|
Association of family average income and conventional potential confounders |
||||
| Characteristic |
Family Average Income (n, %*) |
p value** |
||
|
|
||||
| Lower (N = 9689) |
Middle (N = 8991) |
Higher (N = 10660) |
||
|
|
||||
| Age group(yrs) |
||||
| 35–49 |
4127 (42.6) |
4880 (54.3) |
4205 (39.4) |
< 0.001 |
| 50–64 |
3142 (32.4) |
2696 (30.0) |
4115 (38.6) |
|
| 65+ |
2420 (25.0) |
1415 (15.7) |
2340 (22.0) |
|
| Gender |
||||
| Female |
5063 (52.3) |
4436 (49.3) |
5243 (49.2) |
0.581 |
| Male |
4626 (47.7) |
4555 (50.7) |
5417 (50.8) |
|
| Area |
||||
| Rural |
6469 (66.8) |
2624 (29.2) |
386 (3.6) |
< 0.001 |
| Urban |
3220 (33.2) |
6367 (70.8) |
10274 (96.4) |
|
| Education (yrs) |
||||
| 0–9 |
9018 (93.1) |
6872 (76.4) |
3947 (37.0) |
< 0.001 |
| 10–12 |
641 (6.6) |
1770 (19.7) |
3070 (28.8) |
|
| 13+ |
30 (0.3) |
349 (3.9) |
3643 (34.2) |
|
| Occupation† |
||||
| Blue collar |
7585 (78.3) |
5538 (61.6) |
2742 (25.7) |
< 0.001 |
| Service people |
1681 (17.3) |
1326 (14.7) |
652 (6.1) |
|
| White collar |
423 (4.4) |
2127 (23.7) |
7266 (68.2) |
|
| BMI (kg/m2) |
||||
| 24- |
6761 (69.8) |
5366 (59.7) |
5967 (56.0) |
< 0.001 |
| 24–28 |
2362 (24.4) |
2834 (31.5) |
3757 (35.2) |
|
| 28+ |
566 (5.8) |
791 (8.8) |
936 (8.8) |
|
| Cigarette Smoking |
||||
| Never |
6393 (66.0) |
6060 (67.4) |
7994 (75.0) |
< 0.001 |
| Ex/Current |
3296 (34.0) |
2931 (32.6) |
2666 (25.0) |
|
| Alcohol consumption |
||||
| No |
7468 (77.1) |
7099 (79.0) |
9003 (84.5) |
< 0.001 |
| Ex/Current |
2221 (22.9) |
1892 (21.0) |
1657 (15.5) |
|
| Diabetes |
||||
| No |
9640 (99.5) |
8844 (98.4) |
10227 (95.9) |
< 0.001 |
| Yes |
49 (0.5) |
147 (1.6) |
433 (4.1) |
|
| High blood pressure |
||||
| No |
6505 (67.1) |
6108 (67.9) |
6987 (65.5) |
0.013 |
| Yes |
3184 (32.9) |
2883 (32.1) |
3673 (34.5) |
|
| Occupational physical activity |
||||
| Light |
4292 (44.3) |
6242 (69.4) |
9761 (91.6) |
< 0.001 |
| Moderate |
1125 (11.6) |
1157 (12.9) |
643 (6.0) |
|
| Vigorous |
4272 (44.1) |
1592 (17.7) |
256 (2.4) |
|
| Leisure-time physical activity |
||||
| Light |
7281 (75.1) |
7502 (83.4) |
8957 (84.0) |
< 0.001 |
| Moderate |
2089 (21.6) |
1374 (15.3) |
1643 (15.4) |
|
| Vigorous |
319 (3.3) |
115 (1.3) |
60 (0.6) |
|
|
* Percentages across column. **P value between sub-groups of each variable. †Blue collar = farmer, factory worker, forestry worker, fisher and military person; Service people = salespeople, house worker and vehicle driver; White collar = office worker, teacher, doctor and academic researcher, government officer. | ||||
Xu et al. BMC Public Health 2008 8:170 doi:10.1186/1471-2458-8-170 |
||||