Incidence and Prevalence of Juvenile Idiopathic Arthritis Among Children in a Managed Care Population, 1996-2009
Authors
Harrold, Leslie R.Salman, Craig
Shoor, Stanford
Curtis, Jeffrey R.
Asgari, Maryam M.
Gelfand, Joel M.
Wu, Jashin J.
Herrinton, Lisa J.
UMass Chan Affiliations
Department of Orthopedics and Physical RehabilitationDepartment of Medicine, Division of Rheumatology
Meyers Primary Care Institute
Document Type
Journal ArticlePublication Date
2013-07-01Keywords
Arthritis, Juvenile RheumatoidClinical Epidemiology
Health Services Research
Musculoskeletal Diseases
Metadata
Show full item recordAbstract
OBJECTIVE: Few studies based in well-defined North American populations have examined the occurrence of juvenile idiopathic arthritis (JIA), and none has been based in an ethnically diverse population. We used computerized healthcare information from the Kaiser Permanente Northern California membership to validate JIA diagnoses and estimate the incidence and prevalence of the disease in this well-characterized population. METHODS: We identified children aged /= 1 relevant International Classification of Diseases, 9th edition, diagnosis code of 696.0, 714, or 720 in computerized clinical encounter data during 1996-2009. In a random sample, we then reviewed the medical records to confirm the diagnosis and diagnosis date and to identify the best-performing case-finding algorithms. Finally, we used the case-finding algorithms to estimate the incidence rate and point prevalence of JIA. RESULTS: A diagnosis of JIA was confirmed in 69% of individuals with at least 1 relevant code. Forty-five percent were newly diagnosed during the study period. The age- and sex-standardized incidence rate of JIA per 100,000 person-years was 11.9 (95% CI 10.9-12.9). It was 16.4 (95% CI 14.6-18.1) in girls and 7.7 (95% CI 6.5-8.9) in boys. The peak incidence rate occurred in children aged 11-15 years. The prevalence of JIA per 100,000 persons was 44.7 (95% CI 39.1-50.2) on December 31, 2009. CONCLUSION: The incidence rate of JIA observed in the Kaiser Permanente population, 1996-2009, was similar to that reported in Rochester, Minnesota, USA, but 2 to 3 times higher than Canadian estimates.Source
J Rheumatol. 2013 Jul;40(7):1218-25. doi: 10.3899/jrheum.120661. Link to article on publisher's site
DOI
10.3899/jrheum.120661Permanent Link to this Item
http://hdl.handle.net/20.500.14038/37238PubMed ID
23588938Related Resources
Link to Article in PubMedae974a485f413a2113503eed53cd6c53
10.3899/jrheum.120661