U.S. Teens in Our World: Understanding the Health of U.S. Youth in Comparison to Youth in Other Countries.

The Last Time You Were In A Physical Fight, With Whom Did You Fight?

The percent fighting with boyfriend/girlfriend, stranger, friend, family member, someone else, or more than one of these people in:

Republic of Ireland is 9.6% with a stranger, 16.7% with a family member, 1.2% with a boyfriend/girlfriend, 20.2% with a friend, 6% with someone else, and 2.7% with more than one
USA is 6.6% with a stranger, 9% with a family member, 2% with a boyfriend/girlfriend, 19.2% with a friend, 7.1% with someone else, and 4% with more than one
Israel is 7.7% with a stranger, 4.9% with a family member, 3.8% with a boyfriend/girlfriend, 11.4% with a friend, 8.2% with someone else, and 3.5% with more than one
Estonia is 6.6% with a stranger, 9.9% with a family member, 4.9% with a boyfriend/girlfriend, 7.3% with a friend, 5.1% with someone else, and 1% with more than one
Portugal is 6.6% with a stranger, 3.3% with a family member, 1.1% with a boyfriend/girlfriend, 13.2% with a friend, 3.7% with someone else, and 1.9% with more than one