Hendrik Koffijberg

Summary

Affiliation: University Medical Center Utrecht
Country: The Netherlands

Publications

  1. pmc Robot-assisted minimally invasive thoraco-laparoscopic esophagectomy versus open transthoracic esophagectomy for resectable esophageal cancer, a randomized controlled trial (ROBOT trial)
    Pieter C Van der Sluis
    Department of Surgery, G04, 228, University Medical Center Utrecht, Heidelberglaan 100, Utrecht, CX, 3584, The Netherlands
    Trials 13:230. 2012
  2. pmc From accuracy to patient outcome and cost-effectiveness evaluations of diagnostic tests and biomarkers: an exemplary modelling study
    Hendrik Koffijberg
    Julius Centre for Health Sciences and Primary Care, University Medical Centre Utrecht, Mailstop STR 6 131, P O Box 85500, 3508, Utrecht, GA, The Netherlands
    BMC Med Res Methodol 13:12. 2013
  3. doi request reprint Communicating uncertainty in economic evaluations: verifying optimal strategies
    H Koffijberg
    Julius Center for Health Sciences and Primary Care, University Medical Center Utrecht, Utrecht, The Netherlands
    Med Decis Making 32:477-87. 2012
  4. ncbi request reprint Subarachnoid haemorrhage in Sweden 1987-2002: regional incidence and case fatality rates
    H Koffijberg
    University Medical Centre Utrecht, Julius Centre for Health Sciences and Primary Care, STR 6 131 7 113, P O Box 85500, 3508 GA Utrecht, The Netherlands
    J Neurol Neurosurg Psychiatry 79:294-9. 2008
  5. doi request reprint Aneurysm occlusion in elderly patients with aneurysmal subarachnoid haemorrhage: a cost-utility analysis
    H Koffijberg
    Julius Center for Health Sciences and Primary Care, University Medical Center Utrecht, Str 6 131, PO Box 85500, Utrecht 3508 GA, The Netherlands
    J Neurol Neurosurg Psychiatry 82:718-27. 2011
  6. doi request reprint Do intraindividual variation in disease progression and the ensuing tight window of opportunity affect estimation of screening benefits?
    Hendrik Koffijberg
    Julius Center for Health Sciences and Primary Care, University Medical Center Utrecht, Utrecht, The Netherlands
    Med Decis Making 29:82-90. 2009
  7. doi request reprint Growth rates of intracranial aneurysms: exploring constancy
    Hendrik Koffijberg
    Julius Center for Health Sciences and Primary Care, University Medical Center Utrecht, The Netherlands
    J Neurosurg 109:176-85. 2008
  8. doi request reprint Excess mortality and cardiovascular events in patients surviving subarachnoid hemorrhage: a nationwide study in Sweden
    Dennis J Nieuwkamp
    Department of Neurology, C03 236, University Medical Center Utrecht, PO Box 85500, 3584 CX Utrecht, The Netherlands
    Stroke 42:902-7. 2011
  9. ncbi request reprint Optimal screening strategy for familial intracranial aneurysms: a cost-effectiveness analysis
    A Stijntje E Bor
    Department of Neurology, Rudolf Magnus Institute of Neuroscience, University Medical Centre Utrecht, GA Utrecht, The Netherlands
    Neurology 74:1671-9. 2010
  10. doi request reprint Cost-effectiveness of aspirin treatment in the primary prevention of cardiovascular disease events in subgroups based on age, gender, and varying cardiovascular risk
    Jacoba P Greving
    Julius Center for Health Sciences and Primary Care, Department of Neurology and Neurosurgery, University Medical Center Utrecht, Utrecht, Netherlands
    Circulation 117:2875-83. 2008

