Table 1.
Background characteristics.
| All | Non-smoking | Ex-smoking | Current-smoking | |
|---|---|---|---|---|
| n = 9042 | n = 3545 | n = 3060 | n = 2437 | |
| Age (years) | ||||
| 20–29 | 951 (10.5%) | 653 (18.4%) | 99 (3.2%) | 199 (8.2%) |
| 30–39 | 1440 (15.9%) | 813 (22.9%) | 236 (7.7%) | 391 (16.0%) |
| 40–49 | 1756 (19.4%) | 759 (21.4%) | 448 (14.6%) | 549 (22.5%) |
| 50–59 | 1491 (16.5%) | 479 (13.5%) | 446 (14.6%) | 566 (23.2%) |
| 60–69 | 1697 (18.8%) | 429 (12.1%) | 799 (26.1%) | 469 (19.2%) |
| 70 or more | 1707 (18.9%) | 412 (11.6%) | 1032 (33.7%) | 263 (10.8%) |
| Status of marriage | ||||
| Unmarried | 3586 (39.7%) | 1940 (54.7%) | 694 (22.7%) | 952 (39.1%) |
| Married | 5456 (60.3%) | 1605 (45.3%) | 2366 (77.3%) | 1485 (60.9%) |
| Working pattern | ||||
| Employee | 3587 (39.7%) | 1497 (42.2%) | 938 (42.2%) | 1152 (47.3%) |
| Civil servant | 319 (3.5%) | 166 (4.7%) | 70 (4.7%) | 83 (3.4%) |
| Free-lance | 229 (2.5%) | 82 (2.3%) | 72 (2.3%) | 75 (3.1%) |
| Housewife | 30 (0.3%) | 6 (0.2%) | 16 (0.2%) | 8 (0.3%) |
| Manager | 225 (2.5%) | 60 (1.7%) | 85 (1.7%) | 80 (3.3%) |
| Medical worker | 104 (1.2%) | 48 (1.4%) | 33 (1.4%) | 23 (0.9%) |
| Part-time job | 631 (7.0%) | 303 (8.5%) | 183 (8.5%) | 145 (5.9%) |
| Self owned work | 596 (6.6%) | 167 (4.7%) | 245 (4.7%) | 184 (7.6%) |
| Student | 186 (2.1%) | 149 (4.2%) | 11 (4.2%) | 26 (1.1%) |
| Temporary worker | 552 (6.1%) | 227 (6.4%) | 170 (6.4%) | 155 (6.4%) |
| No occupation | 2332 (25.8%) | 727 (20.5%) | 1158 (20.5%) | 447 (18.3%) |
| Others | 251 (2.8%) | 113 (3.2%) | 79 (3.2%) | 59 (2.4%) |
| Annual household income | ||||
| -2,000,000 JPY | 1339 (14.8%) | 574 (16.2%) | 434 (14.2%) | 331 (13.6%) |
| 2,000,000–4,000,000 JPY | 2423 (26.8%) | 936 (26.4%) | 924 (30.2%) | 563 (23.1%) |
| 4,000,000–6,000,000 JPY | 2138 (23.6%) | 830 (23.4%) | 736 (21.1%) | 572 (23.5%) |
| 6,000,000–8,000,000 JPY | 1311 (14.5%) | 485 (13.7%) | 435 (14.2%) | 391 (16.0%) |
| 8,000,000–10,000,000JPY | 815 (9.0%) | 309 (8.7%) | 233 (7.6%) | 273 (11.2%) |
| 10,000,000 J-PY | 1016 (11.2%) | 411 (11.6%) | 298 (9.7%) | 307 (12.6%) |
| Residency | ||||
| Own house (detached house) | 4988 (55.2%) | 1825 (51.5%) | 1885 (61.6%) | 1278 (52.4%) |
| Own house (condominium) | 1391 (15.4%) | 506 (14.3%) | 511 (16.7%) | 374 (15.3%) |
| Lease (apartment) | 903 (10.0%) | 419 (11.8%) | 214 (7.0%) | 270 (11.1%) |
| Lease (condominium) | 1057 (11.7%) | 459 (12.9%) | 256 (8.4%) | 342 (14.0%) |
| Lease (detached house) | 271 (3.0%) | 113 (3.2%) | 94 (3.1%) | 64 (2.6%) |
| Company house | 103 (1.1%) | 50 (1.4%) | 24 (0.8%) | 29 (1.2%) |
| Dormitory | 65 (0.7%) | 43 (1.2%) | 9 (0.3%) | 13 (0.5%) |
| Others | 264 (2.9%) | 130 (3.7%) | 67 (2.2%) | 67 (2.7%) |
| Presence of child | ||||
| Yes | 4334 (47.9%) | 2251 (63.5%) | 965 (31.5%) | 1118 (45.9%) |
| No | 4708 (52.1%) | 1294 (36.5%) | 2095 (68.5%) | 1319 (54.1%) |