Prevalence of self-reported chronic pain among adolescents: evidence from 42 countries and regions

HBSC survey (Health Behaviour in School-Aged Children) across 42 countries n>200,000. ~44% of adolescents report at least one chronic pain symptom weekly; ~25% report multisite pain. Higher in girls, in older adolescents, in low-SES families. Sets the public-health magnitude for paediatric chronic pain.