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. Author manuscript; available in PMC: 2016 Oct 1.
Published in final edited form as: JAMA Intern Med. 2015 Oct 1;175(10):1612–1621. doi: 10.1001/jamainternmed.2015.3874

Figure 2. Serum Vitamin D Levels by Treatment Assignment.

Figure 2

Serum vitamin D levels were summarized using the mean and standard deviation, and compared across treatment arms by analysis of variance, with correction of p-values to control the false discovery rate using the Benjamini and Hochberg method. Vitamin D levels were not significantly different across treatment groups at the screening (p=0.89) and randomization (p=0.89) visits. At all subsequent visits, serum vitamin D levels were significantly different (p<0.001) across all three treatment arms. Pairwise comparisons likewise showed p-values <0.001. To convert 25(OH)D from ng/mL to mmol/L, multiply values by 2.496.