Changes in waist circumference from baseline to 3-year follow-up (row %).

<p>^a P value was calculated from signed-rank test between baseline and 3-year follow-up.</p><p>^b Maintained same WC category at baseline and follow-up.</p><p>^c Increased WC from baseline to follow-up.</p><p>^d Decreased WC from baseline to follow-up.</p><p>Changes in waist circumference from baseline to 3-year follow-up (row %).</p

Adjusted odds ratios for SHS exposure and medical services use in current and never-smokers.

a<p>Adjusting for sex, age, highest parental education, housing type, school clustering effects, mutually adjusted for SHS at home and outside home, and additionally adjusted for cigarette consumption per day and years of smoking in current smokers.</p>b<p>Only students who had been exposed to SHS outside home ≤2 days/wk were included.</p>c<p>P for interaction between any SHS exposure in current and never-smokers.</p>d<p>Only students who had been exposed to SHS at home ≤2 days/wk were included.</p

Changes in weight status from baseline to 3-year follow-up (row %).

<p>^a P value from signed-rank test between baseline and 3-year follow-up.</p><p>^b Maintained same weight status at baseline and follow-up.</p><p>^c Increased BMI from baseline to follow-up.</p><p>^d Decreased BMI from baseline to follow-up.</p><p>Changes in weight status from baseline to 3-year follow-up (row %).</p

Basic characteristics of subjects by poor self-rated health (SRH).

<p> Weighted by sex and age of 2011 census data.</p

Prevalence (weighted) of monthly health information seeking (%, 95% CI) by year.

†<p>Comparing proportion of monthly health information seeking in 2012 vs 2009.</p>‡<p>P for trend of odds ratios (OR) of monthly health information seeking using 2009 as reference group.</p>*<p>P<0.05, **P<0.01, ***P<0.001.</p

Proportions of BMI and waist circumference categories at baseline and 3-year follow-up, cross-sectional analysis.

<p>^a Column percentage unless otherwise stated.</p><p>^b P value from paired t-test between baseline and 3-year follow-up.</p><p>^c P value from signed-rank test between baseline and 3-year follow-up.</p><p>Proportions of BMI and waist circumference categories at baseline and 3-year follow-up, cross-sectional analysis.</p

Mediation effects of information seeking from newspapers/magazines and Internet on disparities in poor SRH ^†.

<p>^† All figures are β-coefficients. ***P<0.001. Total effect of educational attainment on poor self-rated health was 17.4% (SE 0.017, 95% CI 14.1%–20.8%); indirect effect of information seeking on self-rated health was 1.6% (SE 0.5%, 95% CI 0.7%–2.6%), which yielded 9.2% of the total effect was mediated through health information seeking from newspapers/magazines and Internet (Sobel test P<0.01). Total effect of household income on poor self-rated health was 16.9% (SE 0.018, 95%CI: 13.7%–20.5%); indirect effect of information seeking on self-rated health was 1.3% (SE 0.3%, 95% CI 0.7%–2.0%), which yielded 7.9% of the total effect was mediated through health information seeking from newspapers/magazines and Internet (Sobel test P<0.01).</p

Socio-demographic characteristics, chronic disease and behaviours of all subjects in 3 surveys (%).

<p>Socio-demographic characteristics, chronic disease and behaviours of all subjects in 3 surveys (%).</p

Associations of health behaviours and status with health information seeking among all subjects in 3 surveys.

a<p>Adjusting for sex, age, marital status, education, employment, income, year and mutually adjusted for variables in the table.</p

Odds ratios (ORs) of poor SRH by socio-demographic characteristics.

<p> Adjusting for year and mutually adjusted for variables in the table.</p><p>**P <0.01, ***P <0.001. P <0.05, </p