From: Epidemiology and demographics of juvenile idiopathic arthritis in Africa and Middle East
 | Northern Europe (n = 845) | Western Europe (n = 832) | Southern Europe (n = 2400) | Eastern Europe (n = 2044) | North America (n = 523) | Latin America (n = 849) | Africa and Middle East (n = 1209) | Southeast Asia (n = 379) |
---|---|---|---|---|---|---|---|---|
Girls | 593 (70.2%) | 538 (64.7%) | 1763 (73.5%) | 1303 (63.7%) | 374 (71.5%) | 550 (64.8%) | 745 (61.6%) | 164 (43.3%) |
Boys | 252 (29.8%) | 294 (35.3%) | 637 (26.5%) | 741 (36.3%) | 149 (28.5%) | 299 (35.2%) | 463 (38.3%) | 215 (56.7%) |
Age at onset (years) | 4.7 (2.2 – 9.4) | 6.4 (2.7 – 10.4) | 3.5 (1.9 – 7.3) | 6.7 (3.0 – 10.7) | 7.4 (3.1 – 10.9) | 6.8 (3.6 – 10.5) | 6.0 (2.9 – 9.8) | 7.0 (3.9 – 10.7) |
Interval onset-referral (years) | 0.3 (0.1 – 0.8) | 0.4 (0.2 – 1.0) | 0.3 (0.1 – 0.9) | 0.3 (0.1 – 1.0) | 0.3 (0.1 – 0.8) | 0.4 (0.2 – 1.0) | 0.4 (0.2 – 1.5) | 0.6 (0.2 – 2.0) |
Disease duration (years) | 5.0 (2.5 – 8.4) | 3.8 (1.8 – 6.7) | 4.4 (1.9 – 7.7) | 3.4 (1.6 – 6.2) | 4.4 (1.9 – 8.0) | 4.6 (2.1 – 7.3) | 2.8 (1.2 – 5.4) | 3.9 (1.9 – 6.7) |
Uveitis | 161 (19.1%) | 94 (11.3%) | 450 (18.8%) | 183 (9.0%) | 59 (11.3%) | 54 (6.4%) | 71 (5.9%) | 19 (5.0%) |