The purpose of this study is to investigate opportunities for prevention and treatment of knee osteoarthritis (OA) by evaluating potentially modifiable risk factors for disease and poor pain and physical function outcomes especially among those with early or mild knee symptoms. The goal of the study is to find novel strategies to prevent disease at an early stage and to limit the impact of disease once it has occurred.
MOST study participants in the "Existing Cohort" (3,026 subjects) were enrolled in the original study in 2003-2005. Surviving Existing Cohort participants without end-stage knee osteoarthritis will be asked to participate in the 144-, 152-, 160- and 168-month follow-up contacts. In addition, in 2016-2018 the cohort will be enriched by the recruitment of an additional 1,500 "New Cohort" participants with early or mild knee symptoms. The goal of the study is to find novel strategies to prevent disease at an early stage.
Study Type
OBSERVATIONAL
Enrollment
4,185
University of Alabama at Birmingham
Birmingham, Alabama, United States
University of Iowa
Iowa City, Iowa, United States
Boston University School of Medicine
Boston, Massachusetts, United States
Worsening knee pain
Worsening knee pain defined as reaching minimally clinically important difference (MCID) for worsening on the Western Ontario and McMaster Universities Osteoarthritis Index (WOMAC) pain questionnaire
Time frame: Change from baseline (144-month) at ≥2 follow-up contacts (152-, 160-, 168-month follow-up contacts)
Incident cartilage loss on MRI
Incidence of cartilage loss on MRI extending to the bone
Time frame: Change from baseline (144-month) at 168-month follow-up contact
Function loss
Defined as minimally clinically important difference (MCID) for worsening on the Western Ontario and McMaster Universities Osteoarthritis Index (WOMAC) function questionnaire
Time frame: Change from baseline (144-month) at ≥2 follow-up contacts (152-, 160-, 168-month follow-up contacts)
Onset of constant knee pain
Self- report
Time frame: Change from baseline (144-month) at ≥2 follow-up contacts (152-, 160-, 168-month follow-up contacts)
Worsening on MRI
Worsening cartilage scores, bone marrow lesion, or meniscal damage
Time frame: Change from baseline (144-month) at 168-month follow-up contact
Worsening on X-ray
Increased Kellgren-Lawrence (KL) grade score, new KL grade 2 score, or semi-quantitative joint space loss in any compartment
Time frame: Change from baseline (144-month) at 168-month follow-up contact
New onset knee buckling
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Self-report
Time frame: Change from baseline (144-month) at ≥1 follow-up contact (152-, 160-, 168-month follow-up contacts)
New repeated falls
Self-report
Time frame: Change from baseline (144-month) at ≥1 follow-up contact (152-, 160-, 168-month follow-up contacts)