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Fig. 1 | Arthritis Research & Therapy

Fig. 1

From: A single determination of C-reactive protein does not suffice to declare a patient with a diagnosis of axial spondyloarthritis ‘CRP-negative’

Fig. 1

Percentage of C-reactive protein (CRP) tests subsequently elevated or normal by previous CRP level.

Based on all available within-patient pairs of CRP assessment 4 or 12 weeks apart. Data included are from weeks 0, 4, 8, 12, 16, 20, and 24. Elevated CRP was defined as CRP > ULN (7.9 mg/L) and values ≤ 7.9 mg/L were considered normal

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