Fig. 1

Timeframe for data extraction. Patients who met all the following conditions were enrolled in this study: (1) diagnosed with an upper respiratory tract infection (URI) during the survey period; (2) aged < 15 years in the month of diagnosis; (3) pediatrician claimed an initial visit fee in the month of diagnosis; (4) diagnosed with a different condition within 3 months prior to the diagnosis of the URI and not hospitalized (Lookback*).URI: upper respiratory tract infection