Table 1 Socioeconomic status of subjects by age, sex, geographic regions and urban/rural areas
| Â | Â | Educational level | Household income | ||||
|---|---|---|---|---|---|---|---|
Characteristics | Total n | ≥ 12 years | 9-11 years | < 9 years | High | Middle | Low |
Total | 49363 | 11449 (23.2) | 16465 (33.4) | 21449 (43.5) | 13210 (29.9) | 16366 (37.1) | 14545 (33.0) |
Age | Â | Â | Â | Â | Â | Â | Â |
   15-29 | 7929 | 2504 (31.6) | 3629 (45.8) | 1796 (22.7) | 2323 (33.2) | 2722 (38.9) | 1949 (27.9) |
   30-39 | 11536 | 3000 (26.0) | 4420 (38.3) | 4116 (35.7) | 3357 (32.0) | 4130 (39.3) | 3019 (28.7) |
   40-49 | 12133 | 3294 (27.1) | 4313 (35.5) | 4526 (37.3) | 3184 (29.1) | 4414 (40.4) | 3329 (30.5) |
   50-59 | 11067 | 1749 (15.8) | 2890 (26.1) | 6428 (58.1) | 2754 (27.9) | 3463 (35.1) | 3639 (36.9) |
   60-69 | 6698 | 902 (13.5) | 1213 (18.1) | 4583 (68.4) | 1592 (27.3) | 1637 (28.0) | 2609 (44.7) |
Sex | Â | Â | Â | Â | Â | Â | Â |
   Men | 23218 | 5885 (25.3) | 8668 (37.3) | 8665 (37.3) | 6203 (29.7) | 7711 (37.0) | 6937 (33.3) |
   Women | 26145 | 5564 (21.3) | 7797 (29.8) | 12784 (48.9) | 7007 (30.1) | 8655 (37.2) | 7608 (32.7) |
Urban/rural | Â | Â | Â | Â | Â | Â | Â |
   Urban | 19328 | 7567 (39.2) | 6531 (33.8) | 5230 (27.1) | 8226 (47.8) | 5917 (34.4) | 3066 (17.8) |
   Rural | 30035 | 3882 (12.9) | 9934 (33.1) | 16219 (54.0) | 4984 (18.5) | 10449 (38.8) | 11479 (42.7) |
Geographic region | Â | Â | Â | Â | Â | Â | Â |
   West | 17184 | 2956 (17.2) | 5143 (29.9) | 9085 (52.9) | 2885 (18.9) | 5224 (34.2) | 7176 (46.9) |
   Central | 15427 | 3877 (25.1) | 5362 (34.8) | 6188 (40.1) | 3760 (27.4) | 5797 (42.3) | 4160 (30.3) |
   East | 16752 | 4616 (27.6) | 5960 (35.6) | 6176 (36.9) | 6565 (43.4) | 5345 (35.4) | 3209 (21.2) |
Smoking status | Â | Â | Â | Â | Â | Â | Â |
   Never | 32529 | 7758 (23.8) | 10275 (31.6) | 14496 (44.6) | 9003 (31.2) | 10575 (36.6) | 9319 (32.2) |
   Ever | 16503 | 3638 (22.0) | 6077 (36.8) | 6788 (41.2) | 4136 (27.7) | 5693 (38.1) | 5104 (34.2) |
Passive smoking | Â | Â | Â | Â | Â | Â | Â |
   Yes | 22770 | 5579 (24.5) | 7726 (33.9) | 9465 (41.6) | 6408 (31.3) | 7790 (38.0) | 6304 (30.7) |
   No | 26308 | 5786 (22.0) | 8618 (32.8) | 11904 (45.2) | 6702 (28.7) | 8499 (36.4) | 8160 (34.9) |