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Table 2 Prevalence of ADHD as a function of geographic region

From: Exposure to fluoridated water and attention deficit hyperactivity disorder prevalence among children and adolescents in the United States: an ecological association

  2003 2007 2011
Region Mean % SD Mean % SD Mean % SD
Northeast 7.92 1.13 9.46 0.97 10.96 1.72
Midwest 7.87 1.05 9.82 2.03 11.93 2.03
South 9.41 1.05 11.74 2.28 13.51 2.49
West 6.41 0.80 7.73 1.28 8.75 1.67
  1. Note. Mean percentage of children or adolescents ages 4–17 ever diagnosed with ADHD as of that year; SD, standard deviation. Northeast, n = 9, Midwest, n = 12.
  2. South, n = 17, West, n = 13.