A study examining the impact the pandemic has had on pediatric mental health found a more than 300% increase in intentional self-harm claims among teenagers in the Northeast.

“Comparing August 2019 to August 2020 in the Northeast, for the age group 13-18, there was a 333.93 percent increase in intentional self-harm claim lines as a percentage of all medical claim lines, a rate higher than that in any other region in any month studied for that age group,” FAIR Health, a nonprofit group that gathers information for the largest database of privately billed health insurance claims, reported in a white paper published Tuesday.