Table 1 Demographic, metabolic and lifestyle characteristics of rural and urban 40–100 year-old Chinese adults
|  | Rural (N = 72,712) | Urban (N = 64,233) | Total (N = 13,6945) |
|---|---|---|---|
No. (%) | No. (%) | No. (%) | |
Age | |||
 Median (IQR) | 55.0 (49.0–62.0) | 56.0 (50.0–63.0) | 55.0 (49.0–63.0) |
 40–49 | 20,129 (27.7) | 15,922 (24.8) | 36,051 (26.3) |
 50–59 | 30,366 (41.8) | 27,494 (42.8) | 57,860 (42.3) |
 60–69 | 13,923 (19.1) | 12,560 (19.6) | 26,483 (19.3) |
 70 and above | 8294 (11.4) | 8257 (12.8) | 16,552 (12.1) |
Sex | |||
 Men | 37,728 (51.9) | 32,835 (51.1) | 70,563 (51.5) |
 Women | 34,984 (48.1) | 31,398 (48.9) | 66,382 (48.5) |
History of CHD | |||
 Yes | 65,704 (90.4) | 58,702 (91.4) | 12,4406 (90.8) |
 No | 7008 (9.6) | 5531 (8.6) | 12,539 (9.2) |
History of Dyslipidemia | |||
 Yes | 44,834 (61.8) | 40,346 (64.2) | 85,180 (62.9) |
 No | 27,722 (38.2) | 22,501 (35.8) | 50,223 (37.1) |
History of Stroke | |||
 Yes | 56,563 (77.8) | 51,846 (80.7) | 10,8409 (79.2) |
 No | 16,150 (22.2) | 12,387 (19.3) | 28,537 (20.8) |
Geographical Regions | |||
 bNorth | 39,102 (53.8) | 37,093 (57.7) | 76,195 (55.6) |
 South | 33,611 (46.2) | 27,140 (42.3) | 60,751 (44.4) |
 cStroke Belt | 11,960 (16.4) | 11,689 (18.2) | 23,649 (17.3) |
 Non-stroke Belt | 60,753 (83.6) | 52,544 (81.8) | 11,3297(82.7) |
Socio- economic region | |||
 Low- income | 20,395 (28.0) | 11,909 (18.5) | 32,304 (23.6) |
 Middle- income | 23,853 (32.8) | 17,097 (26.6) | 40,950 (29.9) |
 High-income | 28,464 (39.1) | 35,223 (54.8) | 63,691 (46.5) |
  Han Nationality | 70,333 (96.7) | 62,106 (96.7) | 13,2439 (96.7) |
BMIa | |||
 Median (IQR) | 25.0 (22.8–27.6) | 25.3 (23.2–27.4) | 25.2 (23.0–27.5) |
 Underweight (< 18.5 kg/m2 | 1050 (1.4) | 802 (1.2) | 1852 (1.4) |
 Normal (18.5 - < 24.0) | 25,864 (35.6) | 21,237 (33.1) | 47,101 (34.4) |
 Overweight (24.0 - < 28) | 30,690 (42.2) | 29,316 (45.6) | 60,006 (43.8) |
 Obesity (≥28.0) | 15,108 (20.8) | 12,879 (20.1) | 27,987 (20.4) |
Waist circumference†| |||
 Median (IQR) | 86.0 (80.0–93.0) | 86.0 (80.0–93.0) | 86.0 (80.0–93.0) |
 Normal < 90/85 cm (M/W) | 31,077 (42.7) | 25,676 (40.9) | 56,753 (41.9) |
 Central obese ≥90/85 cm (M/W) | 41,621 (57.3) | 37,083 (59.1) | 78,704 (58.1) |
 Diabetes Mellitus | 20,529 (28.2) | 21,008 (32.7) | 41,537 (30.3) |
 Hypertension | 46,155 (63.5) | 39,280 (61.2) | 85,435 (62.4) |
 Drinking (Current) | 14,082 (19.4) | 12,084 (18.8) | 26,166 (19.1) |
 Smoking (Current) | 25,677 (35.3) | 19,174 (29.9) | 44,851 (32.8) |
 Physical inactivity | 23,455 (32.3) | 28,599 (44.5) | 52,054 (38.0) |
Lipid variables: Median (IQR) | |||
 TC mmol/l | 4.92 (4.22–5.64) | 4.88 (4.23–5.58) | 4.90 (4.23–5.61) |
 HDL-C mmol/l | 1.35 (1.10–1.65) | 1.28 (1.08–1.55) | 1.31 (1.09–1.60) |
 LDL-C mmol/l | 2.85 (2.20–3.42) | 2.85 (2.24–3.40) | 2.85 (2.21–3.41) |
 Triglycerides mmol/l | 1.50 (1.04–2.16) | 1.51 (1.09–2.15) | 1.50 (1.06–2.15) |
 Non-HDL-C‡ mmol/l | 3.51 (2.80–4.24) | 3.53 (2.88–4.22) | 3.52 (2.84–4.23) |