June 16, 2011
Preschoolers who don't get enough sleep are more likely to be hyperactive and inattentive by the time they reach kindergarten.
Although Attention-Deficit Hyperactivity Disorder is typically not diagnosed before age five.
Study authors say the onset of symptoms often occurs earlier.
Researchers examined the sleeping patterns of nearly 6,900 kids based on their parents' opinion.
Parents were asked if their kids were inattentive, able to complete tasks easily, as well as if they had signs of hyperactivity.
Preschoolers whose parents said didn't sleep a lot tended to be less attentive and more hyperactive by the time they reached kindergarten.