Incidence and prevalence of juvenile chronic arthritis: a population survey.

Abstract

Hospitals ofJonkoping, 3Vanersborg, 4Karlstad, 5Uddevalla, 6Boras, 7Molndal, and Skovde SUMMARY In a population based epidemiological survey of juvenile chronic arthritis (JCA), performed in Western Sweden in 1983, an incidence of 12/100 000 was found. The estimated prevalence was 56/100 000. Subgroup distribution showed a preponderance of mono-and pauciarticular forms. The peak age of onset was between 0 and 4 years of age. Girls predominated over boys in a ratio of 3:2. Overall, 30% were antinuclear antibody (ANA) positive, 9% rheumatoid factor (RF) positive, and eye involvement occurred in 10% of the children. The results suggest differences in population based studies of JCA compared with previously reported hospital based series.

Safety of measles, mumps and rubella vaccination in juvenile idiopathic arthritis

“…There was no increase in the number of JIA diagnoses made shortly after vaccination. The distribution of age at onset in our population is similar to that of a cohort of patients with JIA from Sweden, where children are vaccinated at 2–12 years of age 17. Finally, a decrease in incidence of JIA was observed in the decades after introduction of the routine MMR vaccination 18…”

Mandibular condyle lesions related to age at onset and subtypes of juvenile rheumatoid arthritis in 15‐year‐old children

“…The sex distribution was similarly consistent with earlier reports (2,21,24,25); that is, there were more girls with pauciarticular and polyarticular arthritis, while the sexes were equally represented in the systemic group. According to some reports, there are more girls in all subgroups of JRA (3,27,30), whereas the data of SCHALLER (23) and ANDERSSON GARE et al, (26) show more boys with systemic onset of the disease.…”

“…The distribution of the patients into JRA subgroups resembles that observed in many earlier reports (2, 21-28), pauciarticular onset being the largest subgroup and systemic onset the smallest, although there was a tendency, especially among the boys, for the pauciarticular mode of onset to predominate at the expense of the systemic and polyarticular modes. This agrees well with the Subgroup of !RA at changê auci-poly 'oly-pauci iystemic-pauci iystemic-poly (29), who also showed notable proportions of pauciarticular disease among Swedish (26) and Finnish (15,28,29) children and relatively few patients with systemic onset of JRA. The sex distribution was similarly consistent with earlier reports (2,21,24,25); that is, there were more girls with pauciarticular and polyarticular arthritis, while the sexes were equally represented in the systemic group.…”

Prevalence of musculoskeletal complaints and juvenile idiopathic arthritis in children from a developing country: a school‐based study

“…Data on incidence and prevalence of JIA are limited and majority of these epidemiology studies have been conducted on Caucasian children. The incidence of JIA ranges from 1 to 22 per 1 000 000 with a prevalence of 7–220 per 1 00 000 . Again, data from developing countries including India is scant.…”