Table 2 Color doppler ultrasound and blood flow index (based on Lee’s classification)
Variable | Lee’s classification (I-V) (n = 75a) | p value | ||||
|---|---|---|---|---|---|---|
I (n = 19) | II (n = 13) | III (n = 26) | IV (n = 14) | V (n = 3) | ||
Cortical thickness1ab (cm) | 1.5 ± 0.3 | 1.5 ± 0.2 | 1.5 ± 0.2 | 1.6 ± 0.3 | 1.5 ± 0.2 | 0.40 |
Cortical thickness2bc (cm) | 1.7 ± 0.6 | 1.5 ± 0.3 | 1.5 ± 0.3 | 1.5 ± 0.3 | 1.3 ± 0.2 | 0.59 |
Change in cortical thicknesscd (cm) | −0.1 ± 0.6 | 0.1 ± 0.4 | 0 ± 0.2 | 0.1 ± 0.3 | 0.2 ± 0.1 | 0.23 |
Echo enhancement (%) | 2 (10.5) | 1 (7.7) | 2 (7.7) | 8 (57.1) | 2 (66.7) | < 0.01 |
Blood flow distribution1 (I-V) | 4.9 ± 0.3 | 4.8 ± 0.4 | 4.9 ± 0.3 | 4.9 ± 0.4 | 5.0 ± 0 | 0.96 |
Blood flow distribution2 (I-V) | 4.8 ± 0.4 | 4.6 ± 0.6 | 4.7 ± 0.5 | 4.4 ± 0.7 | 3.7 ± 1.1 | 0.06 |
Change in blood flow distribution (I-V) | 0.5 ± 0.2 | 0.2 ± 0.4 | 0.1 ± 0.4 | 0.5 ± 0.8 | 1.3 ± 1.1 | 0.02 |
MRA | Â | |||||
 Vs1 (cm/s) | 91.7 ± 20.0 | 109.4 ± 46.6 | 102.1 ± 26.8 | 100.1 ± 30.7 | 133.6 ± 45.7 | 0.31 |
 Vs2 (cm/s) | 104.6 ± 54.1 | 114.8 ± 48.3 | 117.2 ± 49.1 | 82.2 ± 32.1 | 95.4 ± 35.2 | 0.20 |
 Vs1- Vs2 (cm/s) | −12.9 ± 61.1 | −5.4 ± 26.7 | −15.1 ± 51.4 | 17.9 ± 24.6 | 38.3 ± 10.5 | 0.04 |
 RI1 | 0.6 ± 0.1 | 0.7 ± 0.1 | 0.7 ± 0.1 | 0.7 ± 0.1 | 0.6 ± 0 | 0.80 |
 RI2 | 0.7 ± 0.1 | 0.7 ± 0.1 | 0.7 ± 0.1 | 0.7 ± 0.1 | 0.7 ± 0 | 0.36 |
 RI1/RI2 | 1.0 ± 0.2 | 1.0 ± 0.1 | 1.0 ± 0.1 | 0.9 ± 0.1 | 0.9 ± 0.1 | 0.15 |
SRA | ||||||
 Vs1 (cm/s) | 54.2 ± 17.4 | 59.0 ± 18.1 | 55.3 ± 14.7 | 61.6 ± 19.0 | 81.3 ± 2.1 | 0.14 |
 Vs2 (cm/s) | 53.1 ± 15.1 | 60.6 ± 18.8 | 56.6 ± 13.0 | 52.4 ± 21.4 | 45.5 ± 3.5 | 0.38 |
 Vs1- Vs2 (cm/s) | 1.1 ± 20.8 | −1.6 ± 12.6 | −1.3 ± 17.7 | 9.1 ± 23.6 | 35.8 ± 5.3 | 0.05 |
 RI1 | 0.6 ± 0.1 | 0.6 ± 0.1 | 0.6 ± 0.1 | 0.6 ± 0.1 | 0.6 ± 0.1 | 0.66 |
 RI2 | 0.6 ± 0.1 | 0.6 ± 0 | 0.6 ± 0.1 | 0.7 ± 0.1 | 0.7 ± 0.1 | 0.15 |
 RI1/RI2 | 1.0 ± 0.1 | 1.0 ± 0.1 | 1.0 ± 0.1 | 0.9 ± 0.1 | 0.9 ± 0.1 | 0.18 |
IRA | ||||||
 Vs1 (cm/s) | 29.4 ± 8.0 | 34.5 ± 9.1 | 31.2 ± 8.0 | 34.2 ± 9.1 | 37.4 ± 10.7 | 0.26 |
 Vs2 (cm/s) | 31.2 ± 10.3 | 34.5 ± 7.5 | 32.7 ± 8.5 | 28.6 ± 10.9 | 28.5 ± 10.5 | 0.42 |
 Vs1- Vs2 (cm/s) | −1.8 ± 11.4 | 0 ± 9.3 | −1.5 ± 10.2 | 5.6 ± 9.3 | 8.8 ± 8.3 | 0.10 |
 RI1 | 0.6 ± 0.1 | 0.6 ± 0.1 | 0.6 ± 0.1 | 0.6 ± 0 | 0.6 ± 0 | 0.92 |
 RI2 | 0.6 ± 0.1 | 0.6 ± 0.1 | 0.6 ± 0.1 | 0.6 ± 0.1 | 0.7 ± 0 | 0.11 |
RI1/RI2 | 1.0 ± 0.2 | 1.0 ± 0.1 | 1.0 ± 0.1 | 0.9 ± 0.1 | 0.9 ± 0 | 0.08 |
ARA | ||||||
 Vs1 (cm/s) | 20.8 ± 6.7 | 21.6 ± 4.4 | 19.7 ± 5.3 | 25.3 ± 7.2 | 27.4 ± 6.2 | 0.07 |
 Vs2 (cm/s) | 20.2 ± 8.0 | 22.1 ± 8.2 | 20.9 ± 9.5 | 18.9 ± 8.0 | 19.6 ± 4.5 | 0.79 |
 Vs1- Vs2 (cm/s) | 0.6 ± 7.3 | −0.5 ± 9.3 | −1.2 ± 13.0 | 6.4 ± 9.1 | 7.8 ± 1.8 | 0.07 |
 RI1 | 0.6 ± 0 | 0.6 ± 0 | 0.6 ± 0.1 | 0.6 ± 0 | 0.6 ± 0 | 0.85 |
 RI2 | 0.6 ± 0.1 | 0.6 ± 0.1 | 0.6 ± 0.1 | 0.6 ± 0.1 | 0.7 ± 0.1 | 0.04 |
 RI1/RI2 | 1.0 ± 0.1 | 1.0 ± 0.1 | 1.1 ± 0.2 | 1.0 ± 0.1 | 0.9 ± 0 | 0.04 |