Association between SES and Heaviness of smoking index using ordered Logit model: OR with 95% CI.

<p>Association between SES and Heaviness of smoking index using ordered Logit model: OR with 95% CI.</p

Association between SES and cigarette consumption using the sample selection model /OLS: Coefficient with standard error.

<p>Association between SES and cigarette consumption using the sample selection model /OLS: Coefficient with standard error.</p

Association between SES and high health risk related to smoking using Logit model: OR with 95% CI.

<p>Association between SES and high health risk related to smoking using Logit model: OR with 95% CI.</p

Association between SES and smoker using Logit model (non-smoker as reference): OR with 95% CI.

<p>Association between SES and smoker using Logit model (non-smoker as reference): OR with 95% CI.</p

Characteristics of the survey respondents, CHARLS 2013 (%).

<p>Characteristics of the survey respondents, CHARLS 2013 (%).</p