Results of multivariate logistic regression models predicting support for total smoking ban at workplaces
| Smokers | Non-smokers | |||
| % support total ban | OR (95% CI) | % support total ban | OR (95% CI) | |
| City | ||||
| Beijing | 44.3 | Referent | 52.0 | Referent |
| Shenyang | 45.7 | 1.11 (0.73 to 1.71) | 52.4 | 1.05 (0.58 to 1.92) |
| Shanghai | 35.0 | 0.65 (0.48 to 0.88) | 49.5 | 0.82 (0.47 to 1.43) |
| Changsha | 36.5 | 0.78 (0.52 to 1.18) | 44.9 | 0.69 (0.41 to 1.16) |
| Guangzhou | 40.2 | 0.81 (0.59 to 1.10) | 53.8 | 1.08 (0.61 to 1.91) |
| Yinchuan | 55.4 | 1.90 (1.32 to 2.74) | 64.3 | 1.78 (1.00 to 3.18) |
| Gender | ||||
| Male | 42.0 | Referent | 51.2 | Referent |
| Female | 62.6 | 2.20 (1.34 to 3.60) | 54.3 | 1.22 (0.93 to 1.62) |
| Age (years) | ||||
| 18–34 | 36.0 | Referent | 50.6 | Referent |
| 35–44 | 39.1 | 1.23 (0.93 to 1.64) | 56.5 | 1.06 (0.67 to 1.69) |
| 45–54 | 44.0 | 1.64 (1.20 to 2.26) | 47.8 | 0.82 (0.49 to 1.37) |
| 55 or older | 46.8 | 1.88 (1.42 to 2.50) | 55.7 | 1.13 (0.67 to 1.91) |
| Ethnic group | ||||
| Han | 42.9 | Referent | 52.7 | Referent |
| Others | 40.2 | 0.61 (0.41 to 0.92) | 55.6 | 0.77 (0.41 to 1.46) |
| Highest education | ||||
| Low | 47.4 | Referent | 59.3 | Referent |
| Medium | 42.6 | 1.01 (0.77 to 1.32) | 52.0 | 0.86 (0.54 to 1.37) |
| High | 40.5 | 0.91 (0.65 to 1.28) | 52.2 | 0.85 (0.50 to 1.46) |
| Household income | ||||
| Low | 45.4 | Referent | 54.3 | Referent |
| Medium | 42.5 | 0.92 (0.74 to 1.15) | 52.9 | 0.92 (0.61 to 1.39) |
| High | 41.5 | 1.03 (0.78 to 1.34) | 52.1 | 0.94 (0.57 to 1.57) |
| Don’t know | 43.6 | 1.11 (0.78 to 1.58) | 55.1 | 0.94 (0.42 to 2.11) |
| Believe smoking causes lung cancer in non-smokers from SHS | ||||
| No/don’t know | 39.9 | Referent | 53.0 | Referent |
| Yes | 45.2 | 1.27 (1.09 to 1.49) | 52.8 | 0.93 (0.66 to 1.31) |
| Self-reported smoking rules at workplaces | ||||
| No rules or restrictions | 36.2 | Referent | 39.4 | Referent |
| Smoking is allowed only in some indoor areas | 31.3 | 0.89 (0.65 to 1.22) | 37.3 | 0.87 (0.45 to 1.70) |
| Smoking is not allowed in any indoor areas | 61.1 | 3.10 (2.23 to 4.29) | 69.3 | 3.60 (2.23 to 5.82) |
| Others | 43.5 | 1.32 (1.03 to 1.70) | 53.6 | 1.68 (1.01 to 2.79) |
| Number of cigarettes smoked per day | ||||
| 1–10 | 46.1 | Referent | Not included in the model | |
| 11–20 | 42.0 | 0.95 (0.76 to 1.17) | ||
| 21–30 | 35.6 | 0.75 (0.56 to 0.99) | ||
| 31 or more | 39.4 | 0.91 (0.65 to 1.28) | ||
SHS, secondhand smoke.