Prevalence and persistence of stomach ache and headache among children. Follow‐up of a cohort of Norwegian children from 4 to 10 years of age

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Abstract
Results from a prospective cohort of 136 children, from 4 to 10 years of age, indicated that stomach ache was almost as prevalent among preschool children as children of school age. Headache was almost absent among 4-year-olds but prevalent at 10 years of age. Generally, early pain complaints were persistent. The co-occurrence of stomach ache and headache increased from 4% of children at 4 years of age to 20% when they reached 10 years of age.