Figure 1. Distribution of intussusception in males and females (A) surgical confirmed (positive) and unconfirmed (negative) after intussusception diagnosed with US (US positive), (B) surgical confirmed (positive) and unconfirmed (negative) after ultrasonography was negative for intussusception (US negative).

US pos: Ultrasound positive; US neg: Ultrasound negative; Surg pos: Surgery positive; Surg neg: Surgery negative