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. 2018 Mar 30;8(3):e019309. doi: 10.1136/bmjopen-2017-019309

Table 1.

OR based on proportion of exposed controls and sample size

Proportion of exposed controls % Study case:control=1:1
Number of cases
n=500 n=400 n=300
55* OR 1.44 1.50 1.6
45* OR 1.43 1.49 1.58
30† OR 1.45 1.51 1.62

*Exposure=25(OH)D deficiency (25(OH)D<50 nmol /L).

†Exposure=high-serum leptin levels (>4.1 ng/mL).