Table 2. Prevalence of Isolated Systolic Hypertension Among Young and Middle-Aged Adults With Hypertension by Individual Characteristics.
| Characteristic | All participants with hypertension, No. | Participants with ISH | Participants without ISH | ||
|---|---|---|---|---|---|
| No./total No. (%) | 95% CI | No./total No. (%) | 95% CI | ||
| Total participants | 235 138 | 62 819/235 138 (26.7) | 26.5-26.9 | 172 319/235 138 (73.3) | 73.1-73.5 |
| Age range, y | |||||
| 35-39 | 24 811 | 5455/24 811 (22.0) | 21.5-22.5 | 19 356/24 811 (78.0) | 77.5-78.5 |
| 40-44 | 69 907 | 17 705/69 907 (25.3) | 25.0-25.7 | 52 202/69 907 (74.7) | 74.4-75.0 |
| 45-49 | 140 420 | 39 659/140 420 (28.2) | 28.0-28.5 | 100 761/140 420 (71.8) | 71.5-72.0 |
| Sex | |||||
| Male | 110 245 | 21 402/110 245 (19.4) | 19.2-19.7 | 88 843/110 245 (80.6) | 80.4-80.8 |
| Female | 124 893 | 41 417/124 893 (33.2) | 32.9-33.4 | 83 476/124 893 (66.8) | 66.6-67.1 |
| Urbanity of residence | |||||
| Urban | 86 907 | 22 471/86 907 (25.9) | 25.6-26.2 | 64 436/86 907 (74.1) | 73.9-74.4 |
| Rural | 147 792 | 40 229/147 792 (27.2) | 27.0-27.5 | 107 563/147 792 (72.8) | 72.6-73.0 |
| Unknown | 439 | 119/439 (27.1) | 23.0-31.3 | 320/439 (72.9) | 68.7-77.1 |
| Geographic region of residence | |||||
| Eastern | 89 137 | 26 249/89 137 (29.4) | 29.2-29.8 | 62 888/89 137 (70.6) | 70.3-70.9 |
| Central | 64 007 | 16 544/64 007 (25.8) | 25.5-26.2 | 47 463/64 007 (74.2) | 73.8-74.5 |
| Western | 81 962 | 20 022/81 962 (24.4) | 24.1-24.7 | 61 940/81 962 (75.6) | 75.3-75.9 |
| Unknown | 32 | 4/32 (12.5) | 1.0-24.0 | 28/32 (87.5) | 76.0-99.0 |
| Educational level | |||||
| ≤Primary school | 72 373 | 21 978/72 373 (30.4) | 30.0-30.7 | 50 395/72 373 (69.6) | 69.3-70.0 |
| Middle school | 90 666 | 24 860/90 666 (27.4) | 27.1-27.7 | 65 806/90 666 (72.6) | 72.3-72.9 |
| High school | 38 438 | 9222/38 438 (24.0) | 23.6-24.4 | 29 216/38 438 (76.0) | 75.6-76.4 |
| ≥College | 30 458 | 5907/30 458 (19.4) | 19.0-19.8 | 24 551/30 458 (80.6) | 80.2-81.1 |
| Unknown | 3203 | 852/3203 (26.6) | 25.1-28.1 | 2351/3203 (73.4) | 71.9-74.9 |
| Employment status | |||||
| Employed | 208 813 | 55 624/208 813 (26.6) | 26.5-26.8 | 153 189/208 813 (73.4) | 73.2-73.6 |
| Unemployed | 5001 | 1072/5001 (21.4) | 20.3-22.6 | 3929/5001 (78.6) | 77.4-79.7 |
| Retired | 3321 | 1002/3321 (30.2) | 28.6-31.7 | 2319/3321 (69.8) | 68.3-71.4 |
| Homemaker | 13 494 | 4073/13 494 (30.2) | 29.4-31.0 | 9421/13 494 (69.8) | 69.0-70.6 |
| Unknown | 4509 | 1048/4509 (23.2) | 22.0-24.5 | 3461/4509 (76.8) | 75.5-78.0 |
| Occupation | |||||
| Farming | 107 347 | 31 355/107 347 (29.2) | 28.9-29.5 | 75 992/107 347 (70.8) | 70.5-71.1 |
| Nonfarming | 123 282 | 30 416/123 282 (24.7) | 24.4-24.9 | 92 866/123 282 (75.3) | 75.1-75.6 |
| Unknown | 4509 | 1048/4509 (23.2) | 22.0-24.5 | 3461/4509 (76.8) | 75.5-78.0 |
| Annual household income, yuana | |||||
| <10 000 | 35 334 | 9785/35 334 (27.7) | 27.2-28.2 | 25 549/35 334 (72.3) | 71.8-72.8 |
| 10 000-50 000 | 130 465 | 35 645/130 465 (27.3) | 27.1-27.6 | 94 820/130 465 (72.7) | 72.4-72.9 |
| >50 000 | 47 819 | 11 413/47 819 (23.9) | 23.5-24.3 | 36 406/47 819 (76.1) | 75.8-76.5 |
| Unknown | 21 520 | 5976/21 520 (27.8) | 27.2-28.4 | 15 544/21 520 (72.2) | 71.6-72.8 |
| Marital status | |||||
| Married | 225 107 | 60 357/225 107 (26.8) | 26.6-27.0 | 164 750/225 107 (73.2) | 73.0-73.4 |
| Widowed, separated, divorced, or single | 7371 | 1816/7371 (24.6) | 23.7-25.6 | 5555/7371 (75.4) | 74.4-76.4 |
| Unknown | 2660 | 646/2660 (24.3) | 22.7-25.9 | 2014/2660 (75.7) | 74.1-77.3 |
| Health insurance status | |||||
| Insured | 229 738 | 61 592/229 738 (26.8) | 26.6-27.0 | 168 146/229 738 (73.2) | 73.0-73.4 |
| Uninsured | 1913 | 483/1913 (25.3) | 23.3-27.2 | 1430/1913 (74.8) | 72.8-76.7 |
| Unknown | 3487 | 744/3487 (21.3) | 20.0-22.7 | 2743/3487 (78.7) | 77.3-80.0 |
| Medical history | |||||
| Myocardial infarction | 1341 | 234/1341 (17.4) | 15.4-19.5 | 1107/1341 (82.6) | 80.5-84.6 |
| Stroke | 3570 | 607/3570 (17.0) | 15.8-18.2 | 2963/3570 (83.0) | 81.8-84.2 |
| Diabetes | 37 228 | 8498/37 228 (22.8) | 22.4-23.3 | 28 730/37 228 (77.2) | 76.8-77.6 |
| Cardiovascular risk factors | |||||
| Current smoking | 57 406 | 10 742/57 406 (18.7) | 18.4-19.0 | 46 664/57 406 (81.3) | 81.0-81.6 |
| Current alcohol use | 57 591 | 10 355/57 591 (18.0) | 17.7-18.3 | 47 236/57 591 (82.0) | 81.7-82.3 |
| Obesity | 64 894 | 13 213/64 894 (20.4) | 20.1-20.7 | 51 681/64 894 (79.6) | 79.3-80.0 |
Abbreviation: ISH, isolated systolic hypertension.
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