research › peer-review
- 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
- 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
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
- 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
Weight Changes following the Diagnosis of Type 2 Diabetes: The Impact of Recent and Past Weight History before Diagnosis. Results from the Danish Diabetes Care in General Practice (DCGP) Study
Olivarius, Niels de Fine, Siersma, Volkert Dirk, Køster-Rasmussen, Rasmus, Heitmann, Berit & Waldorff, Frans Boch, 15 Apr 2015, In: P L o S One. 10, 4, p. 1-14 14 p., e0122219.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
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
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
- Published
Adequate measurement of menopausal symptoms
Lund, K. S., Waldorff, Frans Boch, Siersma, Volkert Dirk & Brodersen, John Brandt, 16 Jun 2015.Research output: Contribution to conference › Conference abstract for conference › 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
Missing portion sizes in FFQ: alternatives to use of standard portions
Køster-Rasmussen, Rasmus, Siersma, Volkert Dirk, Halldorson, T. I., Olivarius, Niels de Fine, Henriksen, J. E. & Heitmann, Berit, Aug 2015, In: Public Health Nutrition. 18, 11, p. 1914-1921 8 p.Research output: Contribution to journal › Journal article › Research › peer-review
- 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, , Aug 2015, In: Environmental Research. 141, p. 96-105 10 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
A Retrospective Review of Conjunctival Melanoma Presentation, Treatment, and Outcome and an Investigation of Features Associated With BRAF Mutations
Larsen, A., Dahmcke, C. M., Dahl, C., Siersma, Volkert Dirk, Toft, Peter Bjerre, Coupland, S. E., Prause, J. U., Guldberg, P. & Heegaard, Steffen, Nov 2015, In: J A M A Ophthalmology. 133, 11, p. 1295-1303 9 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
Does physical exposure throughout working life influence chair-rise performance in midlife? A retrospective cohort study of associations between work and physical function in Denmark
Møller, Anne, Reventlow, Susanne, Hansen, Åse Marie, Andersen, L. L., Siersma, Volkert Dirk, Lund, Rikke, Avlund, K., Andersen, J. H. & Mortensen, Ole Steen, 4 Nov 2015, In: B M J Open. 5, 11, p. 1-9 9 p., e009873.Research output: Contribution to journal › Journal article › Research › peer-review
- Published
Back on track: smoking cessation and weight changes over nine years in a community-based cohort study
Køster-Rasmussen, Rasmus, Permin, C. A., Siersma, Volkert Dirk, Henriksen, J. E., Heitmann, Berit, Heldgaard, P. E. & Olivarius, Niels de Fine, Dec 2015, In: Preventive Medicine. 81, p. 320-325 6 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
- 2016
- 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
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
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
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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
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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