Descriptive statistics, 2006–2009
| Variable description | Mean | SD |
|---|---|---|
| Binary variables | ||
| Male | 0.963 | – |
| Monthly household income: < ¥1000 | 0.161 | – |
| Monthly household income: ¥1000–2999 | 0.464 | – |
| Monthly household income: ¥3000–4999 | 0.240 | – |
| Monthly household income: ≥ ¥5000 | 0.134 | – |
| Education: Primary school or less | 0.125 | – |
| Education: Middle school | 0.327 | – |
| Education: High school | 0.358 | – |
| Education: Beyond secondary school | 0.190 | – |
| Wave 1 (2006) | 0.332 | – |
| Wave 2 (2007–08) | 0.365 | – |
| Wave 3 (2009) | 0.303 | – |
| City: Beijing | 0.172 | – |
| City: Shenyang | 0.138 | – |
| City: Shanghai | 0.224 | – |
| City: Changsha | 0.185 | – |
| City: Guangzhou | 0.142 | – |
| City: Yinchuan | 0.139 | – |
| Continuous variables | ||
| Age at Wave 1 | 50.8 | 12.3 |
| Cigarette tier price, nominal | 6.32 | 6.36 |
| Cigarette tier price, real, in 2006 terms | 6.24 | 6.30 |
| Average daily cigarette consumption at Wave 1 | 17.7 | 10.8 |
Binary variables equal 1 if the description applies and 0 otherwise. The sample includes 3477 smokers and 8552 person-years, weighted based on the complex survey design.