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How Does Race Correction Play Out in the Sprometer?
The sprometer works by comparing actual lung volume with expected lung volume. What is expected is calibrated by various metrics, including height, age and sex. And one of those metrics is race - black people have a 10-14% smaller lung capacity than their white counterparts. The same 3.5 litre volume if measured in an equivalent white man would be considered around 78% of the predicted lung volume. Two men of the same age and height, being treated differently, solely because of the colour of their skin.