Multivariate models for the changes in salivary cotinine concentrations and prevalence of any respiratory symptom between baseline and follow-up in Spain and Portugal & Andorra.

*In Spain, smoking was permitted in all venues at baseline (before the law entered into effect), and was completely banned, permitted in designated areas, or permitted throughout the premises at follow-up. In Portugal and Andorra, smoking was allowed without restrictions at both baseline and follow-up.
**Adjusted for sex, age, body mass index, self-reported second-hand smoke exposure at work and other settings, number of hours worked, geographical area, day and moth of saliva collection by generalized least squared regression with random effects.
†Adjusted for sex, age, body mass index, self-reported second-hand smoke exposure at settings other than the workplace, number of hours worked, and geographical area by logistic regression with random effects. Percentage change corrected for baseline prevalence of any symptom.