Relationship between ultrasound parameters of the umbilical and middle cerebral arteries and intrauterine fetal distress

Table 2 Logistic regression correlation analysis of fetal umbilical artery and middle cerebral artery ultrasound blood flow parameters with intrauterine distress in umbilical cord bypass fetuses

Observation indicators	Wald	P value	OR	95%CI
UmA PI	8.837	0.004	3.248	1.448-12.308
RI	5.341	0.026	2.156	1.243-8.263
S/D	8.338	0.037	3.146	1.476-14.597
MCA PI	7.514	0.005	2.574	1.145-9.415
RI	10.241	0.000	2.983	1.341-11.374
S/D	10.719	0.000	3.217	1.517-12.372

MCA: Middle cerebral artery; UmA: Umbilical artery; RI: Resistance index; PI: Pulsatility index; S/D: Systolic maximal flow velocity of the umbilical artery compared to diastolic flow velocity.