Two important reports regarding ADHD in kids came out in recent days, including a Mayo Clinic study that found a high number of hyperactive children who also had writing problems.

Dr. Kouichi Yoshimasu and Mayo colleagues studied 5,718 children born between 1976 and 1982 and raised in the Rochester area and found the rate of written-language disorder to be much higher in kids with ADHD. Researchers said the study, released Monday in the journal Pediatrics, underscores the need to screen kids with ADHD for reading disorders.

On Friday, the federal government said the share of children diagnosed with ADHD has jumped 30 percent in the past decade, to 9 percent of U.S. kids.