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 Landewé^2,3, 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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