Father’s environment before conception and asthma risk in his children: a multi-generation analysis of the Respiratory Health In Northern Europe study

In a longitudinal, multi-country study, parents of 24 168 offspring aged 2–51 years provided information on their life-course smoking habits, occupational exposure to welding and metal fumes, and offspring’s asthma before/after age 10 years and hay fever. Logistic regressions investigated the relevant associations controlled for age, study centre, parental characteristics (age, asthma, education) and clustering by family.

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