UK:

Based on 2010 government census categories of nationality, ethnicity, and race.

There are some slight variation between the categories used between the England & Wales census, and the Scottish census. In order to characterise over time, we used a common denominator, which required a reduction of detail. We have condensed 18 government categories into 16 in Analyst.

US:

The federal government tracks several racial categories (White, Black or African American, Asian, etc.) but only two ethnic categories, Hispanic and Non-Hispanic. There may be some overlap between race and ethnicity unless the two characteristics are clearly separated, e.g., “White non-Hispanic,” “White Hispanic,” and “Non-white Hispanic.”