Table 1.
Goodness of fit for three linear regression models with LDF flux as dependent variable and pial arteriolar diameter or RBC velocity or RBC flux as independent variable using average measures for 5-mmHg CPP bins.
| N Arterioles | Pial Arteriolar Diameter (Median) | Diameter R2 (Median) | RBC Velocity R2 (Median) | RBC Flux R2 (Median) | |
|---|---|---|---|---|---|
| Hypotension | 26 | 42 µm | 0.09 | 0.61 | 0.72 |
| Hypertension | 26 | 48 µm | 0.60 | 0.75 | 0.83 |
| All Combined | 52 | 45 µm | 0.34 | 0.71 | 0.81 |
The coefficient of determination (R2) is the proportion of variance in LDF flux that is explained by pial arteriolar diameter, RBC velocity or RBC flux.