The health of children in the U.S. has “significantly worsened” over the past 17 years in a variety of areas, including deaths, chronic mental and physical illness, obesity, sleep health, activity levels and more.

American children’s health has declined profoundly over the past few decades, a new study shows, and the issues are so serious that children in the US are dying at a much higher rate than those in similar high-income countries.

A new study in the journal JAMA finds the health of America's children has worsened across several key indicators over the last two decades. That includes the number of children with chronic diseases.