“…Recently, children with ADHD were found to develop new anxiety disorders at a comparable rate to a sample of DSM-IIIR anxiety-disordered children (Last, Perrin, Hersen, & Kazdin, 1992), and to have high rates of co-morbid anxiety (Anderson, Williams, McGee, & Silva, 1987;McClellan, Rubert, Reichler, & Sylvester, 1990) and anxiety in their firstdegree relatives (Biederman, Faraone, Keenan, Knee, & Tsuang, 1990;Last, Hersen, Kazdin, Orvaschel, & Perrin, 1991). McClellan et al (1990) found an increased rate of ADHD in the offspring of panic disordered adults vs. depressed and normal adults.…”