Overall prevalence of self-reported food allergy in Canada

[...]our imputation did not consider demographic or other factors that may influence the development and/or reporting of allergy because these data were unavailable for nonresponders. Since awareness of or experience with food allergy may influence a subject's willingness to participate in our survey, it is possible that responders were more likely to have food allergies than nonresponders, possibly creating a selection bias. [...]it is critical to encourage all who suspect they have a food allergy to seek appropriate medical care to ensure correct diagnosis and follow-up.