Maarten Boers

Summary

Affiliation: University Hospital Vrije Universiteit
Country: The Netherlands

Publications

  1. ncbi request reprint [Roaming through methodology. XXV. Outcome measures, surrogate outcomes, and intermediate measures]
    M Boers
    Academisch Ziekenhuis Vrije Universiteit, Afd Klinische Epidemiologie en Biostatistiek, Amsterdam
    Ned Tijdschr Geneeskd 144:1949-52. 2000
  2. ncbi request reprint Deriving an operational definition of low disease activity state in rheumatoid arthritis
    Maarten Boers
    VU University Medical Centre, Amsterdam, The Netherlands
    J Rheumatol 30:1112-4. 2003
  3. doi request reprint Helicobacter pylori eradication in patients on long-term treatment with NSAIDs reduces the severity of gastritis: a randomized controlled trial
    Helena T J I de Leest
    Department of Rheumatology, VU University Medical Center, Amsterdam, The Netherlands
    J Clin Gastroenterol 43:140-6. 2009
  4. doi request reprint A new graph and scoring system simplified analysis of changing states: disease remissions in a rheumatoid arthritis clinical trial
    Maarten Boers
    Department of Epidemiology and Biostatistics, VU University Medical Center, Amsterdam, The Netherlands
    J Clin Epidemiol 63:633-7. 2010
  5. doi request reprint Remission in early rheumatoid arthritis defined by 28 joint counts: limited consequences of residual disease activity in the forefeet on outcome
    Lilian H D van Tuyl
    VU University Medical Centre, Department of Rheumatology, ZH 3A 56, De Boelelaan 1117, 1081 HV Amsterdam, The Netherlands
    Ann Rheum Dis 71:33-7. 2012
  6. doi request reprint Baseline RANKL:OPG ratio and markers of bone and cartilage degradation predict annual radiological progression over 11 years in rheumatoid arthritis
    Lilian H D van Tuyl
    VU University Medical Center, Department of Rheumatology, De Boelelaan 1117, Amsterdam, The Netherlands
    Ann Rheum Dis 69:1623-8. 2010
  7. doi request reprint Relapse-remission and remission-relapse switches in rheumatoid arthritis patients were modeled by random effects
    Johannes Berkhof
    Department of Clinical Epidemiology and Biostatistics, VU University Medical Centre, Amsterdam, The Netherlands
    J Clin Epidemiol 62:1085-94. 2009
  8. ncbi request reprint [Rheumatoid arthritis: an equally strong risk factor for cardiovascular disease as diabetes mellitus]
    Mike J L Peters
    Vrije Universiteit Medisch Centrum, afd Reumatologie, Amsterdam, The Netherlands
    Ned Tijdschr Geneeskd 154:A1469. 2010
  9. pmc Aggressive therapy in patients with early arthritis results in similar outcome compared with conventional care: the STREAM randomized trial
    Izhar C van Eijk
    Jan van Breemen Research Institute Reade, Dr Jan van Breemenstraat 2, 1056 AB, Amsterdam, The Netherlands
    Rheumatology (Oxford) 51:686-94. 2012
  10. pmc Evidence for predictive validity of remission on long-term outcome in rheumatoid arthritis: a systematic review
    Lilian H D van Tuyl
    Department of Rheumatology, VU University Medical Center, Amsterdam, The Netherlands
    Arthritis Care Res (Hoboken) 62:108-17. 2010

Detail Information

Publications81

  1. ncbi request reprint [Roaming through methodology. XXV. Outcome measures, surrogate outcomes, and intermediate measures]
    M Boers
    Academisch Ziekenhuis Vrije Universiteit, Afd Klinische Epidemiologie en Biostatistiek, Amsterdam
    Ned Tijdschr Geneeskd 144:1949-52. 2000
    ..the applicability of a measure can be simply appraised by answering 3 questions: 'Is the measure truthful (relevant, unbiased)?'; 'Does it discriminate between situations that are of interest?'; 'Is the measure feasible in my setting?'..
  2. ncbi request reprint Deriving an operational definition of low disease activity state in rheumatoid arthritis
    Maarten Boers
    VU University Medical Centre, Amsterdam, The Netherlands
    J Rheumatol 30:1112-4. 2003
    ..Once a few candidate definitions have been selected, their usefulness and prognostic validity can be tested in longitudinal datasets...
  3. doi request reprint Helicobacter pylori eradication in patients on long-term treatment with NSAIDs reduces the severity of gastritis: a randomized controlled trial
    Helena T J I de Leest
    Department of Rheumatology, VU University Medical Center, Amsterdam, The Netherlands
    J Clin Gastroenterol 43:140-6. 2009
    ....
