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Table 2 Case definition for ADHD

From: Validation of an EMR algorithm to measure the prevalence of ADHD in the Canadian Primary Care Sentinel Surveillance Network (CPCSSN)

Inclusion Criteria
individual is 4 years old or older; and
individual’s medical record includes ICD9 code in one or more in-person visits, on separate calendar days; and
individual’s medical record includes one or more prescriptions of ADHD-related medications;
Or
individual is 4 years old or older; and
individual’s medical record includes a relevant ICD9 code (314) on two or more in-person visits, on separate calendar days
Exclusion Criteria
Individual’s medical record includes one or more ICD9 codes corresponding to an exclusionary medical condition (see Additional file 1).