Relative to uninfected children, COVID-19 patients aged 8 to 17 years were at a 49% higher risk for new-onset depression or anxiety in 2021, rising to 59% in those with severe illness, according to a University of Utah study published this week in PLOS One.

The researchers mined the Utah All Payers Claims Database to explore the link between COVID-19 infection, illness severity, and risk of depression and anxiety among 154,565 school-aged youth who had private insurance or Medicaid coverage. The average participant age was 10.8 years in 2019, when the study period began, and 48% were girls.

Key contributors to mental illness among children include the pandemic’s direct impacts on daily life, such as school closures, isolation from peers, and disrupted family routines, the authors noted.