2.2 Questionnaires
At baseline and follow-up, questionnaires were completed by the
parents/guardians, while children older than 13 years, completed
questionnaires themselves (in addition to questionnaires completed by a
parent/guardian). At baseline, different versions of the questionnaire
covered predefined age brackets (Supplementary Table 1) .
The version that participants received was dependent on the participants
age at time of the questionnaire (ageQ). Presence of eczema, asthma, and
hay fever within each age bracket was reported at baseline. Presence of
FA was reported at follow-up.