Fig. 1

The proportion of patients with and without FAA according to each disease activity index. a DAS28-ESR, b SDAI, c CDAI, d RAPID3: Patients with FAA were worse disease activity than those without FAA as per DAS28, SDAI, CDAI, and RAPID3. Among various indices, patients with FAA were less likely to achieve remission in SDAI (n = 6, 1.0%) and CDAI (n = 3, 0.5%) than in DAS28-ESR (n = 21, 3.5%), DAS28-CRP (n = 38, 6.4%), RAPID3 (n = 12, 2.0%). CDAI, clinical disease activity index; DAS, disease activity score; ESR, erythrocyte segmentation rate; SDAI, simplified disease activity index; RAPID3, routine assessment of patient index data 3