Prediction of Disease Severity in Patients with Early Rheumatoid Arthritis by Gene Expression Profiling

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Figure 5

PCA classification of ERA and established RA patients by the 19-gene predictor. Two-dimensional projection of 26 patients based upon their gene expression levels of 19-predictor genes onto the ( $\text{[math]}$ ) plane. Green squares represent the future mild disease group and red squares represent the future severe disease group. The dashed line segregates the future severe and mild groups of RA patients with 100% accuracy.