Table 1.
Profiles of JIA patients presenting at University Teaching Hospital, Lusaka, Zambia from 1994–98 &2006–2010
| JIA subtypes | Total number (%) | Female: male ratio | Mean age at disease onset (Years ±STD) | Age range at onset (Years) | Mean age at presentation (Years ±STD) | Age range at presentation (Years) |
|---|---|---|---|---|---|---|
| Overall |
78(100%) |
1.2:1 |
8.70±5.00 |
1–15 |
11.3±5.8 |
2–25 |
| Systemic JIA |
11(14.1%) |
1:1.2 |
6±4.3 |
2–15 |
8±4.00 |
4.5–18 |
| Polyarticular RF̄(−) JIA |
27(34.6%) |
1.7:1 |
10.70±3.4 |
3–15 |
12.89±3.8 |
4–16 |
| Polyarticular RF̄(+) JIA |
9(11.5%) |
9:0 |
11.0±4.5 |
3–15 |
16.0±7.0 |
4–24 |
| Oligoarticular arthritis |
25(32.0%) |
1:1.1 |
6.6±4.3 |
1–14 |
8.1±4.7 |
1.6–18 |
| Psoriatic arthritis JIA |
1(1.3%) |
NA |
13 |
NA |
9 |
NA |
| Enthesitis related arthritis |
5(6.4%) |
1:4 |
10.9±4.8 |
2–15 |
17.8±4.2 |
9–28 |
| Others (undifferentiated) | 0(0%) | NA | NA | NA | NA | NA |
NB.: JIA Juvenile Idiopathic Arthritis, STD Standard Deviation, RF (−) Rheumatoid Factor negative, RF(+) Rheumatoid Factor Positive, NA Not applicable.