They have learned that ADHD runs in families. They found that over 25% of the first-degree relatives of the families of ADHD children also had ADHD, whereas this rate was only about 5% in each of the control groups. Therefore, if a child has ADHD there is a five-fold increase in the risk to other family members.
Cities, Towns and Communities. Moscow, with a population of 22,000, is the county seat and also the largest city in the county. The population of Moscow fluctuates as the University of Idaho population increases and decreases with the change of semesters and summer break. The other incorporated cities in Latah County include Genesee, Juliaetta, Kendrick, Troy, Deary, Bovill, Potlatch and Onaway.
Moscow is the largest city in Russia with a population of 12.1 million people, which also makes it the 11th largest city in the world. Saint Petersburg is the second largest Russian city, with 5.1 million people, making it the 50th largest city in the world.