Collaborators

Detail Information

Publications26

  1. pmc Robot-assisted minimally invasive thoraco-laparoscopic esophagectomy versus open transthoracic esophagectomy for resectable esophageal cancer, a randomized controlled trial (ROBOT trial)
    Pieter C Van der Sluis
    Department of Surgery, G04, 228, University Medical Center Utrecht, Heidelberglaan 100, Utrecht, CX, 3584, The Netherlands
    Trials 13:230. 2012
    ..The objective is to evaluate the efficacy, risks, quality of life and cost-effectiveness of RATE as an alternative to open transthoracic esophagectomy for treatment of esophageal cancer...
  2. pmc From accuracy to patient outcome and cost-effectiveness evaluations of diagnostic tests and biomarkers: an exemplary modelling study
    Hendrik Koffijberg
    Julius Centre for Health Sciences and Primary Care, University Medical Centre Utrecht, Mailstop STR 6 131, P O Box 85500, 3508, Utrecht, GA, The Netherlands
    BMC Med Res Methodol 13:12. 2013
    ..We demonstrate this by assessing the cost-effectiveness of modified transesophageal echocardiography (TEE) compared with manual palpation for the detection of atherosclerosis in the ascending aorta...
  3. doi request reprint Communicating uncertainty in economic evaluations: verifying optimal strategies
    H Koffijberg
    Julius Center for Health Sciences and Primary Care, University Medical Center Utrecht, Utrecht, The Netherlands
    Med Decis Making 32:477-87. 2012
    ..The authors developed an extension of SLT that addresses these shortcomings...
  4. ncbi request reprint Subarachnoid haemorrhage in Sweden 1987-2002: regional incidence and case fatality rates
    H Koffijberg
    University Medical Centre Utrecht, Julius Centre for Health Sciences and Primary Care, STR 6 131 7 113, P O Box 85500, 3508 GA Utrecht, The Netherlands
    J Neurol Neurosurg Psychiatry 79:294-9. 2008
    ..Reliable estimates of age-specific case fatality rates are lacking. We analysed regional incidence rates and case fatality rates of SAH in Sweden...
  5. doi request reprint Aneurysm occlusion in elderly patients with aneurysmal subarachnoid haemorrhage: a cost-utility analysis
    H Koffijberg
    Julius Center for Health Sciences and Primary Care, University Medical Center Utrecht, Str 6 131, PO Box 85500, Utrecht 3508 GA, The Netherlands
    J Neurol Neurosurg Psychiatry 82:718-27. 2011
    ..With increasing age, overall prognosis decreases, and the complications of aneurysm occlusion increase. The balance of risks for aneurysm occlusion in elderly SAH patients in different age categories and clinical conditions is unknown...
  6. doi request reprint Do intraindividual variation in disease progression and the ensuing tight window of opportunity affect estimation of screening benefits?
    Hendrik Koffijberg
    Julius Center for Health Sciences and Primary Care, University Medical Center Utrecht, Utrecht, The Netherlands
    Med Decis Making 29:82-90. 2009
    ..The authors study the effects of intraindividual variation and the combined effects of inter- and intraindividual variation in disease progression on the effectiveness of screening...
  7. doi request reprint Growth rates of intracranial aneurysms: exploring constancy
    Hendrik Koffijberg
    Julius Center for Health Sciences and Primary Care, University Medical Center Utrecht, The Netherlands
    J Neurosurg 109:176-85. 2008
    ..Recent case reports have suggested that aneurysms grow fast in a short period of time. The authors of the present report investigated the plausibility of a constant growth rate for intracranial aneurysms...
  8. doi request reprint Excess mortality and cardiovascular events in patients surviving subarachnoid hemorrhage: a nationwide study in Sweden
    Dennis J Nieuwkamp
    Department of Neurology, C03 236, University Medical Center Utrecht, PO Box 85500, 3584 CX Utrecht, The Netherlands
    Stroke 42:902-7. 2011
    ..We compared incidences of vascular diseases, vascular death, and all-cause death after SAH with those in the general population...
  9. ncbi request reprint Optimal screening strategy for familial intracranial aneurysms: a cost-effectiveness analysis
