Specific Developmental Disabilities in U.S. Children Aged 3-17 Years (Centers for Disease Control and Prevention, National Center for Health Statistics, NHIS, 1997-2008).

Percent change between 1997-1999 and 2006-2008.

Any developmental disability: 17.1% (statistically significant values over four time periods: 1997-1999, 2000-2002, 2003-2005 and 2006-2008); ADHD: 33.0% (statistically significant values over four time periods: 1997-1999, 2000-2002, 2003-2005 and 2006-2008); Autism: 289.5% (statistically significant values over four time periods: 1997-1999, 2000-2002, 2003-2005 and 2006-2008); Blind/unable to see at all: 18.2%; Cerebral palsy: N/A; Moderate to profound hearing loss: -30.9%; Learning disability: 5.5%; Intellectual disability: -1.5%; Seizures, past 12 months; Stuttered or stammered, past 12 months: 3.1%; Other developmental delay: 24.7% (statistically significant trend over four time periods: 1997-1999, 2000-2002, 2003-2005 and 2006-2008).