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Published on: June 23, 2014
Clinical, Immunological and Inflammatory Characteristics among Mexican Children with Different Subtypes of Juvenile
Hayde Guadalupe Hernández-Huirache1, Dagoberto Armenta-Medina2,3, Edel Rafael Rodea-Montero4,5
1Department of Pediatric Rheumatology, Hospital Regional de Alta Especialidad del Bajío, León 37544, Mexico.
Insights
Juvenile idiopathic arthritis (JIA) subtypes, particularly polyarticular forms, are more common in Mexican children. Elevated anti-CCP and RF levels may signal early adult rheumatoid arthritis, guiding JIA treatment decisions.
Area of Science:
- Pediatric Rheumatology
- Immunology
- Clinical Epidemiology
Background:
- Juvenile idiopathic arthritis (JIA) is the most prevalent chronic rheumatic condition in childhood.
- JIA affects 1-4 in 1000 children globally, characterized by joint inflammation over six weeks in those under 16.
- Understanding JIA subtype frequency and associated markers is crucial for effective management.
Purpose of the Study:
- To determine the frequency of JIA subtypes in Mexican pediatric patients.
- To compare clinical, immunological, and inflammation markers across different JIA subtypes.
- To investigate correlations between these variables in JIA patients.
Main Methods:
- A cross-sectional study involving 50 pediatric patients (2-15 years) diagnosed with JIA.
- Assessment of JIA subtype frequencies and immunological markers (Rheumatoid Factor, Anti-Nuclear Antibody, anti-cyclic citrullinated peptide antibodies).
- Statistical analysis included Kruskal-Wallis, chi-square tests, and Spearman correlation coefficients.
Main Results:
- Polyarticular subtypes (RF-seropositive and RF-seronegative) were most frequent (34% and 28%).
- Significant associations were found between sex and JIA subtype (p=0.014) and between JIA subtype and anti-CCP levels (p<0.001).
- Positive correlations were observed between RF and anti-CCP (r=0.63, p<0.001) and age and anti-CCP (r=0.29, p=0.041).
Conclusions:
- Mexican children exhibit a higher prevalence of polyarticular JIA subtypes compared to other populations.
- Anti-CCP and RF levels are significant markers in JIA, potentially indicating early rheumatoid arthritis.
- These immunological markers are important considerations for JIA treatment strategies.
Introduction:
Juvenile idiopathic arthritis (JIA) is the most common chronic rheumatic disease in childhood, affecting one to four of every 1000 children worldwide. It is characterized by joint inflammation lasting more than six weeks in children under 16 years. The aim of this study was to estimate the frequency of JIA subtypes in the Mexican patient population; compare clinical, immunological and inflammation markers by JIA subtype; and examine the correlation between these variables.
Methods:
We conducted a cross-sectional study of 50 patients with JIA (2-15 years). We estimated the frequency of each JIA subtype, assessed and compared the immunological characteristics (RF, ANA and anti-CCP) by JIA subtype at the time of diagnosis using Kruskal-Wallis or chi-square tests, and calculated Spearman correlation coefficients between the assessments.
Results:
Our analysis included 50 patients, 29 (58%) girls and 21 (42%) boys, aged at the time of diagnosis 10.56 ± 3.99 years. The frequencies of JIA subtypes were RF-seropositive polyarthritis (34%), RF-seronegative polyarthritis (28%), systemic arthritis (16%), oligoarthritis (14%) and arthritis-related enthesitis (8%). We found a significant association between sex and JIA subtype (p = 0.014). There was a significant difference in anti-CCP levels by JIA subtype (p < 0.001). We also detected positive correlations between RF and anti-CCP (r = 0.63, p < 0.001) and between age and anti-CCP (r = 0.29, p = 0.041).
Conclusions:
Our study suggests that the frequency of the polyarticular subtypes of JIA is higher in Mexican children compared to other populations. Our findings highlight the importance of considering the presence of anti-CCP and RF as important criteria when deciding on treatment for JIA patients as elevated levels of these antibodies may indicate early forms of adult rheumatoid arthritis.
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