Table 3.
Pulsatility indices by age, sex, race, in key vessel segments
| Pulsatility Index (Mean and Standard Error) | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| BA | VA | MCA | ACA | PCA | |||||
| (N= 292) | Left (N=301) |
Right (N=298) |
Left (N=268) |
Right (N=270) |
Left (N=255) |
Right (N=257) |
Left (N=256) |
Right (N=254) |
|
| Age Group | |||||||||
| 70–74 | 1.42 (0.04) | 1.29 (0.03) | 1.35 (0.03) | 1.55 (0.04) | 1.59 (0.04) | 1.61 (0.05) | 1.71 (0.05) | 1.60 (0.04) | 1.60 (0.04) |
| 75–79 | 1.40 (0.04) | 1.32 (0.03) | 1.39 (0.03) | 1.56 (0.03) | 1.62 (0.04) | 1.71 (0.04) | 1.72 (0.04) | 1.58 (0.04) | 1.61 (0.03) |
| 80–84 | 1.46 (0.04) | 1.37 (0.03) | 1.38 (0.04) | 1.61 (0.04) | 1.62 (0.04) | 1.71 (0.04) | 1.70 (0.04) | 1.63 (0.04) | 1.65 (0.04) |
| 85+ | 1.42 (0.05) | 1.33 (0.04) | 1.42 (0.05) | 1.66 (0.04) | 1.64 (0.04) | 1.73 (0.05) | 1.77 (0.04) | 1.64 (0.03) | 1.65 (0.03) |
| Pearson Correlation (p-value)* |
−0.002 (0.98) |
0.090 (0.12) | 0.033 (0.57) | 0.15 (.01) | 0.063 (0.31) | 0.15 (0.02) | 0.071 (0.26) | 0.074 (.24) | 0.084 (0.18) |
| Adjusted p-value† | 0.63 | 0.17 | 0.85 | 0.01 | 0.50 | 0.03 | 0.39 | 0.28 | 0.28 |
| Sex | |||||||||
| Men | 1.45 (0.04) | 1.33 (0.03) | 1.34 (0.03) | 1.51 (0.03) | 1.55 (0.03) | 1.59 (0.03) | 1.68 (0.04) | 1.55 (0.03) | 1.60 (0.03) |
| Women | 1.41 (0.03) | 1.33 (0.02) | 1.39 (0.02) | 1.64 (0.03) | 1.66 (0.03) | 1.75 (0.03) | 1.75 (0.03) | 1.65 (0.02) | 1.65 (0.02) |
| t-test p-value | 0.47 | 0.97 | 0.14 | 0.0008 | 0.008 | 0.0006 | 0.11 | 0.008 | 0.16 |
| Adjusted p-value† | 0.21 | 0.64 | 0.08 | 0.004 | 0.06 | 0.002 | 0.17 | 0.02 | 0.28 |
| Race | |||||||||
| White | 1.41 (0.03) | 1.32 (0.02) | 1.34 (0.02) | 1.56 (0.03) | 1.59 (0.03) | 1.68 (0.03) | 1.70 (0.03) | 1.59 (0.02) | 1.61 (0.02) |
| Black | 1.45 (0.04) | 1.33 (0.03) | 1.42 (0.02) | 1.61 (0.04) | 1.69 (0.04) | 1.71 (0.04) | 1.76 (0.04) | 1.65 (0.03) | 1.65 (0.03) |
| t-test p-value | 0.41 | 0.81 | 0.01 | 0.25 | 0.03 | 0.57 | 0.23 | 0.15 | 0.24 |
| Adjusted p-value† | 0.60 | 0.98 | 0.06 | 0.71 | 0.12 | 0.96 | 0.32 | 0.37 | 0.41 |
*
Pearson correlation coefficients for age as a continuous value (in years) with mean blood flow velocity
†
P-values from linear regression models that included age (years), sex, race-ethnicity (black/white), history of MI or revascularization, hypertension, and history of diabetes.