Table 2.
Simple and multiple linear regressions of the changes in prefrontal oxygenation, facial and hand skin blood flows, and MAP
| (1) Simple linear regression matrix between the variables (summary of correlation coefficients) | ||||||
|---|---|---|---|---|---|---|
| Right PFC | Left PFC | Forehead | Cheek | Hand | MAP | |
| Right PFC | 1.000 | |||||
| Left PFC | 0.995 | 1.000 | ||||
| Forehead | 0.817 | 0.799 | 1.000 | |||
| Cheek | 0.888 | 0.867 | 0.814 | 1.000 | ||
| Hand | 0.585 | 0.573 | 0.570 | 0.638 | 1.000 | |
| MAP | 0.562 | 0.560 | 0.454 | 0.509 | 0.158 | 1.000 |
| (2) Multiple linear regressions of the right PFC oxygenation from the changes in left PFC oxygenation, facial and hand skin blood flows, and MAP | ||||
|---|---|---|---|---|
| (a) Multiple linear regression equation | ||||
| Right PFC = −0.0396 + (1.053 × Left PFC) + (0.0570 × Forehead) + (0.144 × Cheek) + (0.00201 × Hand) + (0.00166 × MAP) | ||||
| (b) Multiple linear regression table | ||||
| Coefficient | SE | t | P | |
| Constant | −0.0396 | 0.00894 | −4.425 | <0.001 |
| Left PFC | 1.053 | 0.0144 | 73.046 | <0.001 |
| Forehead | 0.057 | 0.0187 | 3.052 | 0.003 |
| Cheek | 0.144 | 0.0218 | 6.628 | <0.001 |
| Hand | 0.00201 | 0.0510 | 0.0394 | 0.969 |
| MAP | 0.00166 | 0.00404 | 0.410 | 0.682 |
The dependent variable of right PFC can be predicted from a linear combination of the independent variables (left PFC, forehead, and cheek).
PFC, prefrontal cortex oxygenation; Forehead, forehead skin blood flow; Cheek, left cheek skin blood flow; Hand, right hand skin blood flow; MAP, mean arterial blood pressure.