Table 1.
Characteristics of 11,236 participants stratified by survey year (N, %).
| Variable | 2004 | 2006 | 2009 | 2011 | Total | Smoker 1 | Drinker 2 | |
|---|---|---|---|---|---|---|---|---|
| Residence | Urban | 928 (33.57) | 871 (32.93) | 816 (32.00) | 1315 (40.13) | 3930 (34.98) | 62 (36.69) | 647 (55.30) |
| Rural | 1836 (66.43) | 1774 (67.07) | 1734 (68.00) | 1962 (59.87) | 7306 (65.02) | 107 (63.31) | 523 (44.70) | |
| Age | 39.04 ± 8.44 | 37.68 ± 8.15 | 36.03 ± 8.21 | 35.34 ± 8.09 | 36.96 ± 8.35 | — | — | |
| Father resides with family | Yes | 281 (10.17) | 270 (10.21) | 273 (10.71) | 380 (11.60) | 1204 (10.72) | 8 (4.73) | 146 (12.48) |
| No | 2483 (89.83) | 2375 (89.79) | 2277 (89.29) | 2897 (88.40) | 10,032 (89.28) | 161 (95.27) | 1024 (87.52) | |
| Mother resides with family | Yes | 337 (12.19) | 300 (11.34) | 309 (12.12) | 449 (13.70) | 1395 (12.42) | 12 (7.10) | 179 (15.30) |
| No | 2427 (87.81) | 2345 (88.66) | 2241 (87.88) | 2828 (86.30) | 9841 (87.58) | 157 (92.90) | 991 (84.70) | |
| Marital status | Single | 251 (9.08) | 246 (9.30) | 249 (9.76) | 325 (9.92) | 1071 (9.53) | 9 (5.33) | 131 (11.20) |
| Married | 2409 (87.16) | 2332 (88.17) | 2248 (88.16) | 2874 (87.70) | 9863 (87.78) | 145 (85.80) | 996 (85.13) | |
| Divorced | 49 (1.77) | 32 (1.21) | 29 (1.14) | 52 (1.59) | 162 (1.44) | 8 (4.73) | 29 (2.48) | |
| Widowed | 54 (1.95) | 28 (1.06) | 17 (0.67) | 22 (0.67) | 121 (1.08) | 7 (4.14) | 12 (1.03) | |
| Separated | 1 (0.04) | 7 (0.26) | 7 (0.27) | 4 (0.12) | 19 (0.17) | 0 (0.00) | 2 (0.17) | |
| Household registration type | Urban | 1084 (39.22) | 1029 (38.90) | 933 (36.59) | 1558 (47.54) | 4604 (40.98) | 47 (27.81) | 652 (55.73) |
| Rural | 1680 (60.78) | 1616 (61.10) | 1617 (63.41) | 1719 (52.46) | 6632 (59.02) | 122 (72.19) | 518 (44.27) | |
| Highest educational level | PSB 3 (ref) | 303 (10.96) | 255 (9.64) | 209 (8.20) | 274 (8.36) | 1041 (9.26) | 29 (17.16) | 85 (7.26) |
| SPSG 4 | 1610 (58.25) | 1578 (59.66) | 1586 (62.20) | 1721 (52.52) | 6495 (57.81) | 110 (65.09) | 473 (40.43) | |
| HSTS 5 | 687 (24.86) | 623 (23.55) | 552 (21.65) | 745 (22.73) | 2607 (23.20) | 22 (13.02) | 357 (30.51) | |
| UA 6 | 164 (5.93) | 189 (7.15) | 203 (7.96) | 537 (16.39) | 1093 (9.73) | 8 (4.73) | 255 (21.79) | |
| Current educational status | Yes 7 | 79 (2.86) | 71 (2.68) | 66 (2.59) | 128 (3.91) | 344 (3.06) | 4 (2.37) | 41 (3.50) |
| No 8 | 2685 (97.14) | 2574 (97.32) | 2484 (97.41) | 3149 (96.09) | 10,892 (96.94) | 165 (97.63) | 1129 (96.50) | |
| Employment status | Yes | 1808 (65.41) | 1852 (70.02) | 1830 (71.76) | 2377 (72.54) | 7867 (70.02) | 113 (66.86) | 899 (76.84) |
| No | 956 (34.59) | 793 (29.98) | 720 (28.24) | 900 (27.46) | 3369 (29.98) | 56 (33.14) | 271 (23.16) | |
1 Participants who had previous smoking experience; 2 Participants who had previous drinking experience; 3 Primary school and below; 4 Secondary and primary school graduates; 5 High school and secondary technical school; 6 University or above; 7 Students; 8 Participants who were not attending school.