Quartiles of vitamin A intake | ptrend-value# | Per sd | ||||
Quartile 1 | Quartile 2 | Quartile 3 | Quartile 4 | |||
Preformed vitamin A | ||||||
Cases/non-cases | 108/1026 | 90/1063 | 99/1037 | 93/1024 | ||
Model 1 | 1.00 | 0.76 (0.56–1.02) | 0.81 (0.59–1.11) | 0.70 (0.49–1.01) | 0.10 | 0.83 (0.71–0.97) |
Model 2 | 1.00 | 0.77 (0.57–1.04) | 0.81 (0.59–1.10) | 0.68 (0.47–0.99) | 0.07 | 0.82 (0.70–0.96) |
β-carotene equivalent | ||||||
Cases/non-cases | 95/1023 | 76/1044 | 111/1061 | 108/1022 | ||
Model 1 | 1.00 | 0.78 (0.57–1.07) | 1.12 (0.83–1.51) | 1.12 (0.82–1.54) | 0.26 | 1.06 (0.95–1.18) |
Model 2 | 1.00 | 0.80 (0.58–1.10) | 1.15 (0.84–1.56) | 1.16 (0.85–1.60) | 0.20 | 1.07 (0.96–1.20) |
Data for case/non-cases are presented as n/n. Multivariable model 1: sex and total energy intake. Multivariable model 2: further adjusted for maternal education, housing tenure at birth, financial difficulty during pregnancy, maternal ethnicity, maternal history of atopic disease, paternal history of atopic disease, maternal smoking, older sibling, younger sibling, supplement use and season when the food frequency questionnaire was completed. #: linear trend was tested by treating the median values of quartiles as a continuous variable.