ACR Meeting Abstracts

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Abstracts tagged "Missing data"

  • Abstract Number: 198 • 2019 ACR/ARP Annual Meeting

    Assessing Care Quality in Rheumatology Services

    Mark Yates1, Sam Norton 1, Alexander MacGregor 2, Katie Bechman 3, Sanketh Rampes 3 and James Galloway 4, 1Kings College London, London, 2University of East Anglia, Norwich, United Kingdom, 3King's College London, London, United Kingdom, 4Kings College London, London, United Kingdom

    Background/Purpose: There is high-quality evidence that prompt diagnosis and treatment have beneficial impact on outcomes in RA. Current guidelines from both North America and Europe…
  • Abstract Number: 902 • 2018 ACR/ARHP Annual Meeting

    Longitudinal Trends in Clinical Disease Features after Myeloablative Autologous Stem-Cell Transplantation or Cyclophosphamide in Severe Scleroderma

    Lynette Keyes-Elstein1, Ellen Goldmuntz2, Ashley Pinckney3, Leslie Crofford4, Daniel E. Furst5, Maureen D. Mayes6, Peter McSweeney7, Richard Nash7, Beverly Welch8 and Keith Sullivan9, 1Biostatistics, Rho Federal Systems, Inc, Chapel Hill, NC, 2NIAID, NIH, Bethesda, MD, 3Rho Federal Systems, Inc., Chapel Hill, NC, 4Division of Rheumatology and Immunology, Vanderbilt University Medical Center, Nashville, TN, 5UCLA, Los Angeles, CA, 6Rheumatology, University of Texas McGovern Medical School, Houston, TX, 7Colorado Blood Cancer Institute, Denver, CO, 86610 Rockledge Dr., NIAID/NIH, Bethesda, MD, 9Duke University Medical Center, Durham, NC

    Background/Purpose: The Scleroderma: Cyclophosphamide or Transplantation (SCOT) study established the long-term superiority of hematopoietic stem cell transplant (HSCT) over cyclophosphamide (CYC) [Sullivan KM, et al.…
  • Abstract Number: 2874 • 2018 ACR/ARHP Annual Meeting

    Comparison of Missing Data Reporting and Handling in Randomized Controlled Trials of Rheumatoid Arthritis Drug Therapy: A Snapshot Ten Years Apart

    Fawad Aslam1, Karina Torralba2 and Nasim A. Khan3, 1Rheumatology, Mayo Clinic, Scottsdale, AZ, 2University of Southern California, LA, CA, 3Rheumatology, Univ of Arkansas for Med Sci, Little Rock, AR

    Background/Purpose: Intention-to-treat (ITT) principle is recommended to analyze randomized controlled trials (RCTs). It entails analyzing all subjects per the assigned group at randomization to avoid…
  • Abstract Number: 2931 • 2018 ACR/ARHP Annual Meeting

    Missing Outcomes in SLE Clinical Trials: Impact on Estimating Treatment Effects

    Mimi Kim1, Joan T. Merrill2, Kenneth C. Kalunian3, Leslie Hanrahan4 and Peter M. Izmirly5, 1Epidemiology and Population Health, Albert Einstein College of Medicine, Bronx, NY, 2University of Oklahoma Health Sciences Center, Oklahoma City, OK, 3Division of Rheumatology, Allergy and Immunology, UCSD School of Medicine, La Jolla, CA, 4Lupus Foundation of America, Washington DC, DC, 5NYU Langone Health, New York, NY

    Background/Purpose:  Missing data due to drop-out and loss to follow-up is a common problem in SLE trials. The usual approaches for handling this issue include…
  • Abstract Number: 2137 • 2014 ACR/ARHP Annual Meeting

    Linear Extrapolation of Missing Radiographic Progression Scores Does Not Spuriously overestimate overall Radiographic Progression in Rheumatoid Arthritis

    Iris Markusse1, Robert Landewé2,3, Meilien Ho4, Martin Jenkins4 and Desiree van der Heijde5, 1Leiden University Medical Center, Leiden, Netherlands, 2Academic Medical Center, University of Amsterdam, Amsterdam, Netherlands, 3Atrium Medical Center, Heerlen, Netherlands, 4AstraZeneca R&D Alderley Park, Macclesfield, United Kingdom, 5Department of Rheumatology, Leiden University Medical Center, Leiden, Netherlands

    Background/Purpose : Linear Extrapolation (LE) is a frequently applied method to impute missing radiographic data in trials. However, there is frequent critique that LE overestimates…
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All abstracts accepted to ACR Convergence are under media embargo once the ACR has notified presenters of their abstract’s acceptance. They may be presented at other meetings or published as manuscripts after this time but should not be discussed in non-scholarly venues or outlets. The following embargo policies are strictly enforced by the ACR.

Accepted abstracts are made available to the public online in advance of the meeting and are published in a special online supplement of our scientific journal, Arthritis & Rheumatology. Information contained in those abstracts may not be released until the abstracts appear online. In an exception to the media embargo, academic institutions, private organizations, and companies with products whose value may be influenced by information contained in an abstract may issue a press release to coincide with the availability of an ACR abstract on the ACR website. However, the ACR continues to require that information that goes beyond that contained in the abstract (e.g., discussion of the abstract done as part of editorial news coverage) is under media embargo until 10:00 AM ET on November 14, 2024. Journalists with access to embargoed information cannot release articles or editorial news coverage before this time. Editorial news coverage is considered original articles/videos developed by employed journalists to report facts, commentary, and subject matter expert quotes in a narrative form using a variety of sources (e.g., research, announcements, press releases, events, etc.).

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