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. Author manuscript; available in PMC: 2011 Jul 22.
Published in final edited form as: N Engl J Med. 2010 Jul 7;363(4):321–330. doi: 10.1056/NEJMoa0907897

Figure 1. Ancestry, Forced Expiratory Volume in 1 Second (FEV1), and Differences in Predicted FEV1 among CARDIA Study Participants.

Figure 1

The percentage of African ancestry, as estimated by means of genetic markers, in men and women who identified themselves as African American is shown in Panels A and B, respectively. The relation between African ancestry and FEV1 (indicated as a solid curve, with 95% confidence intervals as dashed curves) is also shown for men and women, in Panels C and D, respectively. The extent and distribution of the differences in predicted FEV1 between the ancestry-based models and the standard race-based models (not including ancestry) in men and women are shown in Panels E and F, respectively.