Mother’s action in protecting the child from SHS exposure, and mother’s advice and support in helping father to quit pre- and post-legislation.

Remark: Values are number (%). For all regression models, odds ratios and regression coefficients were adjusted by age (father, mother & child), father’s education level, years of father smoking, father’s perceived health status, child’s consultation to doctor past month, household income level and number of children at home. Missing data were excluded from analysis. Mother’s action in protecting the child from SHS exposure, and mother’s advice and support in helping father to quit pre- and post-legislation.