Here is a scary piece of research that was just released: More than 1 in 7 American children have a mental, behavioral or developmental disorder, according to the U.S. Centers for Disease Control and Prevention, but prevalence is far from steady across the country. At the high end, 21.5% of kids in Arkansas and Kentucky have one of the conditions. By contrast, California logs the lowest rate in the nation at 10.6%. Parents were asked if they had every been told by a doctor or health care provider that their child had attention deficit hyperactivity disorder, depression, anxiety problems, behavioral problems such as oppositional defiant disorder or conduct disorder, Tourette syndrome, autism spectrum disorder, learning disability, intellectual disability, developmental delay, or speech or other language problems. Officials with the CDC say the findings have important implications for public health.