Odds ratios of BCC by quartile of plasma vitamin D concentrations in NHS and NHS II.

<p>Abbreviation: OR, odds ratio.</p>a<p>Adjusted for age at blood draw, season of blood draw, lab batch.</p>b<p>Adjusted for age at blood draw, season of blood draw, lab batch, hair color, burning tendency, numbers of sunburns.</p>c<p>Adjusted for age at blood draw, season of blood draw, lab batch, hair color, burning tendency, numbers of sunburns, UVB flux.</p>d<p>Adjusted for age at blood draw, season of blood draw, lab batch, cohort.</p>e<p>Adjusted for age at blood draw, season of blood draw, lab batch, cohort, hair color, burning tendency, numbers of sunburns.</p>f<p>Adjusted for age at blood draw, season of blood draw, lab batch, cohort, hair color, burning tendency, numbers of sunburns, UVB flux.