Welland (2011 population 50,631) is a city in the Regional Municipality of Niagara in Southern Ontario, Canada. The city is located in the centre of Niagara.
More than 5 million U.S. children, or 9.5 percent, have been diagnosed with ADHD as of 2007, according to the U.S. Centers for Disease Control and Prevention. Kids with the condition may act more impulsively, and have difficulty paying attention and controlling their behavior.
Children with ADHD. 1  On average, every classroom of 30 students has 1 to 3 children with ADHD. 2  Three boys are diagnosed for every one girl. 3  The average age of onset is 5 for severe ADHD, 7 for moderate symptoms, and 8 for mild symptoms. 4  About half of kids with ADHD are noted to have âsevere impairment.â.