JOURNAL ARTICLE
MULTICENTER STUDY
RANDOMIZED CONTROLLED TRIAL

Early MRI measures independently predict 1-year and 2-year radiographic progression in rheumatoid arthritis: secondary analysis from a large clinical trial

Joshua F Baker, Mikkel Ostergaard, Paul Emery, Elizabeth C Hsia, Jiandong Lu, Daniel G Baker, Philip G Conaghan
Annals of the Rheumatic Diseases 2014, 73 (11): 1968-74
23904470

OBJECTIVE: To determine if early MRI measures predict X-ray progression at 1 and 2 years in a large RA trial cohort.

DESIGN: This study included 256 methotrexate (MTX)-naïve RA patients from a randomised placebo-controlled trial of golimumab (GO-BEFORE). MRIs of wrist and 2nd-5th metacarpophalangeal joints at 0, 12, 24, 52 and 104 weeks were obtained and scored using the RAMRIS system. Multivariable logistic regression examined if baseline and early change (weeks 12/24) in RAMRIS scores independently predicted progression of the van der Heijde-Sharp (vdHS) score and MRI erosion score at 1 and 2 years of follow-up.

RESULTS: High baseline score and poor improvement over the first 24 weeks in synovitis (p=0.003 and p=0.003, respectively) and in bone oedema (p=0.02 and p=0.001, respectively) were independent predictors of X-ray progression at 1 year. Associations were significant or tended towards an association at 2 years. An increase in RAMRIS bone erosion >0.5 at weeks 12 and 24 also predicted X-ray progression (p<0.003). Poor 12-week improvement in bone oedema was associated with X-ray and MRI progression at 1 year (p<0.05). Regression models that incorporated baseline and 12-week and 24-week changes in MRI measures of synovitis (AUC=0.71) and bone oedema (AUC=0.70) improved the prediction of X-ray progression at 1 year above clinical disease activity alone (AUC=0.66, p<0.04).

CONCLUSIONS: Baseline and early changes in MRI measures independently predicted X-ray and MRI progression at later time-points. The predictive validity established here supports potential use in shorter-duration studies to determine efficacy of RA therapies in preventing structural damage.

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