  4. doi request reprint A new graph and scoring system simplified analysis of changing states: disease remissions in a rheumatoid arthritis clinical trial
    Maarten Boers
    Department of Epidemiology and Biostatistics, VU University Medical Center, Amsterdam, The Netherlands
    J Clin Epidemiol 63:633-7. 2010
    ..However, this approach is complex and not intuitive to clinicians. In this paper we propose a simple scoring system and a graph that can enhance the information about the remission experience in a trial or cohort study...
  5. doi request reprint Remission in early rheumatoid arthritis defined by 28 joint counts: limited consequences of residual disease activity in the forefeet on outcome
    Lilian H D van Tuyl
    VU University Medical Centre, Department of Rheumatology, ZH 3A 56, De Boelelaan 1117, 1081 HV Amsterdam, The Netherlands
    Ann Rheum Dis 71:33-7. 2012
    ..A study was undertaken to study the consequences of remission misclassification due to residual disease activity in the feet on physical function and joint damage in the subsequent year in an observational early disease cohort...
  6. doi request reprint Baseline RANKL:OPG ratio and markers of bone and cartilage degradation predict annual radiological progression over 11 years in rheumatoid arthritis
    Lilian H D van Tuyl
    VU University Medical Center, Department of Rheumatology, De Boelelaan 1117, Amsterdam, The Netherlands
    Ann Rheum Dis 69:1623-8. 2010
    ....
  7. doi request reprint Relapse-remission and remission-relapse switches in rheumatoid arthritis patients were modeled by random effects
    Johannes Berkhof
    Department of Clinical Epidemiology and Biostatistics, VU University Medical Centre, Amsterdam, The Netherlands
    J Clin Epidemiol 62:1085-94. 2009
    ..To compare statistical models for the analysis of two-state disease processes...
  8. ncbi request reprint [Rheumatoid arthritis: an equally strong risk factor for cardiovascular disease as diabetes mellitus]
    Mike J L Peters
    Vrije Universiteit Medisch Centrum, afd Reumatologie, Amsterdam, The Netherlands
    Ned Tijdschr Geneeskd 154:A1469. 2010
    ..16 (95% CI: 1.28-3.63) and 2.04 (95% CI: 1.12-3.67) respectively. CONCLUSION: RA is associated with an increased risk of CVD and this risk is similar to that associated with DM2...
  9. pmc Aggressive therapy in patients with early arthritis results in similar outcome compared with conventional care: the STREAM randomized trial
    Izhar C van Eijk
    Jan van Breemen Research Institute Reade, Dr Jan van Breemenstraat 2, 1056 AB, Amsterdam, The Netherlands
    Rheumatology (Oxford) 51:686-94. 2012
    ..To compare the effects of aggressive tight control therapy and conventional care on radiographic progression and disease activity in patients with early mild inflammatory arthritis...
  10. pmc Evidence for predictive validity of remission on long-term outcome in rheumatoid arthritis: a systematic review
    Lilian H D van Tuyl
    Department of Rheumatology, VU University Medical Center, Amsterdam, The Netherlands
    Arthritis Care Res (Hoboken) 62:108-17. 2010
    ..As part of an undertaking to redefine remission, the current review describes the relationship between remission and long-term structural outcome...
  11. doi request reprint Does rheumatoid arthritis equal diabetes mellitus as an independent risk factor for cardiovascular disease? A prospective study
    Mike J L Peters
    VU Medical Center, Amsterdam, The Netherlands
    Arthritis Rheum 61:1571-9. 2009
    ..We prospectively assessed the incidence of CVD in patients with RA compared with patients with type 2 diabetes mellitus (DM) and the general population...
  12. ncbi request reprint Indirect and total costs of early rheumatoid arthritis: a randomized comparison of combined step-down prednisolone, methotrexate, and sulfasalazine with sulfasalazine alone
    Ingeborg Korthals-de Bos
    Institute for Research in Extramural Medicine, VU University Medical Center, Amsterdam, The Netherlands
    J Rheumatol 31:1709-16. 2004
    ..Analyses of the efficacy and direct costs of the treatments have already been reported...
  13. pmc A non-inferiority trial of an attenuated combination strategy ('COBRA-light') compared to the original COBRA strategy: clinical results after 26 weeks
    Debby den Uyl
    Department of Rheumatology, VU University Medical Center, Amsterdam, The Netherlands
    Ann Rheum Dis 73:1071-8. 2014
    ..Attenuating the COBRA regimen might lessen concerns about side effects, but the efficacy of such strategies is unknown...
