Table 1.
Selected baseline characteristics of study participants, by history of IHD, stroke and either or both.
| All (n = 512 891) |
History of IHD (n = 15 472) |
History of stroke (n = 8884) |
History of either or both (n = 23 129) |
||||
|---|---|---|---|---|---|---|---|
| No. | No. | (%)a | No. | (%)a | No. | (%)a | |
| Age (years) | |||||||
| < 50 | 230 553 | 1510 | (0.6) | 798 | (0.4) | 2277 | (1.0) |
| 50–59 | 157 556 | 4502 | (3.0) | 2690 | (1.8) | 6938 | (4.6) |
| 60–69 | 91 771 | 6416 | (7.0) | 3664 | (4.0) | 9481 | (10.4) |
| 70–79 | 33 011 | 3044 | (8.6) | 1732 | (4.6) | 4433 | (12.5) |
| Mean (SD) | 61.4 (8.7) | 61.5 (8.4) | 61.2 (8.6) | ||||
| Gender | |||||||
| Male | 210 222 | 5714 | (2.5) | 4912 | (2.2) | 10 069 | (4.5) |
| Female | 302 669 | 9758 | (3.4) | 3972 | (1.4) | 13 060 | (4.5) |
| Region | |||||||
| Rural | 286 705 | 4963 | (2.8) | 3615 | (1.2) | 8347 | (3.8) |
| Urban | 226 186 | 10 509 | (3.3) | 5269 | (2.4) | 14 782 | (5.3) |
| Education | |||||||
| No formal school | 95 221 | 2399 | (2.3) | 1518 | (1.7) | 3758 | (3.7) |
| Primary school | 165 216 | 4958 | (2.9) | 3053 | (1.8) | 7689 | (4.5) |
| Middle school | 144 913 | 3804 | (3.2) | 2322 | (1.8) | 5783 | (4.7) |
| High school | 77 527 | 2645 | (3.7) | 1292 | (1.6) | 3712 | (5.0) |
| College/university | 30 014 | 1666 | (3.9) | 699 | (1.3) | 2187 | (4.9) |
| Household income (Yuan/year) | |||||||
| < 4999 | 50 203 | 1232 | (2.6) | 1133 | (2.0) | 2272 | (4.4) |
| 5000–9999 | 94 629 | 2263 | (2.8) | 1505 | (1.9) | 3630 | (4.5) |
| 10 000–19 999 | 149 013 | 5099 | (3.0) | 2937 | (1.8) | 7625 | (4.5) |
| 20 000–34 999 | 126 721 | 4101 | (3.1) | 2026 | (1.6) | 5781 | (4.5) |
| 35 000 + | 92 325 | 2777 | (3.4) | 1283 | (1.5) | 3821 | (4.7) |
| Cigarette smoking | |||||||
| Never | 317 614 | 10 079 | (3.1) | 4458 | (1.7) | 13 845 | (4.5) |
| Ex | 30 563 | 1901 | (4.4) | 1612 | (2.9) | 3274 | (7.1) |
| Current | 164 714 | 3492 | (2.7) | 2814 | (1.6) | 6010 | (4.0) |
| Alcohol drinking | |||||||
| Never | 235 199 | 7853 | (3.4) | 4024 | (2.2) | 11 270 | (5.4) |
| Ex | 9256 | 647 | (6.6) | 754 | (6.3) | 1317 | (13.1) |
| Current | 268 436 | 6972 | (2.5) | 4106 | (1.2) | 10 542 | (3.5) |
| SBP (mm Hg) | |||||||
| < 120 | 163 260 | 3046 | (2.5) | 1065 | (0.9) | 3950 | (3.2) |
| 120–139 | 201 619 | 5578 | (3.1) | 2851 | (1.6) | 8050 | (4.5) |
| 140–159 | 96 713 | 4185 | (3.5) | 2731 | (2.4) | 6517 | (5.6) |
| 160 + | 51 299 | 2663 | (3.7) | 2237 | (3.5) | 4612 | (6.8) |
| Mean (SD) | 140.0 (22.6) | 145.5 (23.6) | 141.2 (23.1) | ||||
| BMI (kg/m2) | |||||||
| < 22.0 | 168 547 | 3000 | (2.0) | 1901 | (1.2) | 4720 | (3.1) |
| 22.0–24.9 | 175 414 | 4660 | (2.9) | 2953 | (1.8) | 7240 | (4.4) |
| 25.0–26.9 | 85 856 | 3255 | (3.6) | 1853 | (2.1) | 4846 | (5.4) |
| 27 + | 83 074 | 4557 | (4.6) | 2177 | (2.4) | 6323 | (6.7) |
| Mean (SD) | 25.1 (3.7) | 24.7 (3.4) | 24.9 (3.6) | ||||
| Self-reported hypertension | 59 703 | 6749 | (8.6) | 5212 | (7.6) | 11 141 | (15.7) |
| Self-reported diabetes | 16 162 | 2053 | (6.9) | 1107 | (4.0) | 2849 | (10.3) |
| Self-rated poor health status | 53 105 | 4297 | (8.4) | 3300 | (6.2) | 7028 | (14.1) |
| Short of breath during walking | 30 351 | 3341 | (10.8) | 1274 | (3.9) | 4305 | (14.1) |
a
Adjusted for age, gender, region and education except when the variable is in question.