Respiratory health outcomes as associated with occupational cleaning in 13283 persons from Northern Europe population samples.

* Adjusted for sex, age, smoking, education level, parents’ education level, BMI and participating centre.
† Asthma symptoms: Yes to three or more out of 6 questions on asthma-like symptoms.
‡ Asthma after 16 years of age.
|| p for trend was estimated using years of exposure as a continuous variable.
Respiratory health outcomes as associated with occupational cleaning in 13283 persons from Northern Europe population samples.