Relative prediction accuracy (similar to c) from UKB of European ancestry alone or together with those from PAGE of mixed African ancestry for cross-ancestry prediction in the UKB population of African ancestry (n = 8 traits available). White blood cell in d is an outlier in UKB EUR + PAGE (relative improvement of 140.7%, 173.3%, 188.8%, 189.3%, 211.6% and 128.2% for each method/scenario), which is removed from the plot for a clear presentation. Each box plot shows the spread of data; the line is the middle (median), the box covers the middle half (IQR), the whiskers extend to 1.5 times the IQR, and dots show outliers. Data are provided in Supplementary Tables 4 – 6.
