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Table 4 Association between the number of PET/CT-positive joints or cumulative SUV and disease activity based on DAS28-CRP or CDAI. DAS disease activity score, CRP C-reactive protein, CDAI clinical disease activity index, PET/CT positron emission computer tomography, SUV standard uptake value, AUC area under the curve, SD standard deviation

From: Dissociation between 2-[18F]fluoro-2-deoxy-D-glucose positron emission computed tomography, ultrasound and clinical assessments in patients with non-severe rheumatoid arthritis, including remission

Clinical disease activity N Number of PET/CT- positive joints Cumulative SUV
Mean ± SD Cut-off (AUC) P-value Mean ± SD Cut-off (AUC) P-value
DAS28-CRP    8.0 (0.77) 0.0026   17.8 (0.77) 0.0046
Non-severe≤5.1 53 4.2 ± 6.1    9.2 ± 14.1   
Severe> 5.1 10 13.6 ± 11.2    31.9 ± 29.9   
CDAI    6.8 (0.67) 0.023   15.0 (0.65) 0.033
Non-severe≤22 48 4.4 ± 6.3    9.7 ± 14.6   
Severe> 22 15 10.0 ± 10.6    22.9 ± 27.5