Fig. 1From: Clinical characteristics of headache in Italian adolescents aged 11–16 years: a cross-sectional questionnaire school-based studyMean age at headache onset (left) and gender differences in age at headache onset (right). The age distribution at headache onset shows two peaks in peri-pubertal age, at 8 and 10 years, with a mean age at onset of 8.3 years and an overall increase during adolescence. Girls show a moderate tendency for older age at onset, without reaching statistical significanceBack to article page