Table 3.

Overview of questionnaires distributed in the NICE cohort

Questionnaire	Time	Answered by	Questions about
Q1: ‘Allergic heredity and environment’	GW 20–25	Mothers and partners answer one questionnaire each	Education, profession, nationality, allergic heredity, smoking habits, alcohol habits, residence, heating, ventilation, ‘mould’, siblings, pets.
Q2: ‘Infant environment’	18 months	Parents answers about the family	Questions to both parents regarding: profession, education, ethnicity, civil status, smoking habits, hunting habits, residence. Questions about the infant: feeding, vaccinations, travels, daycare, behaviour, siblings, pets.
Q3: ‘Child environment’	48 months	Parents answers about the family	Questions to both parents regarding: profession, education, civil status, smoking habits, hunting habits, residence Questions about the infant: feeding, vaccinations, travels, daycare, behaviour, siblings, pets.

GW, gestational week; NICE, Nutritional impact on Immunological maturation during Childhood in relation to the Environment.