    A Stijntje E Bor
    Department of Neurology, Rudolf Magnus Institute of Neuroscience, University Medical Centre Utrecht, GA Utrecht, The Netherlands
    Neurology 74:1671-9. 2010
    ..Screening such individuals for intracranial aneurysms is advocated, but its effectiveness and cost-effectiveness are unknown, as are the optimal age ranges and interval for screening...
  10. doi request reprint Cost-effectiveness of aspirin treatment in the primary prevention of cardiovascular disease events in subgroups based on age, gender, and varying cardiovascular risk
    Jacoba P Greving
    Julius Center for Health Sciences and Primary Care, Department of Neurology and Neurosurgery, University Medical Center Utrecht, Utrecht, Netherlands
    Circulation 117:2875-83. 2008
    ..We assessed the cost-effectiveness of aspirin separately for men and women of different ages with various levels of cardiovascular disease risk...
  11. doi request reprint Common carotid intima-media thickness measurements in cardiovascular risk prediction: a meta-analysis
    Hester M den Ruijter
    Julius Center for Health Sciences and Primary Care, Heidelberglaan 100, 3584 CX, Utrecht, The Netherlands
    JAMA 308:796-803. 2012
    ..The evidence that measurement of the common carotid intima-media thickness (CIMT) improves the risk scores in prediction of the absolute risk of cardiovascular events is inconsistent...
  12. pmc Individual participant data meta-analysis for a binary outcome: one-stage or two-stage?
    Thomas P A Debray
    Julius Center for Health Sciences and Primary Care, University Medical Center Utrecht, Utrecht, The Netherlands
    PLoS ONE 8:e60650. 2013
    ..These are generally thought to produce similar results, but empirical comparisons are few...
  13. ncbi request reprint Cost-effectiveness of magnetic resonance angiography versus intra-arterial digital subtraction angiography to follow-up patients with coiled intracranial aneurysms
    Joanna D Schaafsma
    Department of Neurology, Rudolf Magnus Institute of Neuroscience, University Medical Center, Utrecht, The Netherlands
    Stroke 41:1736-42. 2010
    ..We evaluated the cost-effectiveness of follow-up with MRA vs IA-DSA to assess whether in this setting MRA may replace IA-DSA...
  14. doi request reprint A framework for developing, implementing, and evaluating clinical prediction models in an individual participant data meta-analysis
    Thomas P A Debray
    Julius Center for Health Sciences and Primary Care, University Medical Center Utrecht, Utrecht, The Netherlands
    Stat Med 32:3158-80. 2013
    ....
  15. doi request reprint Effectiveness and costs of screening for aneurysms every 5 years after subarachnoid hemorrhage
    Marieke J H Wermer
    Department of Neurology G03 228, University Medical Center Utrecht, Heidelberglaan 100, 3500 GA Utrecht, The Netherlands
    Neurology 70:2053-62. 2008
    ..Patients who survive after subarachnoid hemorrhage (SAH) are at risk for a recurrence despite successful treatment of the ruptured aneurysm and may therefore benefit from screening for new aneurysms...
  16. ncbi request reprint Meta-analysis and aggregation of multiple published prediction models
    Thomas P A Debray
    Julius Center for Health Sciences and Primary Care, University Medical Center Utrecht, Utrecht, The Netherlands
    Stat Med 33:2341-62. 2014
    ..The aggregation methods do not require existing models to have similar predictors and can be applied when relatively few data are at hand...
  17. pmc Incorporating published univariable associations in diagnostic and prognostic modeling
    Thomas P A Debray
    Julius Center for Health Sciences and Primary Care, University Medical Center Utrecht, Utrecht, The Netherlands
    BMC Med Res Methodol 12:121. 2012
    ..Currently, methods to incorporate such information in the construction of a prediction model are underdeveloped and unfamiliar to many researchers...
  18. doi request reprint Long-term health benefits and costs of measurement of carotid intima-media thickness in prevention of coronary heart disease
    Hester M den Ruijter
    Julius Center for Health Sciences and Primary Care, University Medical Center Utrecht, Utrecht, The Netherlands
