Table 2 Characteristics of the study participants (N = 1,542)
Index | Older adults (people (%)) | Scorea\(\left(\overline{x}\pm s\right)\) | t/F | P |
|---|---|---|---|---|
Age (years) | ||||
 65 ≤ Age < 70 | 703 (45.59) | 42.43 ± 1.55 | 2.891 | 0.021 |
 70 ≤ Age < 75 | 433 (28.08) | 42.67 ± 1.45 | ||
 75 ≤ Age < 80 | 206 (13.36) | 42.67 ± 1.45 | ||
 80 ≤ Age < 85 | 147 (9.53) | 42.62 ± 1.51 | ||
 Age >  = 85 | 53 (3.44) | 42.91 ± 1.39 | ||
Sex | ||||
 Male | 764 (49.55) | 42.32 ± 1.49 | -6.332 |  < 0.001 |
 Female | 778 (50.45) | 42.80 ± 1.49 | ||
Residence | ||||
 Rural | 863 (55.97) | 41.79 ± 1.27 | -27.924 |  < 0.001 |
 Urban | 679 (44.03) | 43.55 ± 1.17 | ||
Education level | ||||
 Illiteracy | 360 (23.35) | 41.98 ± 1.38 | 73.678 |  < 0.001 |
 Primary school | 600 (38.91) | 42.22 ± 1.42 | ||
 Junior high school | 305 (19.78) | 42.98 ± 1.37 | ||
 High school/Technical school | 157 (10.18) | 43.50 ± 1.44 | ||
 College degree and above | 120 (7.78) | 43.79 ± 1.12 | ||
Pre-retirement occupationb | ||||
 Government staffs | 349 (22.63) | 43.52 ± 1.30 | 295.453 |  < 0.001 |
 Industry and service workers | 280 (18.16) | 43.52 ± 1.14 | ||
 Agricultural sector or others | 913 (59.21) | 41.91 ± 1.31 | ||
Marital status | ||||
 Unmarried | 25 (1.62) | 42.25 ± 1.62 | 1.563 | 0.210 |
 Married | 1155 (74.90) | 42.60 ± 1.50 | ||
 Divorced, widowed and others | 362 (23.48) | 42.47 ± 1.51 | ||
Medical insurancec | ||||
 Basic Medical Insurance for Urban Employeesd | 512 (33.20) | 43.57 ± 1.19 | 223.095 |  < 0.001 |
 Basic Medical Insurance for Residentse | 996 (64.59) | 42.05 ± 1.39 | ||
 Others | 34 (2.21) | 42.53 ± 1.43 | ||