Frequency of non-cardiac-specific autoantibodies by immunofluorescence and ELISA in patients with idiopathic recurrent acute pericarditis (IRAP) and in normal control subjects
| IRAP (n=40) | Normal subjects (n=375) | p Value | |
| Anti-mitochondrial, n (%) | 0 (0) | 1 (0.3) | NS |
| Antinuclear, titre ≥1/160 | 2 (5) | 2 (0.5) | 0.04 |
| Anti-thyroid, n (%) | 0 (0) | 26 (7) | NS |
| Anti-islet cell, n (%) | 0 (0) | 4 (1) | NS |
| Anti-parietal cell, n (%) | 2 (5) | 7 (1.8) | NS |
| Anti-adrenal cell, n (%) | 0 (0) | 0 (0) | NS |
| (n=40) | (n=75) | ||
| Anti-Ro/SSA | 1 (2) | 1 (1) | NS |
| Anti-La/SSB | 0 (0) | 0 (0) | NS |