The prevalence of very frequent physical fighting among boys and girls in 27 countries and cities: regional and gender differences.

Objective: Using nationally representative data, this study examined the prevalence of very frequent physical fighting (≥12 times per year) among youth in 27 countries and cities. Frequent physical fighting has rarely been reported in the previous literature despite the implications for research and practice.

Methods: Analyses were based on the Global School-based Student Health Survey (2003-2008) and the 2009 US Youth Risk Behavior Survey.