National Trends in Pediatric Headache and Associated Functional Limitations.

Objective. Frequent or severe headaches are associated with school absenteeism and functional limitation in children, but trends in headache prevalence are uncertain. We used nationally representative data to describe trends in pediatric headache prevalence in the United States, and to evaluate whether headache has remained consistently associated with functional limitations among school-age children. Methods. We analyzed data on children age 5 to 17 years in the 2007 to 2015 National Health Interview Surveys. Caregivers reported whether each child experienced frequent or severe headache in the past 12 months. Weighted proportions and multivariable regression were used to estimate headache prevalence over the study period and associations between headache and measures of functional limitation. Results. The analysis included 57 272 children (mean age = 11 years; 52% female). Frequent or severe headache was reported for 6% of children, with no discernable trend over the study period. On multivariable Poisson regression, headache became more strongly associated with school absenteeism over time. In 2007, frequent or severe headache was associated with a 70% increase in the number of missed school days (incidence risk ratio [IRR] = 1.70; 95% confidence interval [CI] = 1.50-1.91; P < .001), whereas by 2015, headache was associated with a 139% increase in the number of missed school days (IRR = 2.39; 95% CI = 2.02-2.83; P < .001). Conclusion. Though the prevalence of frequent or severe headache in school-age children did not change in 2007 to 2015, headache became more strongly associated with school absenteeism, highlighting the need for improved management of patients with headaches to prevent negative impact on school performance and functional status.