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Table 3 Prevalence of ADHD, by age

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

Year Age Group
% of patients (95% CI)
4–17 18–34 35–64
2008 6.92 (5.62, 8.39) 5.73 (4.40, 7.23) 5.20 (3.87, 6.73)
2009 6.99 (5.69, 8.49) 5.88 (4.57, 7.36) 5.22 (3.93, 6.74)
2010 7.35 (6.08, 8.81) 6.07 (4.76, 7.56) 5.27 (3.95, 6.75)
2011 7.63 (6.36, 9.08) 6.24 (5.00, 7.77) 5.32 (4.02, 6.81)
2012 7.87 (6.61, 9.37) 6.48 (5.18, 7.98) 5.36 (4.03, 6.89)
2013 8.14 (6.89, 9.60) 6.74 (5.45, 8.23) 5.43 (4.12, 6.93)
2014 8.40 (7.13, 9.86) 7.05 (5.74, 8.52) 5.48 (4.17, 7.00)
2015 8.57 (7.32, 10.00) 7.33 (6.04, 8.78) 5.54 (4.22, 7.02)
  1. CI Confidence interval