Attention-deficit/hyperactivity disorder (ADHD) is now known to continue into adulthood for many children diagnosed with ADHD. Estimates of persistence reach up to 75% (Biederman, Petty, Clarke, Lomedico, & Faraone, 2011) in some studies. For example, in the Milwaukee longitudinal study of hyperactive children to age 27, 56% had symptoms of ADHD that were two standard deviations above the control group mean (Barkley, Murphy, & Fischer, 2008). Four or more symptoms of ADHD were experienced by 58% of the young adults with childhood ADHD who were followed by Biederman and colleagues (Biederman, Monuteaux, Mick, Spencer et al., 2006). Similarly, Weiss and Hechtman (1993) found clinically elevated ADHD symptoms in 66% of young adults diagnosed with ADHD in childhood. Impairment from ADHD reaches into adult-relevant domains of functioning that cut across educational (Mannuzza, Klein, Bessler, Malloy, & Hynes, 1997), vocational (Kuriyan et al., 2013), social (Friedman et al., 2003), legal (Mannuzza, Klein, & Moulton, 2008), and health-related (Flory, Molina, Pelham, Gnagy, & Smith, 2006) domains of life. These estimates of persistence roughly comport with the prevalence rate of 4.4% for adult ADHD reported by Kessler and colleagues (2006) from the National Comorbidity Survey (Kessler & Merikangas, 2004). We expect that this figure for adults may rise due to several converging trends. First, the results of a national survey recently revealed that 11% of children and adolescents in the United States receive a diagnosis of ADHD at some time in their lives (Visser et al., 2014). Although only 6.1% are being treated at any one point in time, these figures represent a 42% increase in rates of diagnosis in the last eight years (Visser et al., 2014). Prescriptions for the most common pharmacologic treatment of ADHD, central nervous system stimulants, have increased 25% for adolescents and 53% for adults in the past four years (Express Scripts, 2014; Visser et al., 2014). Finally, the continuing rise in abuse and diversion of stimulant prescriptions that has been occurring across college campuses in recent years (McCabe, West, Teter, & Boyd, 2014) and widespread Internet-based tips for “faking ADHD” (http://exiledonline. com/adderall-tips-how-to-convinceyour-shrink-you-have-addadhd) suggest that growing numbers of adults with ADHD may be attempting to procure prescriptions without legitimate medical need. Taken together, these statistics clearly point to an increasing
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