Tendances temporelles de la prévalence et de l’incidence du TDAH diagnostiqué chez les enfants et les jeunes adultes entre 1999 et 2012 au Canada: une étude de couplage de données

Translated title of the contribution: Temporal Trends in the Prevalence and Incidence of Diagnosed ADHD in Children and Young Adults between 1999 and 2012 in Canada: A Data Linkage Study

Helen Maria Vasiliadis, Fatoumata Binta Diallo, Louis Rochette, Mark Smith, Donald Langille, Elizabeth Lin, Steve Kisely, Eric Fombonne, Angus H. Thompson, Johanne Renaud, Alain Lesage

Research output: Contribution to journalArticle

10 Scopus citations

Abstract

Objective: There is a need for the routine monitoring of treated attention-deficit hyperactivity disorder (ADHD) for timely policy making. The objective is to report and assess over a decade the prevalence and incidence of diagnosed ADHD in Canada. Methods: Administrative linked patient data from the provinces of Manitoba, Ontario, Quebec, and Nova Scotia were obtained from the same sources as the Canadian Chronic Diseases Surveillance Systems to assess the prevalence and incidence of a primary physician diagnosis of ADHD (ICD-9 and ICD-10 codes: 314, F90.x) for consultations in outpatient and inpatient settings (Med-Echo in Quebec, the Canadian Institute of Health Information Discharge Abstract Database in the 3 other provinces, plus the Ontario Mental Health Reporting System). Dates of service, diagnosis, and physician specialty were retained. The estimates were presented in yearly brackets between 1999-2000 and 2011-2012 by age and sex groups. Results: The prevalence of ADHD between 1999 and 2012 increased in all provinces and for all groups. The prevalence was approximately 3 times higher in boys than in girls, and the highest prevalence was observed in the 10- to 14-year age group. The incidence increased between 1999 and 2012 in Manitoba, Quebec, and Nova Scotia but remained stable in Ontario. Incident cases were more frequently diagnosed by general practitioners followed by either psychiatrists or paediatricians depending on the province. Conclusion: The prevalence and incidence of diagnosed ADHD did not increase similarly across all provinces in Canada between 1999 and 2012. Over half of cases were diagnosed by a general practitioner.

Translated title of the contributionTemporal Trends in the Prevalence and Incidence of Diagnosed ADHD in Children and Young Adults between 1999 and 2012 in Canada: A Data Linkage Study
Original languageFrench
Pages (from-to)818-826
Number of pages9
JournalCanadian Journal of Psychiatry
Volume62
Issue number12
DOIs
StatePublished - Dec 1 2017

Keywords

  • ADHD
  • data linkage
  • diagnosis
  • surveillance
  • temporal trends

ASJC Scopus subject areas

  • Psychiatry and Mental health

Fingerprint Dive into the research topics of 'Temporal Trends in the Prevalence and Incidence of Diagnosed ADHD in Children and Young Adults between 1999 and 2012 in Canada: A Data Linkage Study'. Together they form a unique fingerprint.

  • Cite this