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Table 1 Evaluation of IFA, multiplex and ELISA antinuclear antibody testing in pediatric JIA patients

From: Comparison of multiplex, ELISA and immunofluorescence for detecting autoantibodies in JIA patients

   Number testing positive
   IFA Multiplex ELISA
Types of JIA # of Samples (n-184) Hep-2 Microparticle A. B. C.
Pauciarticular 82 62 27 *(3) + **(7) 4 + *(1) 32 + *(5) 52 + *(8)
Polyarticular 63 34 16 *(2) + **(1) 10 + *(4) 30 + *(14) 46 + *(21)
Systemic 19 3 5 + *(4) 1 + *(1) 6 + *(4) 12 + *(12)
All JIA with ≥ 1:160 IFA 164 52 22    
Normals 20 6 1 + **(2) 0 + **(2) 4 + *(1) 5 + *(2)
  1. Numbers in parentheses: * IFA Negative(s) that were Positive. **IFA Positives that were Equivocal