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Table 1 Demographic, clinical, and laboratory characteristics of JRA patients, according to disease onset subtype

From: Mannose-binding lectin deficiency is associated with early onset of polyarticular juvenile rheumatoid arthritis: a cohort study

Characteristic All JRA patients (n = 218) JRA subgroups P
   Polyarthritis (n = 67) Oligoarthritis (n = 151)  
Demographic variables     
   Males (n [%]) 59 (27%) 19 (28%) 40 (27%) 0.87
   Age (years) at onset 8.0 (3.7 to 11.6) 9.4 (5.5 to 12.9) 7.3 (3.1 to 11.5) <0.01
   Disease duration (years) at follow up 14.8 (13.6 to 16.2) 14.6 (13.4 to 16.3) 15.0 (13.8 to 16.2) 0.68
Clinical variables     
   Number of cumulative affected joints 5 (2 to 15) 20 (11 to 34) 4 (2 to 6) <0.01
   Arthritis severity index 2 (0 to 11) 12 (2 to 37) 2 (0 to 5) <0.01
   Physician global assessment 1 (1 to 2) 2 (1 to 3) 1 (1 to 2) <0.01
   Childhood Health Assessment Questionnaire score 0 (0 to 0.4) 0.1 (0 to 0.6) 0 (0 to 0.3) <0.01
   Patients with uveitis (n [%]) 42 (19%) 10 (15%) 34 (23%) 0.27
   Remission status at follow-up (n [%])     
Current remission 122 (56%) 32 (48%) 90 (60%) <0.01
Active but previous remission 55 (25%) 14 (21%) 41 (27%)  
Continuously active 41 (19%) 21 (31%) 20 (13%)  
   Radiographic erosions grade III to IV (n [%]) 51 (23%) 30 (45%) 21 (14%) <0.01
Laboratory variables     
   Erythrocyte sedimentation rate (mm/hour) 6 (4 to 13) 7 (4 to 22) 6 (4 to 11) 0.19
   C-reactive protein (mg/l) 5 (3 to 6) 5 (3 to 14) 5 (1 to 5) <0.01
   Antinuclear antibody positivity 79 (36%) 17 (26%) 62 (41%) 0.03
   IgM-rheumatoid factor positivity 11 (5%) 11 (16%) 0 (0%) <0.01
  1. Continuous variables are presented as median (interquartile range [IQR]). JRA, juvenile rheumatoid arthritis.