Table 4. Estimated partial correlations relative to demographic parameters of breast diameter, subject age, and BMI, along with confidence intervals and P values for testing for a nonzero partial correlation.
| NIR property | Subject parameter | Partial correlation (95% confidence interval) | P |
|---|---|---|---|
| HbT | Diameter | -0.08 (-0.39, 0.24) | 0.64 |
| HbT | Age | -0.13 (-0.48, 0.21) | 0.46 |
| HbT | BMI | -0.43 (-0.81, -0.04) | 0.04 |
| StO2, % | Diameter | 0.21 (-0.24, 0.67) | 0.37 |
| StO2, % | Age | -0.46 (-0.92, -0.00) | 0.06 |
| StO2, % | BMI | -0.19 (-0.71, 0.33) | 0.48 |
| Water, % | Diameter | -0.43 (-0.88, 0.02) | 0.07 |
| Water, % | Age | 0.26 (-0.13, 0.65) | 0.20 |
| Water, % | BMI | -0.14 (-0.59, 0.31) | 0.56 |
| log(scatt. amp.) | Diameter | -0.40 (-0.77, -0.03) | 0.04 |
| log(scatt. amp.) | Age | -0.32 (-0.67, 0.03) | 0.09 |
| log(scatt. amp.) | BMI | 0.21 (-0.19, 0.62) | 0.31 |
| Scattering power | Diameter | -0.30 (-0.60, 0.00) | 0.07 |
| Scattering power | Age | -0.36 (-0.71, -0.01) | 0.05 |
| Scattering power | BMI | 0.18 (-0.20, 0.57) | 0.36 |
scatt. amp., scattering amplitude.
*P < 0.05 is considered to be significantly different from a slope of zero, indicating a partial correlation between property and demographic parameter.