Umbilical cord blood sample	Group						X² P
Umbilical cord blood sample	Severe		Moderate		Mild		X² P
Normal	1	9.1	21	91.3	39	97.5	48.380 0.001*
Acidaemia	10	90.9	2	8.7	1	2.5	48.380 0.001*
Total	11	100.0	23	100.0	40	100.0