Table 3.

Comparison of the blood flow of middle cerebral artery between the two groups

Groups	Observation group (n=30)	Control group (n=60)	t	P
S/D	3.43±0.73	5.26±1.52	6.232	<0.001
RI	0.67±0.08	0.78±0.10	5.241	<0.001
PI	1.53±0.38	1.87±0.59	2.869	0.005

Note: S/D: systolic blood flow velocity to end-diastolic blood flow velocity; RI: resistance index; PI: pulsatility index.