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Table 2 Associated diseases and autoantibodies in SPS patients

From: Quantitative clinical and autoimmune assessments in stiff person syndrome: evidence for a progressive disorder

Associated diseases n (%)
 Autoimmune thyroiditis 17 (30)
 Insulin dependant diabetes mellitus (IDDM) 16 (28)
 Pernicious anemia (PA) 11 (19)
 Epilepsy 9 (15)
 Vitiligo 2 (3)
 Rheumatoid arthritis 1 (1)
 Autoimmune pancreatitis 1 (1)
 Irritable bowl syndrome 1 (1)
 Monoclonal gammopathy of unknown significance 1 (1)
Antibodies n (%)
 Anti-nuclear antigen (ANA) 26 (45)
 Anti-cardiolipin IgG and IgM (ACA) 10 (17)
 (Anti-nuclear and cardiolipin antibodies together) 7 (12)
 Thyroid peroxidase antibody 23 (40)
 Anti-thyroglobulin antibody 20 (35)
 (Thyroid peroxidase and thyroglobulin antibodies together) 16 (28)
 Anti-thyroid microsomal antibody 1 (1)
 Anti-parietal cell antibody 18 (31)
 Anti-islet cell antibody 6 (10)
 Anti-gliadin antibody 6 (10)
 Intrinsic factor blocking antibody 3 (5)
 Anti-JO-1 antibody 3 (5)
 Anti-ENA (RNPSM) 2 (3)
 Rheumatoid factor (RF) 1 (1)