  14. ncbi request reprint Chronological reading of radiographs in rheumatoid arthritis increases efficiency and does not lead to bias
    Lilian H D van Tuyl
    Department of Rheumatology, VU University Medical Center, Amsterdam, The Netherlands
    Ann Rheum Dis 73:391-5. 2014
    ..To evaluate the difference between chronological and random sequence reading in a series of radiographs with 11 years' follow-up. In addition, the influence of the starting point and length of series was evaluated...
  15. pmc The interferon type I signature towards prediction of non-response to rituximab in rheumatoid arthritis patients
    Hennie G Raterman
    Department of Rheumatology, VU University Medical Center, De Boelelaan 1117, Amsterdam, 1081HV, The Netherlands
    Arthritis Res Ther 14:R95. 2012
    ..However, approximately 40% to 50% of rituximab (RTX) treated RA patients have a poor response. We investigated whether baseline gene expression levels can discriminate between clinical non-responders and responders to RTX...
  16. doi request reprint Comparison of long-term clinical outcome with etanercept treatment and adalimumab treatment of rheumatoid arthritis with respect to immunogenicity
    Charlotte L Krieckaert
    Jan van Breemen Research Institute Reade, Amsterdam, The Netherlands
    Arthritis Rheum 64:3850-5. 2012
    ....
  17. ncbi request reprint Direct medical costs of traumatic thoracolumbar spine fractures
    Nicole van der Roer
    Department of Clinical Epidemiology and Biostatistics, VU University Medical Center, Amsterdam, The Netherlands
    Acta Orthop 76:662-6. 2005
    ..The costs and cost-effectiveness of treatment of thoracolumbar fractures are poorly known...
  18. pmc Development of AMSTAR: a measurement tool to assess the methodological quality of systematic reviews
    Beverley J Shea
    EMGO Institute, VU University Medical Center, Amsterdam, The Netherlands
    BMC Med Res Methodol 7:10. 2007
    ..Our objective was to develop an instrument to assess the methodological quality of systematic reviews, building upon previous tools, empirical evidence and expert consensus...
  19. ncbi request reprint Development of a standardized method of assessment of radiographs and radiographic change in juvenile idiopathic arthritis: introduction of the Dijkstra composite score
    Marion A J van Rossum
    Emma Children s Hospital AMC, Pediatric Rheumatology, Amsterdam, The Netherlands
    Arthritis Rheum 52:2865-72. 2005
    ..To evaluate the sensitivity to change of a newly developed radiologic assessment tool, the Dijkstra score, and to develop a numeric composite score and progressor classification scheme to apply in juvenile idiopathic arthritis (JIA) trials...
  20. doi request reprint Patient perspective on remission in rheumatoid arthritis
    Lilian H D van Tuyl
    VU University Medical Center, Amsterdam, The Netherlands
    J Rheumatol 38:1735-8. 2011
    ....
  21. pmc Defining remission in rheumatoid arthritis: results of an initial American College of Rheumatology/European League Against Rheumatism consensus conference
    Lilian H D van Tuyl
    VU University Medical Center, Amsterdam, The Netherlands
    Arthritis Rheum 61:704-10. 2009
    ..The need for a uniform definition of remission is vital for research findings to be correctly interpreted...
  22. doi request reprint A first step to assess harm and benefit in clinical trials in one scale
    Maarten Boers
    Department of Epidemiology and Biostatistics, VU University Medical Center, Amsterdam, The Netherlands
    J Clin Epidemiol 63:627-32. 2010
    ..Several systems have been developed for assessment, but few attempt to incorporate both benefit and risk in the same metric while retaining enough simplicity to aid patients and clinicians in their decision making...
  23. ncbi request reprint Glucocorticoids in rheumatoid arthritis: a senescent research agenda on the brink of rejuvenation?
    Maarten Boers
    Department of Clinical Epidemiology and Biostatistics, VU University Medical Center, Amsterdam, The Netherlands
    Best Pract Res Clin Rheumatol 18:21-9. 2004
    ..This chapter focuses on the research agenda in urgent need of execution: to define conclusively the benefit/harm trade-offs and pin down the place of these agents in the treatment cascade...
  24. ncbi request reprint Three trajectories of activity limitations in early symptomatic knee osteoarthritis: a 5-year follow-up study
    Jasmijn F M Holla
    Amsterdam Rehabilitation Research Centre, Reade, Amsterdam, The Netherlands
    Ann Rheum Dis 73:1369-75. 2014
    ..The aim of the present study was to identify homogeneous subgroups with distinct trajectories of activity limitations in patients with early symptomatic knee OA and to describe characteristics of these subgroups...
