Table 1

Sample characteristics by city

VariablesTotal, n=4815Beijing, n=804Shenyang, n=801Shanghai, n=801Changsha, n=803Guangzhou, n=804Yinchuan, n=802
Ethnicity
 Han95.094.594.998.698.699.384.2
 Other5.05.55.11.41.40.715.8
Gender
 Male95.094.597.691.594.497.494.5
 Female5.05.52.48.55.62.65.5
Age
 18–241.42.01.61.01.70.91.1
 25–3917.613.612.610.523.414.031.5
 40–5449.447.457.957.845.344.443.4
 ≥5531.637.027.930.729.640.724.0
Household income per month*
 Low (<¥1000)19.69.331.514.328.312.122.1
 Medium (¥1000–3000)44.940.855.544.041.837.149.9
 High (≥¥3000)28.341.610.037.824.736.219.5
 Don't know7.38.23.04.05.214.78.5
Education
 Low13.19.67.96.017.723.813.6
 Medium65.562.973.174.460.859.961.7
 High21.527.519.019.621.516.424.7
Ever tried to quit smoking
 No46.948.648.859.840.844.438.8
 Yes53.151.451.240.359.255.661.2
Intention to quit
 No76.475.369.283.674.485.171.1
 Yes23.624.730.816.425.614.928.9
  • * ¥1=US$0.1464 (as of 30 May 2010). Equivalents are low income: <US$146, medium income: US$146–439, high income: ≥US$439.