Prevalence of second hand smoke (SHS) exposure in infants and magnitude of inequalities in SHS exposure in infants according to income and educational level by survey year.

CI, confidence interval; SII, slope index of inequality; RII, relative index of inequality
a Adjusted by father’s age, mother’s age, infant sex, and socioeconomic status indicators (either income or education)
b The prevalence in 2010 was weighted for the average parental age in 5-year age groups using a direct method and the age distribution in 2001 as the base.
c Adjusted by father’s age, mother’s age, infant sex, and socioeconomic status indicators (both income and education)
Prevalence of second hand smoke (SHS) exposure in infants and magnitude of inequalities in SHS exposure in infants according to income and educational level by survey year.