Wording of exposure questions

Study	Wording
	Ever mould/moisture in the house
5 CESAR countries26	Have you ever had moisture stains or moulds in your house during the life of this child?
Austria27	Have you ever had moisture stains or moulds in your house?
Germany28	Was there any mould or mildew in the flat (not on the food)?
North America23	Has there ever been mould or mildew on any surfaces (other than food) inside the home?
Russia24	Has there ever been mould on any surface (other than food) inside the house?
Switzerland30	Has there ever been mould or mildew on any surface, other than food, inside the home?
	Mould/moisture in the child’s bedroom
Italy25	In the room where your child sleeps are there persistent moisture or mould spots on the walls?
Russia24	Has there ever been mould on any surface (other than food) inside the child’s bedroom?
Switzerland30	Has there ever been mould or mildew on any surface, other than food, inside the child’s bedroom?
	Recent mould/moisture in the house
5 CESAR countries26	Have you ever had moisture stains or moulds on indoor surfaces in your house in the last two years?
The Netherlands29	Any yes from:
	Have you seen mould stains on the walls or ceiling of your bathroom in the past 12 months
	Have you seen mould stains on the walls or ceiling of your kitchen, living room and/or bedroom in the past 12 months?
North America23	Has there ever been mould or mildew on any surfaces (other than food) inside the home in the last 12 months?
Russia24	Has there been any mould on any surfaces inside the home during the past 12 months?

Wordings in italics show the variable used as the exposure in the main analyses. Sensitivity analyses explored the effect of differences between wordings.