Y=7.68 X-1.75, R2=0.86, P<0.001 in the correlation of A/B ratio (X) and 1min Apgar score (Y). If Y is 5 min Apgar score, Y=6.71 X-0.35, R2=0.74, p<0.01.
Figure 9: Close correlation of fetal A/B ratio (X) and 1 min Apgar score (Y) [12]. Apgar 6-4 is mild to moderate neonatal asphyxia and Apgar 3-0 is severe asphyxia.