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 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

Vasiliadis, Helen-Maria, Diallo, Fatoumata Binta, Rochette, Louis, Smith, Mark, Langille, Donald, Lin, Elizabeth, Kisely, Steve, Fombonne, Eric, Thompson, Angus H., Renaud, Johanne and Lesage, Alain (2017) 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 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. Canadian Journal of Psychiatry, 62 12: 818-826. doi:10.1177/0706743717714468


Author Vasiliadis, Helen-Maria
Diallo, Fatoumata Binta
Rochette, Louis
Smith, Mark
Langille, Donald
Lin, Elizabeth
Kisely, Steve
Fombonne, Eric
Thompson, Angus H.
Renaud, Johanne
Lesage, Alain
Title 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 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
Journal name Canadian Journal of Psychiatry   Check publisher's open access policy
ISSN 1497-0015
0706-7437
Publication date 2017-12-01
Year available 2017
Sub-type Article (original research)
DOI 10.1177/0706743717714468
Open Access Status Not yet assessed
Volume 62
Issue 12
Start page 818
End page 826
Total pages 9
Place of publication Thousand Oaks, CA., United States
Publisher Sage Publications
Language eng
Subject 2738 Psychiatry and Mental health
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.
Keyword ADHD
Data linkage
Diagnosis
Surveillance
Temporal trends
Q-Index Code C1
Q-Index Status Provisional Code
Grant ID 201104SEC
Institutional Status UQ

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Sub-type: Article (original research)
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Created: Sat, 16 Dec 2017, 20:05:50 EST