Table 2

Distribution of 2nd AI in 309 patients who had RA

DiagnosisSLEAPSSjögren'sOther rheumThyroidNon-rheumNo.TotalPer cent
RA only21770
+16
+3
RA +1 other dx+138126
+7
+25
+17
++1
++2
++2
RA + >2 other dx+++2114
++1
+++1
++1
++1
ALL RA2541611292192309100

  • There was no dominant illness accounting for overlap.

  • 2nd AI, second autoimmune illness; APS, antiphospholipid syndrome; dx, diagnosis; RA, rheumatoid arthritis; rheum, rheumatic 2nd AI; SLE, systemic lupus erythematosus.