Descriptive demographics of the study population (N=3676) by city
| Demographics | Shanghai | Nanning | Mudanjiang | Total |
|---|---|---|---|---|
| Age (mean/SD) | 41.34/14.58 | 40.21/15.03 | 40.43/13.46 | 40.69/14.39 |
| Educational level (% (no)) | ||||
| Lowest | 29.6 (391) | 35.9 (423) | 24.4 (287) | 30.0 (1101) |
| Lower | 28.1 (371) | 22.8 (269) | 30.7 (361) | 27.3 (1001) |
| Higher | 17.5 (231) | 21.2 (250) | 21.4 (251) | 19.9 (732) |
| Highest | 24.8 (327) | 20.1 (237) | 23.4 (275) | 22.8 (839) |
| Marital status (% (no)) | ||||
| Married | 79.6 (1045) | 70.1 (828) | 70.1 (822) | 73.5 (2695) |
| Not married | 20.4 (267) | 29.9 (353) | 29.9 (350) | 26.5 (970) |
| Smoking pattern (% (no)) | ||||
| Daily smokers | 99.5 (1313) | 100.0 (1181) | 100.0 (1174) | 99.8 (3668) |
| Intention to quit (% (no)) | ||||
| Within 1 month | 8.4 (111) | 11.7 (138) | 13.4 (157) | 11.1 (406) |
| Within 6 months | 16.5 (217) | 19.1 (225) | 24.5 (288) | 19.9 (730) |