Multiple logistic regression and city-stratified analyses between smoking rationalisation and intention to quit
| Independent variables | Total (n=3710) | Shanghai (n=1338) | Nanning (n=1174) | Mudanjiang (n=1198) |
| OR (95% CI) | ||||
| Demographics | ||||
| Age (year) | 0.98 (0.97 to 0.99)** | 0.98 (0.96 to 1.00)* | 0.99 (0.97 to 1.01) | 0.99 (0.97 to 1.01) |
| Ethnicity | ||||
| Han | 1.00 (reference) | 1.00 (reference)† | 1.00 (reference) | 1.00 (reference) |
| Others | 1.00 (0.71 to 1.40) | – | 0.99 (0.68 to 1.44) | 1.20 (0.51 to 2.82) |
| Education level | ||||
| Low | 1.00 (reference) | 1.00 (reference) | 1.00 (reference) | 1.00 (reference) |
| Medium | 0.87 (0.68 to 1.10) | 0.72 (0.46 to 1.14) | 1.02 (0.65 to 1.59) | 0.75 (0.50 to 1.12) |
| High | 0.78 (0.60 to 1.00) | 0.66 (0.37 to 1.19) | 1.39 (0.90 to 2.15) | 0.48 (0.32 to 0.75) |
| Income (¥) | ||||
| <2000 | 1.00 (reference) | 1.00 (reference) | 1.00 (reference) | 1.00 (reference) |
| 2000~ | 1.07 (0.84 to 1.37) | 0.81 (0.47 to 1.42) | 0.81 (0.54 to 1.23) | 1.42 (0.96 to 2.09) |
| 4000~ | 1.05 (0.79 to 1.40) | 0.77 (0.42 to 1.41) | 0.91 (0.57 to 1.47) | 1.36 (0.83 to 2.23) |
| 6000~ | 0.86 (0.60 to 1.24) | 0.47 (0.22 to 0.99) | 0.69 (0.39 to 1.22) | 1.42 (0.72 to 2.81) |
| Marital status | ||||
| Married | 1.00 (reference) | 1.00 (reference) | 1.00 (reference) | 1.00 (reference) |
| Not married | 1.28 (1.01 to 1.64)* | 0.74 (0.42 to 1.29) | 0.76 (0.49 to 1.18) | 0.87 (0.61 to 1.26) |
| Occupation | ||||
| Professionals | 1.00 (reference) | 1.00 (reference) | 1.00 (reference) | 1.00 (reference) |
| Officers and clerks in government, institutions and corporations | 1.29 (0.97 to 1.70) | 0.53 (0.26 to 1.08) | 1.15 (0.71 to 1.84) | 1.79 (1.17 to 2.75) |
| Business or service employees | 1.00 (0.74 to 1.34) | 0.64 (0.34 to 1.20) | 1.10 (0.65 to 1.87) | 1.24 (0.76 to 2.01) |
| Farmers and manual workers | 0.65 (0.50 to 0.86)** | 0.53 (0.27 to 1.02) | 0.73 (0.45 to 1.18) | 0.60 (0.39 to 0.93)* |
| Students | 1.25 (0.80 to 1.95) | 1.10 (0.49 to 2.46) | 1.74 (0.81 to 3.74) | 0.80 (0.35 to 1.81) |
| Retired people | 0.85 (0.56 to 1.30) | 0.99(0.46-−2.10) | 1.30 (0.60 to 2.85) | 0.30 (0.13 to 0.70)** |
| Smoking-related variables | ||||
| Knowledge‡ | 0.88 (0.81 to 0.97)** | 0.94 (0.80 to 1.11) | 0.86 (0.74 to 1.00)* | 0.87 (0.77 to 0.99)* |
| Nicotine dependence | 0.85 (0.81 to 0.89)*** | 0.83 (0.76 to 0.91)*** | 0.90 (0.83 to 0.98)* | 0.80 (0.74 to 0.87)*** |
| History of quit attempt | ||||
| No | 1.00(reference) | 1.00(reference) | 1.00(reference) | 1.00(reference) |
| Yes | 2.70 (2.25 to 3.25)*** | 3.98 (2.73 to 5.80)*** | 2.59 (1.88 to 3.56)*** | 2.11 (1.56 to 2.86)*** |
| Smoking rationalisation | 0.52 (0.44 to 0.61)*** | 0.30 (0.21 to 0.42)*** | 0.63 (0.47 to 0.84) *** | 0.70 (0.52 to 0.95)* |
| City | – | – | – | |
| Shanghai | 1.00 (reference) | |||
| Nanning | 1.33 (1.04 to 1.70)* | |||
| Mudanjiang | 1.73 (1.38 to 2.16)*** | |||
↵*p<0.05; **p<0.01; ***p<0.001.
†There were only four non-Han ethnic smokers in Shanghai sample.
‡knowledge is knowledge of smoking-related diseases.