Instrument | Mean ± SD (minimum-maximum) | Spearman rho | |
---|---|---|---|
RADAI-5 | SDAI | ||
RADAI-5 | 3.4 ± 2.2 (0.0-10.0) | 0.737* | |
DAS28 | 3.31 ± 1.37 (0.38-8.09) | 0.655* | 0.882* |
SDAI | 10.4 ± 10.2 (0.0-65.9) | 0.737* |
↵* p < 0.01. RADAI-5: Rheumatoid Arthritis Disease Activity Index comprising 5 questions; DAS28: Disease Activity Score comprising a 28-joint count; SDAI: Simplified Disease Activity Index.