  25. ncbi request reprint Use and effects of custom-made therapeutic footwear on lower-extremity-related pain and activity limitations in patients with rheumatoid arthritis: A prospective observational study of a cohort
    Rutger Dahmen
    Amsterdam Rehabilitation Research Center, Reade, Amsterdam, The Netherlands
    J Rehabil Med 46:561-7. 2014
    ..Therapeutic footwear is frequently prescribed as part of usual care, but data on its use and effect is incomplete. This study aimed to investigate the use and effects of therapeutic footwear...
  26. doi request reprint Repeatability of 18F-FDG uptake measurements in tumors: a metaanalysis
    Adrianus J de Langen
    Department of Pulmonary Diseases, VU University Medical Center, Amsterdam, The Netherlands
    J Nucl Med 53:701-8. 2012
    ..Therefore, we determined the repeatability of different standardized uptake value (SUV) measurements using the available data...
  27. pmc Minimally important change determined by a visual method integrating an anchor-based and a distribution-based approach
    Henrica C W de Vet
    EMGO Institute, VU University Medical Center, Amsterdam, The Netherlands
    Qual Life Res 16:131-42. 2007
    ..Minimally important changes (MIC) in scores help interpret results from health status instruments. Various distribution-based and anchor-based approaches have been proposed to assess MIC...
  28. pmc Confounding by indication probably distorts the relationship between steroid use and cardiovascular disease in rheumatoid arthritis: results from a prospective cohort study
    Alper M van Sijl
    Department of Rheumatology, VU University Medical Center, Amsterdam, The Netherlands
    PLoS ONE 9:e87965. 2014
    ..To evaluate the risk of cardiovascular disease in patients with rheumatoid arthritis exposed to glucocorticoids...
  29. ncbi request reprint [Prednisone for rheumatoid arthritis: the detriment of the doubt]
    Maarten Boers
    VU Medisch Centrum, afd Epidemiologie and Biostatistiek, Amsterdam, The Netherlands
    Ned Tijdschr Geneeskd 155:A5069. 2012
    ..Existing treatment guidelines need to be urgently updated to reflect these findings...
  30. ncbi request reprint Posttraumatic stress in aging World War II survivors after a fireworks disaster: a controlled prospective study
    Inge Bramsen
    VU University Medical Center, Amsterdam, The Netherlands
    J Trauma Stress 19:291-300. 2006
    ..This unique controlled observation suggests that disasters do increase the levels of posttraumatic stress, and that reactivation of previous traumatic events generally occurs. However, the vulnerability hypothesis was not supported...
  31. ncbi request reprint Use of the American College of Rheumatology N (ACR-N) index of improvement in rheumatoid arthritis: argument in opposition
    Maarten Boers
    VU University Medical Center, Amsterdam, The Netherlands
    Arthritis Rheum 52:1642-5. 2005
  32. ncbi request reprint Making an impact on mortality in rheumatoid arthritis: targeting cardiovascular comorbidity
    Maarten Boers
    Department of Clinical Epidemiology and Biostatistics, VU University Medical Center, Amsterdam, The Netherlands
    Arthritis Rheum 50:1734-9. 2004
  33. ncbi request reprint Practice, efficacy, and costs of thyroid nodule evaluation: a retrospective study in a Dutch university hospital
    Lotty Hooft
    Department of Clinical Epidemiology and Biostatistics, VU University Medical Center, Amsterdam, The Netherlands
    Thyroid 14:287-93. 2004
    ..Thyroid scintigraphy proved most productive in the inadequate FNA category. Improvement of the diagnostic process using immunohistochemistry and/or imaging is needed from the patient's and society's perspective...
  34. ncbi request reprint Can we decide which outcomes should be measured in every clinical trial? A scoping review of the existing conceptual frameworks and processes to develop core outcome sets
    Leanne Idzerda
    From the Centre for Global Health Research, Institute of Population Health, University of Ottawa Department of Medicine, University of Ottawa, Ottawa, Canada and Department of Epidemiology and Biostatistics, VU University Medical Center, Amsterdam, The Netherlands
    J Rheumatol 41:986-93. 2014
    ..As part of the update process of the OMERACT Filter criteria to version 2, a literature review was undertaken to compare and contrast the OMERACT conceptual framework with others within and outside rheumatology...
