Table 1 Basic characteristics of the study population in urban and rural
| Â | Total | Urban | Rural | p-Value |
|---|---|---|---|---|
N | 25,528 | 13,067 | 12,461 | Â |
Age, years | 59.1 (59.0, 59.2) | 59.7 (59.5, 59.8) | 58.5 (58.3, 58.7) | < 0.001 |
Gender, n (%) | ||||
 Male | 11,574 (45.3) | 5762 (44.1) | 5812 (46.6) |  |
 Female | 13,954 (54.7) | 7305 (55.9) | 6649 (53.4) |  |
Marital status, n (%) | Â | Â | Â | 0.011 |
 Single | 181 (0.7) | 84 (0.6) | 97 (0.8) |  |
 Married | 23,093 (90.5) | 11,767 (90.1) | 11,326 (90.9) |  |
 Divorced or Widowed | 2254 (8.8) | 1216 (9.3) | 1038 (8.3) |  |
Education, n (%) |  |  |  | < 0.001 |
 Primary schools or below | 12,407 (48.6) | 4426 (33.9) | 7981 (64.1) |  |
 Junior high school | 7980 (31.3) | 4556 (34.9) | 3424 (27.5) |  |
 Senior high school | 3963 (15.5) | 2975 (22.8) | 988 (7.9) |  |
 College or above | 1178 (4.6) | 1110 (8.5) | 68 (0.6) |  |
Smoking, n (%) |  |  |  | < 0.001 |
 Ever/Never | 6830 (26.8) | 3065 (23.5) | 3765 (30.2) |  |
 Current | 18,698 (73.2) | 10,002 (76.5) | 8696 (69.8) |  |
Alcohol, n (%) |  |  |  | < 0.001 |
 Ever/Never | 8169 (32.0) | 4189 (32.1) | 3980 (31.9) |  |
 Current | 17,359 (68.0) | 8878 (67.9) | 8481 (68.1) |  |
Physical activity, n (%) |  |  |  | < 0.001 |
 Yes | 4012 (15.7) | 3309 (25.3) | 703 (5.6) |  |
 No | 21,516 (84.3) | 9758 (74.7) | 11,758 (94.4) |  |
Income, n (%) |  |  |  | < 0.001 |
 Low | 11,940 (46.8) | 7024 (53.8) | 4916 (39.5) |  |
 Middle | 5202 (20.4) | 1833 (14.0) | 3369 (27.0) |  |
 High | 7276 (28.5) | 3456 (26.5) | 3820 (30.7) |  |
 Unanswered | 1110 (4.4) | 754 (5.8) | 356 (2.9) |  |
BMI, kg/m2 | 24.1 (24.1, 24.2) | 24.6 (24.6, 24.7) | 23.6 (23.6, 23.7) | < 0.001 |
WC, cm | 82.9 (82.7, 83.0) | 84.2 (84.0, 84.3) | 81.5 (81.3, 81.6) | < 0.001 |
SBP, mmHg | 130.9 (130.6, 131.1) | 130.7 (130.4, 131.1) | 131.0 (130.6, 131.4) | 0.640 |
DBP, mmHg | 81.0 (80.8, 81.1) | 80.9 (80.7, 81.1) | 81.1 (81.9, 81.3) | 0.929 |
TC, mmol/L | 4.79 (4.78, 4.80) | 4.89 (4.87, 4.90) | 4.70 (4.68, 4.72) | < 0.001 |
HDL-C, mmol/L | 1.19 (1.19, 1.20) | 1.18 (1.18, 1.19) | 1.20 (1.20, 1.21) | < 0.001 |
TG, mmol/L | 1.50 (1.49, 1.51) | 1.55 (1.53, 1.57) | 1.44 (1.42, 1.46) | < 0.001 |
FPG, mmol/L | 5.52 (5.50, 5.54) | 5.67 (5.64, 5.69) | 5.36 (5.34, 5.39) | < 0.001 |