Table 1 Demographic characters

N (individual)

1288

815

724

6819

Household size

3.1

3.0

2.9

3.1

 Men

448 (34.8%)

255 (31.3%)

279 (38.5%)

2429 (35.6%)

 Women

840 (65.2%)

560 (68.7%)

445 (61.5%)

4390 (64.4%)

Age group##

**

**

**

**

 60–69

538 (41.8%)

356 (43.7%)

321 (44.3%)

3943 (57.8%)

 70–79

457 (35.5%)

322 (39.5%)

233 (32.2%)

2015 (29.5%)

 80+

293 (22.7%)

137 (16.8%)

170 (23.5%)

861 (12.6%)

Marital status††##

**

**

 Single or widowed

562 (43.6%)

319 (39.1%)

233 (32.2%)

1827 (26.8%)

 Married

721 (56.0%)

490 (60.1%)

488 (67.4%)

4983 (73.1%)

 Others

5 (0.4%)

6 (0.7%)

3 (0.4%)

9 (0.1%)

Highest education††##

**

**

**

**

 None and primary

1009 (78.4%)

600 (73.7%)

430 (59.4%)

4539 (66.6%)

 Secondary

267 (20.7%)

194 (23.8%)

231 (31.9%)

2147 (31.5%)

 College and above

11 (0.9%)

20 (2.5%)

63 (8.7%)

133 (2.0%)

Per capita annual income (CNY, mean) ††##

6296**

8352**

14,151**

12,260**

Per capita annual income (CNY, median)

5000

7200

11,064

10,213

EQ-5D

0.867

0.874

0.881

0.889

Difficulty in self-care in the past month

254 (19.7%)

150 (18.4%)

109 (15.1%)

864 (12.7%)

Income resource††##

**

**

**

**

 Own

608 (47.2%)

460 (56.4%)

448 (61.9%)

4653 (68.2%)

 Others

680 (52.8%)

355 (43.6%)

276 (38.1%)

2166 (31.8%)