Values of coefficients and constants obtained by univariate linear regression analysis (y = ax + b) to predict nonimaging transcranial Doppler sonographic (TCD) velocities based on angle-corrected imaging transcranial Doppler sonographic (TCDI) velocities and TCDI velocities without angle correction in major cerebral arteries of children with sickle cell disease
| Artery | Angle-Corrected TCDI Velocities | TCDI Velocities | ||||||
|---|---|---|---|---|---|---|---|---|
| a | b | F | R | a | b | F | R | |
| MCA Right | 0.43 | 76 | 17.0 | 0.33 | 0.61 | 65 | 35.4 | 0.51 |
| MCA Left | 0.62 | 51 | 43.0 | 0.57 | 0.64 | 63 | 55.9 | 0.63 |
| ICA Right | 0.21 | 93 | 7.1 | 0.17 | 0.34 | 86 | 2.6 | 0.07 |
| ICA Left | 0.38 | 72 | 18.5 | 0.35 | 0.39 | 81 | 9.5 | 0.22 |
| ACA Right | 0.01 | 104 | 0.0 | 0.00 | 0.24 | 87 | 2.1 | 0.06 |
| ACA Left | 0.35 | 64 | 6.8 | 0.18 | 0.50 | 61 | 5.8 | 0.15 |
| PCA Right | 0.54 | 38 | 54.2 | 0.63 | 0.53 | 50 | 22.0 | 0.40 |
| PCA Left | 0.35 | 59 | 13.7 | 0.32 | 0.52 | 51 | 11.5 | 0.28 |
Note:—a indicates coefficient; b, constant; F, F ratio; R, R square for a model; ICA, internal carotid artery; MCA, middle cerebral artery; ACA, anterior cerebral artery; PCA, posterior cerebral artery.