Clinical features of children with juvenile idiopathic arthritis using the ILAR classification criteria: A community-based cohort study in Taiwan

Abstract

Compared with previous reports on Western populations, a remarkably high prevalence was found in the ERA of the Chinese cohort, but a relatively low rate of uveitis. Ongoing disease activity was evident in a substantial number of children. These results provided a good starting point in understanding the epidemiology of this serious disease in the Chinese population.

Subtype frequencies, demographic features, and remission rates in juvenile idiopathic arthritis - 265 cases from a Turkish center

“…The ratio of extended oligoarthritis patients in our cohort (6.8%) is less than the literature. Kunjir et al 8 reported that 20.4% of oligoarthritis patients were extended oligoarthritis, and this ratio was 28.9% in the study of Shen et al 9 A nationwide study done in Turkish children found that the ratio of extended oligoarthritis was 10%, that is close to our study and less frequent as compared to the literature. 11 This finding may be attributed to relatively small sample size in our total cohort.…”

“…1 It was observed that while oligoarthritis is the most common subtype in Europe and North America, enthesitis related arthritis is the most common subtype in Asia and Middle Eastern countries. 1,6,7,8,9 The cause and pathogenesis of JIA is still unclear and it is thought that the pathogenesis of each subtype is multifactorial and possibly triggered by environmental stimuli in a genetically susceptible host. Geographical differences in JIA subtype frequencies seem to be supporting this idea and many studies are focusing on the interactions between immune system and microbiome of the gut.…”

“…RF-positive polyarthritis, psoriatic arthritis, and undifferentiated arthritis are the least common subtypes in all ethnic groups and systemic arthritis and RF-negative polyarthritis stand with intermediate frequency. [6][7][8][9] All patients in the cohort were classified by the current ILAR system. 2 ILAR classification system was first described in 1994 and the last update was in 2001.…”

The pattern of juvenile idiopathic arthritis; a retrospective Egyptian study

“…Meanwhile, age was lower than that reported by Ruperto et al 18 (8±3yr) and a cohort study at Taiwan (9.1y). 19 Also, the current study reported that most of the cases were from rural areas similar to Quartier et al 10 and Abu elsoud et al 16 Family history of JIA showed high frequency among patients like other studies. 15,20 On contrary, to many studies the numbers of male patients were higher than the females.…”

Unraveling the Phenotypic Variability of Juvenile Idiopathic Arthritis across Races or Geographic Areas — Key to Understanding Etiology and Genetic Factors?

“…Over the past 3 decades, several epidemiologic surveys have documented a remarkable, yet unexplained, disparity in the prevalence of JIA subtypes among different geographic areas or racial/ethnic groups 5,6,7,8,9,10,11,12,13 . In Western countries, the most common category is oligoarthritis, but this form is rare in India, New Zealand, The Middle East, and South Africa, where polyarthritis predominates.…”