Table 2.
Risk of coeliac disease among those prenatally exposed to extra vitamin D and dependent on season of birth.
| Odds Ratio | 95% CI 1 | p–Value | ||
|---|---|---|---|---|
| Vitamin D fortification policy 2 | 0.054 | |||
| Not exposed (ref) | 1 | |||
| exposed | 0.81 | 0.66; 1.00 | ||
| Gender | <0.001 | |||
| Women (ref) | 1 | |||
| Men | 0.54 | 0.44; 0.68 | ||
| Season of birth 3 | 0.02 | |||
| Nov–Jan (winter)(ref) | 1 | |||
| Feb–Apr (spring) | 1.28 | 0.91; 1.78 | 0.16 | |
| May–Jul (summer) | 1.51 | 1.10; 2.09 | 0.01 | |
| Aug–Oct (autumn) | 1.60 | 1.16; 2.21 | 0.004 |
1 CI = Confidence interval. 2 Adjusted for sex and season of birth. 3 Adjusted for sex and the vitamin D fortification policy.