  35. pmc Updating the OMERACT Filter: Implications for Imaging and Soluble Biomarkers
    Maria Antonietta d'Agostino
    From Versailles Saint Quentin En Yvelines University, Department of Rheumatology, Ambroise Pare Hospital, APHP, Boulogne Billancourt, France Departments of Epidemiology and Biostatistics, and Rheumatology, VU University Medical Center, Amsterdam, The Netherlands University of Bristol, Academic Rheumatology Unit, Bristol Royal Infirmary, Bristol, UK Department of Rheumatology, Leiden University Medical Center, Leiden, The Netherlands Copenhagen Center for Arthritis Research, Center for Rheumatology and Spine Diseases, Copenhagen University Hospital Glostrup, Copenhagen, Denmark Department of Internal Medicine 3 and Institute for Clinical Immunology, University of Erlangen Nuremberg, Erlangen, Germany Department of Clinical Immunology and Rheumatology, Academic Medical Center, University of Amsterdam and Atrium Medical Center, Amsterdam, the Netherlands Department of Medicine, University of Alberta, Edmonton, Alberta, Canada Department of Rheumatology, Hospital General Universitario Gregorio Maranon, Madrid, Spain Paris Descartes University, Medicine Faculty, APHP, Cochin Hospital, Rheumatology B, Paris, France Rheumatology Unit, Sapienza Universita di Roma
    J Rheumatol 41:1016-24. 2014
    ..The Imaging and Soluble Biomarker Session at OMERACT 11 aimed to provide a guide for the iterative development of an imaging or biochemical measurement instrument so it can be used in therapeutic assessment...
  36. doi request reprint Quantitative radiographic features of early knee osteoarthritis: development over 5 years and relationship with symptoms in the CHECK cohort
    Margot B Kinds
    Rheumatology and Clinical Immunology, the Image Sciences Institute, University Medical Center Utrecht, Utrecht, The Netherlands
    J Rheumatol 40:58-65. 2013
    ....
  37. doi request reprint A call for pragmatic treatment trials in rheumatoid arthritis
    Maarten Boers
    Department of Clinical Epidemiology and Biostatistics, VU University Medical Center, Amsterdam, The Netherlands
    Nat Clin Pract Rheumatol 4:292-3. 2008
  38. doi request reprint Delphi process yielded consensus on terminology and research agenda for therapeutic footwear for neuropathic foot
    Rutger Dahmen
    Jan van Breemen Institute, Amsterdam, The Netherlands
    J Clin Epidemiol 61:819-26. 2008
    ..To investigate areas of consensus and disagreement among Dutch physiatrists concerning prescription of therapeutic footwear for the neuropathic foot and to develop a research agenda...
  39. ncbi request reprint Eradication of Helicobacter pylori does not reduce the incidence of gastroduodenal ulcers in patients on long-term NSAID treatment: double-blind, randomized, placebo-controlled trial
    Helena T J I de Leest
    Department of Rheumatology, VU University Medical Center, Amsterdam, The Netherlands
    Helicobacter 12:477-85. 2007
    ..Helicobacter pylori and nonsteroidal antiinflammatory drugs (NSAIDs) are the major causes of gastroduodenal ulcers. Studies on the benefit of eradication of H. pylori in NSAID users yielded conflicting results...
  40. ncbi request reprint Costs of treating bleeding and perforated peptic ulcers in The Netherlands
    Helena de Leest
    Department of Rheumatology, VU University Medical Center, Amsterdam, The Netherlands
    J Rheumatol 31:788-91. 2004
    ..We estimated the direct costs of hospital treatment of bleeding and perforated ulcers in a university hospital, from data in discharge letters and the hospital management information system...
  41. ncbi request reprint Traditional versus up-front [18F] fluorodeoxyglucose-positron emission tomography staging of non-small-cell lung cancer: a Dutch cooperative randomized study
    Gerarda J M Herder
    Department of Pulmonology, VU University Medical Center, Amsterdam, The Netherlands
    J Clin Oncol 24:1800-6. 2006
    ..We investigated whether application of positron emission tomography (PET) immediately after first presentation might simplify staging while maintaining accuracy, as compared with traditional strategy in routine clinical setting...
  42. ncbi request reprint Progression of radiologic damage in patients with rheumatoid arthritis in clinical remission
    Esmeralda T H Molenaar
    VU University Medical Center, Amsterdam, The Netherlands
    Arthritis Rheum 50:36-42. 2004
    ..To assess whether radiologic progression occurs during clinical remission in patients with rheumatoid arthritis (RA)...
  43. ncbi request reprint Add-on or step-up trials for new drug development in rheumatoid arthritis: a new standard?
    Maarten Boers
    Department of Clinical Epidemiology and Biostatistics, VU University Medical Center, Amsterdam, The Netherlands
    Arthritis Rheum 48:1481-3. 2003
  44. ncbi request reprint Scope for improvement in the quality of reporting of systematic reviews. From the Cochrane Musculoskeletal Group
    Beverley Shea
    EMGO Institute, Department of Clinical Epidemiology and Biostatistics, VU University Medical Center, Amsterdam, The Netherlands
    J Rheumatol 33:9-15. 2006
    ..To assess the quality of reporting in Cochrane musculoskeletal systematic reviews (excluding back and injury reviews)...
