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

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Abstract

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.

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Acknowledgments

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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Authors and Affiliations

  1. Department of Paediatrics, Royal University Hospital, University of Saskatchewan, 103 Hospital Drive, Saskatoon, SK, S7N 0C8, Canada

    Natalie Jane Shiff

  2. Department of Community Health Sciences, University of Manitoba, S113-750 Bannatyne Avenue, Winnipeg, MB, R3E 0W3, Canada

    Lisa M. Lix

  3. Department of Pediatrics and Child Health, University of Manitoba, RR149 Rehabilitation Centre 800 Sherbrook Street, Winnipeg, MB, R3A 1M4, Canada

    Kiem Oen

  4. Division of Clinical Epidemiology, Department of Epidemiology, Biostatistics and Occupational Health, Canada Research Institute of the McGill University Health Centre (MUHC), Royal Victoria Hospital, McGill University, V Pavillion, 687, Avenue des Pins Ouest, Montreal, QC, H3A 1A1, Canada

    Lawrence Joseph & Patrick Belisle

  5. Department of Pediatrics, Children’s Hospital of Eastern Ontario, University of Ottawa, 401 Smyth Rd, Rm 1420 Max Keeping Wing, Ottawa, ON, K1H 8L1, Canada

    Ciaran Duffy

  6. Department of Pediatrics, IWK Health Centre, Dalhousie University, 5850 University Avenue, Halifax, NS, B3K 6R8, Canada

    Elizabeth Stringer

  7. Division of Rheumatology, Department of Pediatrics, BC Children’s Hospital, University of British Columbia, 4480 Oak Street, Rm K4-120, Vancouver, BC, V6H 3V4, Canada

    Lori B. Tucker

  8. Alberta Health, Surveillance and Assessment Branch, Alberta Ministry of Health, 10025 Jasper Avenue, Edmonton, AB, T5J 1S6, Canada

    Lawrence W. Svenson

  9. School of Public Health, University of Alberta, Edmonton, AB, Canada

    Lawrence W. Svenson

  10. Department of Community Health Sciences, University of Calgary, Calgary, AB, Canada

    Lawrence W. Svenson

  11. Divisions of Rheumatology and Clinical Epidmemiology, McGill University, V Pavillion 687, Avenue des Pins Ouest, Montreal, QC, H3A 1A1, Canada

    Sasha Bernatsky

  12. Division of Clinical Epidemiology, Royal Victoria Hospital, Research Institute of the McGill University Health Centre (MUHC), V Pavillion 687, Avenue des Pins Ouest, Montreal, QC, H3A 1A1, Canada

    Sasha Bernatsky

Authors
  1. Natalie Jane Shiff
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  2. Lisa M. Lix
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  3. Kiem Oen
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  4. Lawrence Joseph
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  5. Ciaran Duffy
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  6. Elizabeth Stringer
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  7. Lori B. Tucker
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  8. Lawrence W. Svenson
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  9. Patrick Belisle
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  10. Sasha Bernatsky
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Corresponding author

Correspondence to Natalie Jane Shiff.

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Shiff, N.J., Lix, L.M., Oen, K. et al. Chronic inflammatory arthritis prevalence estimates for children and adolescents in three Canadian provinces. Rheumatol Int 35, 345–350 (2015). https://doi.org/10.1007/s00296-014-3085-0

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  • DOI: https://doi.org/10.1007/s00296-014-3085-0

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