Illustration: Axios Visuals/Sarah Grillo

Roughly 25% of youths experience depression, anxiety, poor sleep and high stress due to "problematic smartphone use," according to new research published Friday in BMC Psychiatry.

Why it matters: The report says that how young people use smartphones — in ways that mimic behavioral addiction — could be more harmful for mental health than the phones themselves.

What they found: 17 to 19 year olds are the most frequent sufferers of problematic smartphone use, as found by over a dozen studies cited in the report, and those users said that social networking was the most important part of using a smartphone.

  • Loneliness and low self-esteem were also found to be associated with addictive or problematic smartphone use.
  • Both risk-taking and risk avoidant characteristics were associated with poor smartphone use — like low self-control, emotional instability, impulsivity, and perfectionism.

Methodology: The final report used 41 studies out of the 924 it analyzed, which included over 40,000 children and young people — an age range of those with a mean population of no greater than 25. Researchers used studies from 2011 to 2017 and no language restrictions were applied.

Go deeper: The growing war on tech addiction

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Ted Cruz defends GOP's expected return to prioritizing national debt

Sen. Ted Cruz (R-Texas) told "Axios on HBO" on Monday that he wishes reining in the national debt was a higher priority for President Trump.

Why it matters: Trump pledged during the 2016 campaign to reduce the national debt and eliminate it entirely within eight years, though he also deemed himself "the king of debt" and said there were some priorities that required spending. In the fiscal year that ended in September, the deficit reached a record $3.1 trillion.

Federal judge blocks DOJ from defending Trump in Carroll rape defamation case

E. Jean Carroll in Warwick, New York. Photo: Eva Deitch for The Washington Post via Getty Images

A federal judge on Tuesday dismissed the Justice Department's attempted intervention on behalf of President Trump in writer E. Jean Carroll's defamation lawsuit against him, after she accused him of raping her in a dressing room in the mid-1990s.

Catch up quick: The agency argued that Trump was "acting within the scope of his office" as president when he said in 2019 that Carroll was "lying" about her claim.

Updated 2 hours ago - Politics & Policy

Coronavirus dashboard

Illustration: Sarah Grillo/Axios

  1. Politics: Axios-Ipsos poll: Federal response has only gotten worse — The swing states where the pandemic is raging.
  2. Health: The coronavirus is starting to crush some hospitals — 13 states set single-day case records last week.
  3. Business: Where stimulus is needed most.
  4. Education: The dangerous instability of school re-openings.
  5. States: Nearly two dozen Minnesota COVID cases traced to 3 Trump campaign events.
  6. World: Unrest in Italy as restrictions grow across Europe.
  7. Media: Fox News president and several hosts advised to quarantine.