    J Hypertens 31:782-90. 2013
    ..Our objective was to assess the currently unknown cost-effectiveness of CIMT measurements in primary prevention...
  19. doi request reprint Enhancing value of information analyses
    Mart P Janssen
    Julius Center for Health Sciences and Primary Care, University Medical Center Utrecht, Utrecht, The Netherlands
    Value Health 12:935-41. 2009
    ..The aim of this study was to demonstrate that it is feasible and recommendable to present value of information (VOI) outcomes in terms of underlying costs and effects in addition to costs alone...
  20. ncbi request reprint Assessing performance of a randomized versus a non-randomized study design
    Maartje Raaijmakers
    Department of Child and Adolescent Psychiatry, Rudolf Magnus Institute for Neuroscience, University Medical Centre Utrecht, The Netherlands
    Contemp Clin Trials 29:293-303. 2008
    ..The quality of this match was then compared with the quality which is to be expected from a randomized study...
  21. doi request reprint Aggregating published prediction models with individual participant data: a comparison of different approaches
    Thomas P A Debray
    Julius Center for Health Sciences and Primary Care, University Medical Center Utrecht, Utrecht, The Netherlands
    Stat Med 31:2697-712. 2012
    ..Assessing the degree of heterogeneity between IPD and literature findings remains crucial to determine the optimal approach in aggregating previous evidence into new prediction models...
  22. doi request reprint Multiple imputation of missing repeated outcome measurements did not add to linear mixed-effects models
    Sanne A E Peters
    Julius Center for Health Sciences and Primary Care, Stratenum 6 131, University Medical Center Utrecht, Heidelberglaan 100, 3584 CX, Utrecht, The Netherlands
    J Clin Epidemiol 65:686-95. 2012
    ..To assess the added value of multiple imputation (MI) of missing repeated outcomes measures in longitudinal data sets analyzed with linear mixed-effects (LME) models...
  23. pmc Prospective validation of a prognostic model for respiratory syncytial virus bronchiolitis in late preterm infants: a multicenter birth cohort study
    Maarten O Blanken
    Department Pediatric Immunology and Infectious Diseases, University Medical Center, Utrecht, Utrecht, The Netherlands
    PLoS ONE 8:e59161. 2013
    ..This study aimed to update and validate a prediction rule for respiratory syncytial virus (RSV) hospitalization in preterm infants 33-35 weeks gestational age (WGA)...
  24. doi request reprint Lung cancer risk at low cumulative asbestos exposure: meta-regression of the exposure-response relationship
    Sjoukje van der Bij
    Julius Center for Health Sciences and Primary Care, University Medical Center Utrecht, Heidelberglaan 100, Utrecht, The Netherlands
    Cancer Causes Control 24:1-12. 2013
    ..To assess the risk at low cumulative asbestos exposure, we provide new evidence by fitting flexible meta-regression models, a notably new and more robust method...
  25. doi request reprint Development and validation of clinical prediction models: marginal differences between logistic regression, penalized maximum likelihood estimation, and genetic programming
    Kristel J M Janssen
    Julius Center for Health Sciences and Primary Care, University Medical Center Utrecht, Utrecht, The Netherlands
    J Clin Epidemiol 65:404-12. 2012
    ..However, there are several alternative methods to develop prediction models. We compared the accuracy of a model that predicts the presence of deep venous thrombosis (DVT) when developed by four different methods...
  26. pmc The impact of the HEART risk score in the early assessment of patients with acute chest pain: design of a stepped wedge, cluster randomised trial
    Judith M Poldervaart
    Julius Center for Health Sciences and Primary Care, University Medical Center, Stratenum 6, 131, PO Box 85500, 3508AB, Utrecht, The Netherlands
    BMC Cardiovasc Disord 13:77. 2013
    ..We set out to quantify the impact of the use of the HEART score in daily practice on patient outcomes and costs...