Table 4

Sensitivity, specificity, positive likelihood ratios and calculated cut-offs for each test by use of a cost function (weighting of 5)

Sensitivity (%)Specificity (%)Positive likelihood ratioCalculated cut-off
6 months Δ mTSS >0
 RF70551.568.06
 Anti-CCP65682.0336.86
65671.9750.84
12 months Δ mTSS >0
 RF85351.314.95
 Anti-CCP66682.0625.10
6 months Δ erosion score >0
 RF73551.627.99
 Anti-CCP66692.1390.03
12 months Δ erosion score >0
 RF87351.344.95
 Anti-CCP68682.1225.01
  • anti-CCP, anti-cyclic citrullinated peptide; mTSS, modified total Sharp score; RF, rheumatoid factor.