  45. ncbi request reprint Prevention or retardation of joint damage in rheumatoid arthritis: issues of definition, evaluation and interpretation of plain radiographs
    Maarten Boers
    Department of Clinical Epidemiology and Biostatistics, VU University Medical Center, Amsterdam, The Netherlands
    Drugs 62:1717-24. 2002
    ....
  46. ncbi request reprint COBRA combination therapy in patients with early rheumatoid arthritis: long-term structural benefits of a brief intervention
    Robert B M Landewe
    Department of Internal Medicine Rheumatology, PO Box 5800, University Hospital Maastricht, 6202 AZ Maastricht, The Netherlands
    Arthritis Rheum 46:347-56. 2002
    ..The current study was conducted to investigate whether the benefits of COBRA therapy were sustained over time, and to determine which baseline factors could predict outcome...
  47. ncbi request reprint Repair of erosions in rheumatoid arthritis does occur. Results from 2 studies by the OMERACT Subcommittee on Healing of Erosions
    John T Sharp
    University of Washington, Seattle, Washington, USA
    J Rheumatol 30:1102-7. 2003
    ..This study provides evidence that repair of bone damage in RA does occur, resulting in some degree of improvement, which was recognized by a majority of a panel of experts...
  48. ncbi request reprint MCID/Low Disease Activity State Workshop: low disease activity state in rheumatoid arthritis
    George Wells
    Department of Clinical Epidemiology and Community Medicine, University of Ottawa, Ottawa, Canada
    J Rheumatol 30:1110-1. 2003
    ..This article describes the process of the MCID/Low Disease Activity State Workshop at OMERACT 6 to develop such a definition...
  49. ncbi request reprint MCID/Low Disease Activity State Workshop: summary, recommendations, and research agenda
    George Wells
    Department of Clinical Epidemiology and Community Medicine, University of Ottawa, Ottawa, Ontario, Canada
    J Rheumatol 30:1115-8. 2003
    ..This article presents an overview of that workshop, including results of the voting, a summary of associated discussions, recommendations, and a proposed research agenda...
  50. ncbi request reprint Evidence for interaction between disease severity and comorbidity in rheumatoid arthritis? comment on the article by Navarro-Cano et al
    Maarten Boers
    Arthritis Rheum 50:1695; author reply 1696-7. 2004
  51. ncbi request reprint Understanding the window of opportunity concept in early rheumatoid arthritis
    Maarten Boers
    Arthritis Rheum 48:1771-4. 2003
  52. ncbi request reprint Can progression of radiographic joint damage be predicted early in rheumatoid arthritis?
    Alexandre E Voskuyl
    J Rheumatol 30:905-7. 2003
  53. ncbi request reprint Abatacept in rheumatoid arthritis: a new branch on the "biologics" tree
    Maarten Boers
    Ann Intern Med 144:933-5. 2006
  54. ncbi request reprint Economic evaluation of programs or interventions in the management of rheumatoid arthritis: defining a consensus-based reference case
    Andreas Maetzel
    Division of Clinical Decision Making and Health Care Research, Toronto General Research Institute, University Health Network, Toronto, Ontario, Canada
    J Rheumatol 30:891-6. 2003
    ..We provide the rationale for each element and discuss how each element has been addressed in published economic evaluations of DMARD...
  55. ncbi request reprint Outcomes from the Patient Perspective Workshop at OMERACT 6
    John Kirwan
    University of Bristol Rheumatology Unit, Bristol Royal Infirmary, Bristol, UK
    J Rheumatol 30:868-72. 2003
    ....
  56. ncbi request reprint Radiologic features in juvenile idiopathic arthritis: a first step in the development of a standardized assessment method
    Marion A J van Rossum
    Department of Pediatrics, Leiden University Medical Center, Leiden, The Netherlands
    Arthritis Rheum 48:507-15. 2003
    ....
  57. ncbi request reprint Association of baseline levels of markers of bone and cartilage degradation with long-term progression of joint damage in patients with early rheumatoid arthritis: the COBRA study
    Patrick Garnero
    INSERM Research Unit 403, and Synarc, Lyon, France
    Arthritis Rheum 46:2847-56. 2002
    ....
  58. ncbi request reprint Detecting radiological changes in rheumatoid arthritis that are considered important by clinical experts: influence of reading with or without known sequence
    Karin Bruynesteyn
    Division of Rheumatology, Maastricht University, Maastricht, The Netherlands
    J Rheumatol 29:2306-12. 2002
    ....
