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).