Abstract
INTRODUCTION: Data from the 2024 National Health Interview Survey (NHIS) were analyzed to provide estimates of diagnosed seasonal allergy, eczema, and food allergy by age, sex, and urbanization level. METHODS: Point estimates and the corresponding confidence intervals for this analysis were calculated using SAS-callable SUDAAN software to account for the complex sample design of NHIS. Differences between percentages were evaluated using two-sided significance tests at the 0.05 level. Linear and quadratic trends by age were evaluated using orthogonal polynomials. KEY FINDINGS: In 2024, diagnosed seasonal allergies (20.6%) were the most common allergies in children, followed by diagnosed eczema (12.7%), and then diagnosed food allergies (5.3%). Children living in nonmetropolitan areas (25.6%) were more likely to have a diagnosed seasonal allergy compared with children living in metropolitan areas (19.8%). The percentage of children with diagnosed eczema was similar in boys (12.2%) and girls (13.3%). The percentage of children with a diagnosed food allergy increased with age, from 3.9% in children ages 0-5 years to 6.9% in children ages 12-17 years.