Fig. 2
From: Characteristics of intussusception among children in Korea: a nationwide epidemiological study
Classification of comorbidities in patients treated for intussusception in Korea from 2008 to 2016 (P = 0.200). Group I: Structural problem of the gastrointestinal tract, Group II: Acute gastrointestinal infectious disease, Group III: Acute respiratory infectious disease, Group IV: Other infectious disease, Group V: Systemic non-infectious disease, Group VI: No accompanying disease