Table 1.
Sociodemographic characteristics of the study sample (N = 4,414)
| Variable | N | % of total | Smokers (n, %) |
| Geographic region | |||
| Subei | 958 | 21.7 | 584 (61.0) |
| Jinnan | 1375 | 31.2 | 915 (66.6) |
| Jinbei | 1259 | 18.6 | 850 (67.5) |
| Guiyang | 822 | 28.5 | 601 (73.1) |
| χ2: 29.85, df=2, P<.001 | |||
| Age (years) | |||
| < 25 | 759 | 17.2 | 459 (60.5) |
| 25 – 34 | 981 | 22.2 | 675 (68.8) |
| 35 – 44 | 1444 | 32.7 | 936(64.8) |
| 45 - | 1230 | 27.8 | 880(71.5) |
| χ2: 30.53 df=3, P<0.01 | |||
| Education | |||
| Elementary school | 1864 | 42.2 | 1273 (68.3) |
| Middle school | 1900 | 43.0 | 1281 (67.4) |
| High school | 516 | 11.7 | 333 (64.5) |
| College or higher | 134 | 3.0 | 63 (47.0) |
| χ2: 27.06, df=3, P<0.01 | |||
| Martial status | |||
| Never married | 358 | 8.1 | 165 (46.1) |
| Married | 3970 | 89.9 | 2731 (68.8) |
| Divorced/widowed | 86 | 2.0 | 54 (62.8) |
| χ2: 77.00, df=2, P<0.01 | |||
| Ethnicity | |||
| Han | 4320 | 97.9 | 2880 (66.8) |
| Minority | 94 | 2.1 | 70 (74.5) |
| χ2: 2.53, df=1, P>0.05 | |||
| Occupation | |||
| Farm jobs | 1871 | 42.4 | 1292 (69.1) |
| Floating jobs# | 1533 | 34.7 | 1016 (66.3) |
| Non-farm related jobs | 683 | 11.7 | 466 (67.4) |
| Others (no work capacity) | 327 | 7.4 | 182 (55.7) |
| χ2: 22.59, df=3, P<0.01 | |||
| Average annual income per person (¥)* | |||
| < 1000 | 983 | 22.3 | 608(61.9) |
| 1000–1999 | 1808 | 41.0 | 1233 (68.2) |
| 2000–2999 | 891 | 20.2 | 597 (67.0) |
| 3000–3999 | 377 | 8.5 | 289 (76.6) |
| >= 4000 | 355 | 8.0 | 223 (62.8) |
| χ2: 31.53, df=5, P<0.01 |
#Jobs that required going from place to place. * US$1 = RMB7.6