Fig. 1. Frequency distribution of rhinitis in Korean children and adolescents. (A) The mean age of rhinitis patients is 6.7 (±3.4) at the time of presentation. The peak age is 5. The number of children who visit hospitals between ages 4 to 8 is higher than for other ages. (B) The number of patients with AR is higher than NAR at all ages. AR represents more than 70% of all cases ≥6 years. AR is also higher among those ≤1 year old. (C) Rhinitis patients visit mainly in the winter, and the peak month is January with fewer in the summer (June-August). (D) The percentage of patients with AR is higher than 50% regardless of season.