Head Circumference Charts for Turkish Children Aged Five to Eighteen Years

Introduction: Most head circumference growth references are useful during the first years of life, but they are also useful for older children when screening for developmental, neurological, and genetic disorders. We aimed to develop head circumference growth reference charts for age, height, and waist circumference for Turkish children aged 5-18 years. Methods: Head circumference, height, and waist circumference measurements were obtained from 5079 students aged 5-18 years from Izmit, Kocaeli Province, Turkey. The LMS method was used to construct reference centile curves. Results: Head circumference measurements were strongly correlated with height (r=0.74), weight (r=0.76), and waist circumference (r=0.68). The mean head circumference values for boys were larger than those for girls at all ages. Compared with data from the United States, the World Health Organization, and other studies from Turkey, our data showed a decrease in head circumference at all ages for both sexes. Conclusion: Local growth charts can be used to evaluate head circumference growth in older Turkish children and adolescents.