The Effect of Etanercept in Nonradiographic Axial Spondyloarthritis by Stratified C-Reactive Protein Levels.

Although there are reduced ASAS20 and ASAS40 response rates in the groups with baseline CRP less than 10 mg/L, there remain clinically relevant responses when the composite outcome measures ASDAS-CRP or ASDAS-ESR were used, and this should be considered when deciding on thresholds for reimbursement.