  59. ncbi request reprint Contribution of progression of erosive damage in previously eroded joints in early rheumatoid arthritis trials: COBRA trial as an example
    Karin Bruynesteyn
    University of Maastricht, Maastricht, The Netherlands
    Arthritis Rheum 47:532-6. 2002
    ..The aim of this study is to evaluate the relative contribution of separate components of the erosion score of the modified Sharp/van der Heijde method in early RA...
  60. ncbi request reprint How to report radiographic data in randomized clinical trials in rheumatoid arthritis: guidelines from a roundtable discussion
    Desiree van der Heijde
    Department of Internal Medicine, University Hospital Maastricht, Maastricht, The Netherlands
    Arthritis Rheum 47:215-8. 2002
  61. ncbi request reprint Determination of the minimal clinically important difference in rheumatoid arthritis joint damage of the Sharp/van der Heijde and Larsen/Scott scoring methods by clinical experts and comparison with the smallest detectable difference
    Karin Bruynesteyn
    Maastricht University, Maastricht, The Netherlands
    Arthritis Rheum 46:913-20. 2002
    ....
  62. ncbi request reprint OMERACT 6 Economics Working Group report: a proposal for a reference case for economic evaluation in rheumatoid arthritis
    Sherine Gabriel
    Department of Health Sciences Research, Mayo Clinic, Rochester, Minnesota 55905, USA
    J Rheumatol 30:886-90. 2003
    ..Through these efforts, the OMERACT Economics Working Group aims to expedite and enhance the conduct and dissemination of methodological research in economic analyses in the rheumatic diseases...
  63. ncbi request reprint Markers for type II collagen breakdown predict the effect of disease-modifying treatment on long-term radiographic progression in patients with rheumatoid arthritis
    Robert Landewe
    Department of Internal Medicine Rheumatology, University Hospital Maastricht, PO Box 5800, 6202 AZ Maastricht, The Netherlands
    Arthritis Rheum 50:1390-9. 2004
    ....
  64. pmc Rationale and design of The Delphi Trial--I(RCT)2: international randomized clinical trial of rheumatoid craniocervical treatment, an intervention-prognostic trial comparing 'early' surgery with conservative treatment [ISRCTN65076841]
    Jasper F C Wolfs
    Department of Neurosurgery, Leiden University Medical Center, The Netherlands
    BMC Musculoskelet Disord 7:14. 2006
    ..If signs and symptoms of myelopathy are present there is little chance of recovery to normal levels after surgery...
  65. ncbi request reprint Testing of the preliminary OMERACT validation criteria for a biomarker to be regarded as reflecting structural damage endpoints in rheumatoid arthritis clinical trials: the example of C-reactive protein
    Stephanie O Keeling
    Department of Medicine, University of Alberta, Edmonton, Alberta, Canada
    J Rheumatol 34:623-33. 2007
    ..2) To assess the strength of recommendation for inclusion of individual criteria in the draft set...
  66. ncbi request reprint Development of draft validation criteria for a soluble biomarker to be regarded as a valid biomarker reflecting structural damage endpoints in rheumatoid arthritis and spondyloarthritis clinical trials
    Walter P Maksymowych
    Department of Medicine, University of Alberta, Edmonton, Alberta, Canada
    J Rheumatol 34:634-40. 2007
    ..Our objective was to develop validation criteria for a soluble biomarker to be regarded as a valid biomarker reflecting radiological endpoints in RA and SpA clinical trials...
  67. pmc Why are Dutch rheumatologists reluctant to use the COBRA treatment strategy in early rheumatoid arthritis?
    Lilian H D van Tuyl
    Department of Clinical Epidemiology and Biostatistics, VU University Medical Center, PO Box 7057, 1053 MB Amsterdam, The Netherlands
    Ann Rheum Dis 66:974-6. 2007
    ..In addition, 5 years of follow-up proved that COBRA therapy results in sustained reduction of the rate of radiological progression. Despite this evidence, Dutch rheumatologists seem reluctant to prescribe COBRA therapy...
  68. ncbi request reprint Studying the benefit/risk ratio of glucocorticoids in rheumatoid arthritis
    Maarten Boers
    J Rheumatol 34:661-3. 2007
  69. ncbi request reprint Is there a preferred method for scoring activity of the spine by magnetic resonance imaging in ankylosing spondylitis?
    Desiree van der Heijde
    Department of Internal Medicine, Division of Rheumatology, University Hospital Maastricht and CAPHRI Research Institute, University Maastricht, The Netherlands d vanderheijde kpnplanet nl
    J Rheumatol 34:871-3. 2007
    ..The Berlin and SPARCC methods were preferred most frequently. The development of a new method combining the best elements of all methods is an additional possibility...
