Table 3 Differences in blood flow parameters between non-collapse and collapse groups in femoral head necrosis.

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

Parameter

Non-collapse group (26 hips)

Collapse group (26 hips)

Test value

p value

D (cm)

0.22 ± 0.03

0.21 ± 0.03

t = − 1.972

0.054

PSV (cm/s)

62.54 ± 19.80

47.24 ± 29.95

t = − 2.172

0.035

RI

0.90 ± 0.05

0.87 ± 0.05

t = − 2.473

0.017

PI

3.11 ± 0.82

2.48 ± 0.78

t = − 2.782

0.008

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