Table 3. Meta-regression analysis of pooled data of all 65 study subsets using a random effect model.
| Co-variable | Type of variable | Categories | p-value |
|---|---|---|---|
| Field strength (T) | Dichotomous | 1.5 or 3.0 Tesla | 0.045 |
| Lowest b-value (s/mm2) | Dichotomous | 0 or 50 s/mm2 | 0.288 |
| Image of BTTS drawing | Dichotomous | Only ADC or DWI vs. ADC or DWI with reference to DCE | 0.945 |
| DWI pre or post contrast | Dichotomous | Pre- or post-contrast | 0.326 |
| Slice thickness (mm) | Continuous | 0.762 | |
| ADC Threshold (mm2/s) | Continuous | 0.429 |
ADC = apparent diffusion coefficient, DWI = diffusion weighted imaging, DCE = dynamic contrast enhanced, BTTS = breast tumor tissue selection and T = Tesla.