Independent variables | OR | 95% CI |
History of allergic disease | 5.8 | 1.8 to 18.2 |
Skin sensitisation to wheat or α-amylase | 4.3 | 1.2 to 14.9 |
Exposure to wheat outside school | 3.3 | 0.8 to 13.7 |
Drug treatment for allergic disease | 2.4 | 0.8 to 7.7 |
Atopy (prick test) | 1.1 | 0.3 to 3.8 |
Odds ratios (ORs) are derived from multivariate marginal logistic regression analysis using the generalised estimating equation approach to longitudinal data: 95% CIs were obtained from robust variance estimates.