Descriptive results for the child population, the HRs show the relationship between the studied risk factors and coeliac disease risk for the period of 1991–2009
| All children | |||
|---|---|---|---|
| Bivariable* | Multivariable† | ||
| Risk factor | Total N (%) | HR (95% CI), p value | HR (95% CI), p value |
| Season of birth | |||
| Winter | 448 979 (24) | 1.00 | 1.00 |
| Spring | 520 262 (27) | 1.09 (1.01 to 1.16), 0.02 | 1.08 (1.01 to 1.16), 0.02 |
| Summer | 500 090 (26) | 1.10 (1.02 to 1.18), 0.01 | 1.10 (1.03 to 1.18), 0.01 |
| Autumn | 442 863 (23) | 1.09 (1.01 to 1.17), 0.02 | 1.10 (1.02 to 1.18), 0.01 |
| Geographical regions | |||
| North | 330 235 (17) | 1.00 | 1.00 |
| Central | 746 902 (39) | 1.19 (1.10 to 1.29), <0.001 | 1.19 (1.10 to 1.29), <0.001 |
| South | 805 315 (42) | 1.59 (1.48 to 1.71), <0.001 | 1.59 (1.48 to 1.72), <0.001 |
| Sex | |||
| Girls | 929 492 (49) | 1.00 | 1.00 |
| Boys | 982 702 (51) | 1.83 (1.74 to 1.93), <0.001 | 1.83 (1.74 to 1.92), <0.001 |
*Bivariable: regression with one independent variable at a time.
†Multivariable: regression with all independent variables.