Rheumatology International

, Volume 35, Issue 2, pp 345–350 | Cite as

Chronic inflammatory arthritis prevalence estimates for children and adolescents in three Canadian provinces

  • Natalie Jane ShiffEmail author
  • Lisa M. Lix
  • Kiem Oen
  • Lawrence Joseph
  • Ciaran Duffy
  • Elizabeth Stringer
  • Lori B. Tucker
  • Lawrence W. Svenson
  • Patrick Belisle
  • Sasha Bernatsky
Original Article


There is a paucity of published population-based estimates of the prevalence of chronic inflammatory arthritis in the pediatric population. We used administrative health data to estimate the prevalence of chronic inflammatory arthritis in individuals ≤18 years in three Canadian provinces: Quebec, Manitoba, and Saskatchewan. Cases aged ≤18 years were identified by meeting any one of the following criteria: (a) ≥1 hospital discharge abstract with an ICD-9 code of 714 or ICD-10-CA codes of M05, M06 or M08, or (b) ≥2 ICD-9 714 billing codes ≥8 weeks apart, but within 2 years, or (c) ≥1 ICD-9 714 billing code by a rheumatologist. Crude prevalence estimates per 10,000 population were estimated with 95 % confidence intervals (CIs). Prevalence estimates were 11.7 per 10,000 individuals ≤18 years of age in Manitoba, 9.8 per 10,000 in Saskatchewan, and 8.0 per 10,000 in Quebec. In pairwise comparisons of rate differences, Manitoba and Saskatchewan had higher estimates than Quebec. Prevalence estimates were higher for females than males, with a difference of 5.9 cases per 10,000 residents (95 % CI 5.1, 6.7). Saskatchewan was the only province with a higher estimate in urban compared to rural residents (5.2, 95 % CI 2.5, 8.0). Variations in provincial estimates may be due to differences in underlying population characteristics. Although these estimates have face validity and are in keeping with the range of previously published pediatric prevalence estimates, studies to establish the empiric validity of case-finding algorithms are needed to advance research in pediatric chronic disease epidemiology.


Prevalence Epidemiology Juvenile rheumatoid arthritis Arthritis Pediatrics Administrative databases 



This study is based in part on de-identified data provided by the Saskatchewan Ministry of Health. The interpretation and conclusions contained herein do not necessarily represent those of the Government of Saskatchewan or the Ministry of Health. The authors are also indebted to Manitoba Health for the provision of data. The results and conclusions are those of the authors, and no official endorsement by Manitoba Health is intended or should be inferred.

Conflict of interest

None of the authors have competing interests.


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Copyright information

© Springer-Verlag Berlin Heidelberg 2014

Authors and Affiliations

  • Natalie Jane Shiff
    • 1
    Email author
  • Lisa M. Lix
    • 2
  • Kiem Oen
    • 3
  • Lawrence Joseph
    • 4
  • Ciaran Duffy
    • 5
  • Elizabeth Stringer
    • 6
  • Lori B. Tucker
    • 7
  • Lawrence W. Svenson
    • 8
    • 9
    • 10
  • Patrick Belisle
    • 4
  • Sasha Bernatsky
    • 11
    • 12
  1. 1.Department of Paediatrics, Royal University HospitalUniversity of SaskatchewanSaskatoonCanada
  2. 2.Department of Community Health SciencesUniversity of ManitobaWinnipegCanada
  3. 3.Department of Pediatrics and Child HealthUniversity of ManitobaWinnipegCanada
  4. 4.Division of Clinical Epidemiology, Department of Epidemiology, Biostatistics and Occupational Health, Canada Research Institute of the McGill University Health Centre (MUHC), Royal Victoria HospitalMcGill UniversityMontrealCanada
  5. 5.Department of Pediatrics, Children’s Hospital of Eastern OntarioUniversity of OttawaOttawaCanada
  6. 6.Department of Pediatrics, IWK Health CentreDalhousie UniversityHalifaxCanada
  7. 7.Division of Rheumatology, Department of Pediatrics, BC Children’s HospitalUniversity of British ColumbiaVancouverCanada
  8. 8.Alberta Health, Surveillance and Assessment BranchAlberta Ministry of HealthEdmontonCanada
  9. 9.School of Public HealthUniversity of AlbertaEdmontonCanada
  10. 10.Department of Community Health SciencesUniversity of CalgaryCalgaryCanada
  11. 11.Divisions of Rheumatology and Clinical EpidmemiologyMcGill UniversityMontrealCanada
  12. 12.Division of Clinical Epidemiology, Royal Victoria HospitalResearch Institute of the McGill University Health Centre (MUHC)MontrealCanada

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