The reasons for this could be (1) the patients recruited were hospitalized, and the syndrome may be more severe in them in outpatients; (2) the patients enrolled in this study had elevated C-reactive protein or erythrocyte sedimentation rate, which may be an effective predictor for positive CE findings in patients with abdominal pain [33, 34]; and (3) minors involved in this study had a high incidence of Henoch-Schonlein purpura, which was not frequently found in adult patients. Here, CRP is linked to Henoch-Schoenlein purpura.