Table 1.
General characteristics of 10 740 included participants
| Characteristics | Overall (n=10 740) | Cognitive impairment | P value | |
| Yes (n=1789) | No (n=8951) | |||
| Age (years, mean, SD) | 69.5 (7.6) | 73.6 (8.6) | 68.7 (7.1) | <0.01 |
| Gender (N, %) | <0.01 | |||
| Man | 5010 (46.6) | 680 (38.0) | 4330 (48.4) | |
| Women | 5730 (53.4) | 1109 (62.0) | 4621 (51.6) | |
| Race (N, %) | <0.01 | |||
| Han ethnicity | 10 351 (96.6) | 1699 (95.1) | 8652 (96.9) | |
| Minority | 362 (3.4) | 87 (4.9) | 275 (3.1) | |
| Education level (N, %) | <0.01 | |||
| <Primary | 5165 (48.2) | 1058 (59.2) | 4107 (46.0) | |
| Primary | 4573 (42.7) | 578 (32.4) | 3995 (44.8) | |
| Junior middle | 831 (7.8) | 132 (7.4) | 699 (7.8) | |
| Senior middle | 122 (1.1) | 16 (0.9) | 106 (1.2) | |
| College and higher | 18 (0.2) | 2 (0.1) | 16 (0.2) | |
| Marital status (N, %) | <0.01 | |||
| Single | 176 (1.6) | 39 (2.2) | 137 (1.5) | |
| Married | 7988 (74.4) | 1066 (59.6) | 6922 (77.4) | |
| Divorced/widowed | 2571 (23.9) | 683 (38.2) | 1888 (21.1) | |
| Family income (N, %) | ||||
| ≤10 000 CNY | 1303 (12.1) | 397 (22.2) | 906 (10.1) | <0.01 |
| 10,001–20 000 CNY | 2032 (18.9) | 398 (22.3) | 1634 (18.3) | |
| 20,001–50 000 CNY | 3899 (36.3) | 542 (30.3) | 3357 (37.5) | |
| 50,001–100 000 CNY | 1955 (18.2) | 272 (15.2) | 1683 (18.8) | |
| >100 000 CNY | 1548 (14.4) | 179 (10.0) | 1369 (15.3) | |
| Smoking (N, %) | <0.01 | |||
| Never | 7765 (72.3) | 1438 (80.4) | 6327 (70.7) | |
| Past | 2046 (19.1) | 242 (13.5) | 1804 (20.2) | |
| Current | 929 (8.6) | 109 (6.1) | 820 (9.2) | |
| Alcohol drinking (N, %) | <0.01 | |||
| Never | 7445 (69.3) | 1337 (74.7) | 6108 (68.2) | |
| Current | 2692 (25.1) | 345 (19.3) | 2347 (26.2) | |
| Past | 602 (5.6) | 107 (6.0) | 495 (5.5) | |
| BMI (kg/m2, mean, SD) | 23.3 (3.3) | 23.0 (3.5) | 23.4 (3.2) | <0.01 |
| Physical activity (yes, N, %) | 2476 (23.1) | 327 (18.3) | 2149 (24.0) | <0.01 |
| Hypertension (presence, N, %) | 4741 (44.1) | 855 (47.8) | 3886 (43.4) | <0.01 |
| Diabetes (presence, N, %) | 977 (9.1) | 162 (9.1) | 815 (9.1) | 0.95 |
| CHD (presence, N, %) | 340 (3.2) | 64 (3.6) | 276 (3.1) | 0.28 |
| PHQ-9 scores (mean, SD) | 1.5 (2.7) | 2.3 (3.6) | 1.4 (2.5) | <0.01 |
| ADL scores (mean, SD) | 99.2 (5.4) | 97.3 (11.2) | 99.6 (3.1) | <0.01 |
Data for the following are missing: one for age, 27 for race, 31 for education, five for marital status, three for family income, one for smoking, one for alcohol drinking, two for BMI, one for physical activity, one for diabetes, five for PHQ-9 scores.
ADL, activities of daily living scale; BMI, body mass index; CHD, coronary heart disease; CNY, Chinese Yuan; PHQ-9, patient health questionnaire-9 scale;.