Multiple linear regression of physical appearance traits on European and African ancestry.

Note: All regressions account for age, sex, country, education and wealth. Regressions for facial features (traits 13 to 18) also account for BMI and height. %R2 refers to trait variance explained by a regression model incorporating European and African ancestry (being proportions, European, African and American ancestries sum up to 1 and since in this sample African ancestry is very low (median of 7%), we use Native American ancestry as a baseline). %Δ R2 refers to the difference in variance explained by this full model and a model without ancestry as a predictor. P-Values −3 are shown in bold italic. The facial features (traits 13 to 18) refer to morphogeometric summaries of face variation derived from 3D landmark coordinates (see Methods). PC = Principal Components of the procrustes 3D landmark coordinates (% in parenthesis refer to variance explained by that PC).Multiple linear regression of physical appearance traits on European and African ancestry.