Relative contribution of race and ethnicity (R&E) vs Duffy to variance in ANC and WBC. Results from a linear regression analysis performed in AoU looking at the association of R&E and/or Duffy status as a predictor of WBC and ANC. The base model included age at median blood cell count, number of blood cell measurements taken, sex/gender, and 10 genetic PCs. Adjusted R² was used to account for the number of independent variables included in each model.