Table 1 Vascular and blood flow changes in medial circumflex femoral artery in necrotic and healthy groups.

From: Clinical evaluation of blood flow in femoral head necrosis using color doppler ultrasound

Parameter

Necrosis group (52 hips)

Healthy group (57 hips)

Test value

p value

D (cm)

0.22 ± 0.03

0.22 ± 0.04

t = − 0.521

0.604

PSV (cm/s)

54.89 ± 26.30

75.31 ± 27.69

t = − 3.948

< 0.001

RI

0.88 ± 0.05

0.92 ± 0.06

t = − 3.041

0.003

PI

2.80 ± 0.86

33.22 ± 1.32

t = − 1.981

0.051