表 1. Disease profile comparison of neonates between the IC-ECG group and the control group.

IC-ECG组与对照组患儿疾病类型比较

Group	n	Diseases/case (%)
		Premature	Asphyxia	HIE	Pneumonia	RDS	NEC
IC-ECG: Intracavitary electrocardiogram; HIE: Hypoxic-ischemic encephalopathy; RDS: Respiratory distress syndrome; NEC: Necrotizing enterocolitis.
Control	105	62 (59.0)	29 (27.6)	3 (2.9)	58 (55.2)	52 (49.5)	9 (8.6)
IC-ECG	105	65 (61.9)	25 (23.8)	4 (3.8)	63 (60.0)	46 (43.8)	7 (6.7)
χ 2		0.179	0.399	0.000	0.488	0.689	0.271
P		0.778	0.636	1.000	0.577	0.489	0.796