  70. ncbi request reprint Rationale and strategies for reevaluating the ACR20
    David T Felson
    Boston University School of Medicine, Boston, Massachusetts 02118, USA
    J Rheumatol 34:1184-7. 2007
    ..To assess whether the American College of Rheumatology response criteria ACR20 should be replaced by another definition of response with enhanced discriminant validity...
  71. pmc Minimal clinically important improvement and patient acceptable symptom state for subjective outcome measures in rheumatic disorders
    Florence Tubach
    Département d Epidémiologie, Biostatistique et Recherche Clinique, Hopital Bichat, Paris, France
    J Rheumatol 34:1188-93. 2007
    ..The purpose of this SIG at OMERACT 8 was to inform participants of the MCII and PASS concepts and to agree on MCII and PASS values for pain, patient global assessment, and functional impairment...
  72. pmc Long-term outcome of juvenile idiopathic arthritis following a placebo-controlled trial: sustained benefits of early sulfasalazine treatment
    Marion A J van Rossum
    Emma Children s Hospital AMC, Paediatric Rheumatology, G8 205, PO Box 22660, 1100 DD Amsterdam, The Netherlands
    Ann Rheum Dis 66:1518-24. 2007
    ..The current study determines the long-term outcome of the trial participants and evaluates whether the benefits of SSZ allocation are sustained over time...
  73. ncbi request reprint Minimal disease activity, remission, and the long-term outcomes of rheumatoid arthritis
    Frederick Wolfe
    National Data Bank for Rheumatic Diseases, Wichita, Kansas 67214, USA
    Arthritis Rheum 57:935-42. 2007
    ....
  74. ncbi request reprint Current status of outcome measures in vasculitis: focus on Wegener's granulomatosis and microscopic polyangiitis. Report from OMERACT 7
    Peter A Merkel
    Boston University School of Medicine, Boston, MA 02118, USA
    J Rheumatol 32:2488-95. 2005
    ....
  75. ncbi request reprint Why publish a secondary analysis of only one treatment group in the Behandelstrategieën voor Reumatoide Artritis trial? Comment on the article by van der Bijl et al
    Maarten Boers
    Arthritis Rheum 56:3876; author reply 2876-7. 2007
  76. ncbi request reprint Minimal disease activity for rheumatoid arthritis: a preliminary definition
    George A Wells
    Department of Epidemiology and Community Medicine, University of Ottawa, Ottawa, Ontario, Canada
    J Rheumatol 32:2016-24. 2005
    ..This set of 2 definitions gained approval of 73% of the attendees. These (and other) definitions will now be subject to further validation in other databases...
  77. ncbi request reprint The relationship between disease activity and radiologic progression in patients with rheumatoid arthritis: a longitudinal analysis
    Paco M J Welsing
    University Medical Center Nijmegen, Nijmegen, The Netherlands
    Arthritis Rheum 50:2082-93. 2004
    ....
  78. ncbi request reprint The Sharp/van der Heijde method out-performed the Larsen/Scott method on the individual patient level in assessing radiographs in early rheumatoid arthritis
    Karin Bruynesteyn
    Department of Internal Medicine, Division of Rheumatology, University of Maastricht, P O Box 5800, 6202 AZ, Maastricht, The Netherlands
    J Clin Epidemiol 57:502-12. 2004
    ..To test the reliability of two radiologic scoring methods in rheumatoid arthritis (RA)--the Sharp/van der Heijde (SvH) and the Larsen/Scott (LS)--with generalizability analyses...
  79. ncbi request reprint Variability of precision in scoring radiographic abnormalities in rheumatoid arthritis by experienced readers
    John T Sharp
    University of Washington School of Medicine, Seattle, Washington, USA
    J Rheumatol 31:1062-72. 2004
    ..To determine the extent of precision and sources of variability among experts on scoring radiographic abnormalities in rheumatoid arthritis...
  80. ncbi request reprint Assessing single joints in arthritis clinical trials
    Jon T Giles
    Division of Rheumatology, Johns Hopkins University, Baltimore, Maryland 21224, USA
    J Rheumatol 34:641-7. 2007
    ..At OMERACT 8, the group developed a research agenda to perform additional validation studies of clinical and functional indices, imaging, synovial histopathology, and soluble biomarkers...
  81. ncbi request reprint The benefit of low-dose glucocorticoid treatment in early rheumatoid arthritis may outweigh the risk: comment on the editorial by Harris
    Johannes W G Jacobs
    Arthritis Rheum 54:2031-2; author reply 2032. 2006