Table 3: Predictors of DAS28 with PROs variables.

β * P

Constant2.021<0.001
RAPID40.0370.03
Patient SJC0.042<0.001
RADAI0.0730.48
Patient TJC0.0090.49
Gender−0.1230.44
RA duration0.0290.83
Education level0.1270.35

PROs: patient reported outcomes; β: beta coefficient; P: P value; RAPID: routine assessment of patient index data; SJC: swollen joint count; TJC: tender joint count; RA: rheumatoid arthritis.
*The beta coefficients give a measure of the contribution of each variable to the model. A large value indicates that a unit change in this predictor variable has a large effect on the criterion variable (DAS28).