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Table 1 Characteristics of the 228 rheumatoid arthritis patients

From: Presence and utility of IgA-class antibodies to cyclic citrullinated peptides in early rheumatoid arthritis: the Swedish TIRA project

  Total IgA anti-CCP-positive, IgG anti-CCP-positive IgA anti-CCP-negative, IgG anti-CCP-positive
Number of patients 228 66 72
   Mean age (years) 55 57 52
Number of women:men 158:70 48:18 46:26
   Mean age (years) 54:59 55:62 51:53
Number of agglutinating rheumatoid factor-positive 142 56 68
   (%) 63 85 84
IgM-rheumatoid factor-positive (%) 74 98 96
   Median level (U/ml) 114 247 184
IgA-rheumatoid factor-positive (%) 73 97 87
   Median level (U/ml) 45 83 58
IgG anti-CCP-positive (%) 64 100 100
   Median level among positive cases (U/ml) 520 1017 222
  1. IgA anti-CCP, IgA-class antibodies against cyclic citrullinated peptides; IgG anti-CCP, IgG-class antibodies against cyclic citrullinated peptides