Sample characteristics for smokers at each wave and non-smokers at Wave 3
| Wave 1 smokers (n=4732) | Wave 2 smokers (n=4843) | Wave 3 smokers (n=5583) | Wave 3 non-smokers (n=1417) | |
|---|---|---|---|---|
| n (%) | n (%) | n (%) | n (%) | |
| Recontact respondents from previous wave | NA | 3726 (76.9) | 3549 (63.6) | 1088 (76.8) |
| City | ||||
| Beijing | 785 (16.6) | 801 (16.6) | 802 (14.4) | 217 (15.3) |
| Shenyang | 781 (16.5) | 799 (16.5) | 788 (14.1) | 199 (14.0) |
| Shanghai | 784 (16.6) | 803 (16.6) | 784 (14.0) | 204 (14.4) |
| Changsha | 800 (16.9) | 795 (16.4) | 772 (13.8) | 204 (14.4) |
| Guangzhou | 791 (16.7) | 833 (17.2) | 829 (14.9) | 206 (14.5) |
| Kunming | NA | NA | 800 (14.3) | 195 (13.8) |
| Yinchuan | 791 (16.7) | 812 (16.8) | 808 (14.5) | 192 (13.6) |
| Gender | ||||
| Male | 4501 (95.1) | 4589 (94.8) | 5286 (94.7) | 547 (38.6) |
| Female | 231 (4.9) | 254 (5.2) | 297 (5.3) | 870 (61.4) |
| Age (years) | ||||
| 18–24 | 56 (1.2) | 46 (1.0) | 95 (1.7) | 64 (4.6) |
| 25–39 | 792 (16.7) | 766 (15.8) | 1038 (18.6) | 291 (20.6) |
| 40–54 | 2314 (48.9) | 2352 (48.6) | 2566 (46.0) | 515 (36.3) |
| 55+ | 1570 (33.2) | 1679 (34.7) | 1884 (33.7) | 547 (38.6) |
| Ethnicity | ||||
| Han | 4497 (95.0) | 4591 (94.8) | 5186 (92.3) | 1312 (92.6) |
| Other | 235 (5.0) | 250 (5.2) | 385 (6.9) | 105 (7.4) |
| Education | ||||
| Low | 620 (13.1) | 588 (12.1) | 661 (11.8) | 164 (11.6) |
| Moderate | 3098 (65.5) | 3200 (66.1) | 3543 (63.5) | 828 (58.4) |
| High | 1009 (21.5) | 1025 (21.2) | 1360 (24.4) | 410 (28.9) |
| Income | ||||
| Low | 925 (19.6) | 794 (16.4) | 549 (9.9) | 115 (8.1) |
| Moderate | 2132 (45.1) | 2199 (45.4) | 2133 (38.2) | 587 (41.4) |
| High | 1332 (28.1) | 1524 (31.5) | 2575 (46.1) | 652 (46.0) |
| No Information | 340 (7.2) | 319 (6.6) | 316 (5.7) | 61 (4.3) |
The % are percentages of the total number of respondents in each wave. Some categories (such as income) do not add up to 100% due to a small number of missing/refused responses for that variable.
NA, not applicable.