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. Author manuscript; available in PMC: 2011 Sep 1.
Published in final edited form as: Cancer Epidemiol Biomarkers Prev. 2010 Jul 20;19(9):2325–2331. doi: 10.1158/1055-9965.EPI-10-0482

Figure 2.

Figure 2

Effect of environmental vitamin D exposure (sunlight and diet) on serum 25(OH)D levels among African Americans, based on African ancestry category (grouped as low/medium and high).

* Low African ancestry defined as African ancestry <85%, Medium as 85%–94.99%, High as ≥95%.

† Effects were estimated from a linear regression model adjusted for age, gender, and body mass index and are relative to low vitamin D exposure. High vitamin D exposure was defined as UVR score above the median and dietary intake >400IU/day; medium exposure as UVR score above the median and dietary intake ≤400IU/day; low exposure as UVR score below the median.

(Among those with Low/Medium African ancestry, mean UVR scores and dietary intakes for referent, medium, and high exposure were 3.7 and 224 IUs, 6.9 and 93 IUs, and 6.9 and 526 IUs, respectively. Among those with High African ancestry, mean UVR scores and dietary intakes for referent, medium, and high exposure were 3.5 and 226 IUs, 6.9 and 96 IUs, and 6.6 and 560 IUs, respectively.)