Very nice! The Canadian Longitudinal Study of Aging has longitudinal perceptions of race during spirometry encounters but not much on how people were treated. We recently reported crazy high discrepancies between perceived and self-identified race for many population groups.
doi.org/10.1183/1399...

Starting from a baseline reference population, we show racial gaps in lung function shrink as we sequentially exclude individuals with occupational dusts/fume exposure, inactivity, maternal/second-hand tobacco use, obesity, lack of home ownership and insurance, lower education, and unhealthy diet.