Food exclusions n (%), and comparison between sex and school grade
| Food exclusion due to intolerance, n (%) | Prevalence ratio of food intolerance (95% CI) | |
| All (n=1040) | 136 (13) | |
| Sex | ||
| Male (n=532) | 52 (10) | 1 (Ref)* |
| Female (n=508) | 84 (17) | 1.66 (1.31 to 2.01) |
| School grade | ||
| 1st (n=498) | 55 (11) | 1 (Ref)† |
| 2nd (n=295) | 34 (12) | 1.03 (0.61 to 1.45) |
| 3rd (n=247) | 47 (19) | 1.67 (1.29 to 2.05) |
| Food exclusion due to other reasons than intolerance, n (%) | Prevalence ratio of food exclusion (95% CI) | |
| All (n=1040) | 205 (20) | |
| Sex | ||
| Male (n=532) | 90 (17) | 1 (Ref)* |
| Female (n=508) | 115 (23) | 1.36 (1.08 to 1.64) |
| School grade | ||
| 1st (n=498) | 109 (22) | 1 (Ref)† |
| 2nd (n=295) | 62 (21) | 0.95 (0.65 to 1.25) |
| 3rd (n=247) | 34 (14) | 0.62 (0.25 to 0.99) |
*Adjusted for school grade.
†Adjusted for sex.