Table 1.
Differences in general characteristics of subjects by age group.
| Variables | 65–74 Age Group (n = 4942) |
≥75 Age Group (n = 3246) |
χ2/t(p) | |
|---|---|---|---|---|
| N (%) or Mean ± SD | ||||
| Sex | Men | 1942 (39.3) | 1288 (39.7) | 0.12 (0.729) |
| Women | 3000 (60.7) | 1958 (60.3) | ||
| Age (years) | 69.0 ± 2.79 | 80.1 ± 4.01 | −136.78 (<0.001) |
|
| Educational level | ≤Elementary education | 1381 (27.9) | 2241 (69.0) | 1343.10 (<0.001) |
| Secondary education | 3241 (65.6) | 898 (27.7) | ||
| ≥Higher education | 320 (6.5) | 107 (3.3) | ||
| Religion | Do not have | 1988 (40.2) | 1382 (42.6) | 4.46 (0.035) |
| Have | 2954 (59.8) | 1864 (57.4) | ||
| Living arrangement | Living alone | 1487 (30.1) | 1630 (50.2) | 336.62 (<0.001) |
| Living with spouse only | 3455 (69.9) | 1616 (49.8) | ||
| Residential area | Capital area | 1371 (27.7) | 452 (13.9) | 291.08 (<0.001) |
| Big cities | 1516 (30.7) | 894 (27.5) | ||
| Rural area | 2055 (41.6) | 1900 (58.5) | ||
| Independence in daily life |
Do not need | 4682 (94.7) | 2698 (83.1) | 297.49 (<0.001) |
| Need | 260 (5.3) | 548 (16.9) | ||
| Perceived health status (Range: 1–5) | 3.5 ± 0.80 | 3.0 ± 0.89 | 27.43 (<0.001) |
|
| Perceived health status of spouse (Range: 1–5) | 3.6 ± 0.78 | 3.2 ± 0.89 | 16.72 (<0.001) |
|
| Housing ownership | Own one’s house | 4026 (81.5) | 2492 (76.8) | 26.58 (<0.001) |
| Other | 916 (18.5) | 754 (23.2) | ||
| Annual household income * | 2771.3 ± 3592.17 | 1523.1 ± 1668.90 | 21.19 (<0.001) |
|
| Number of surviving children | 2.4 ± 1.08 | 3.4 ± 1.50 | −31.72 (<0.001) |
|
| Number of surviving grandchildren | 3.5 ± 2.38 | 5.6 ± 3.32 | −30.15 (<0.001) |
|
| Number of intimate kinships | 2.3 ± 1.95 | 1.7 ± 1.82 | 14.63 (<0.001) |
|
| Number of friends | 3.2 ± 2.76 | 2.8 ± 2.32 | 7.90 (<0.001) |
|
* Korean won, tens of thousands; SD: Standard deviation