Table 1.
Baseline sample descriptive statistics (N = 16,258).
| Variable | Total Mean/% |
Aged 45–59 Years Mean/% |
Aged 60 + Mean/% |
p Value for Age Group Difference |
|---|---|---|---|---|
| Mental intactness | 6.4 (2.9) | 6.8 (2.7) | 5.9 (3.1) | <0.001 |
| Episodic memory | 3.5 (1.7) | 3.8 (1.7) | 3.1 (1.7) | <0.001 |
| Early paternal death | <0.001 | |||
| No | 84.9 | 88.9 | 78.7 | |
| Yes | 15.1 | 11.1 | 21.3 | |
| Early maternal death | <0.001 | |||
| No | 90.1 | 93.1 | 85.7 | |
| Yes | 9.9 | 6.9 | 14.3 | |
| Paternal education | <0.001 | |||
| Illiterate | 59.1 | 54.3 | 65.9 | |
| Able to read or write | 40.9 | 45.7 | 34.1 | |
| Paternal employment | <0.001 | |||
| Agricultural | 80.4 | 78.5 | 83.2 | |
| Non-agricultural | 19.6 | 21.5 | 16.8 | |
| Food adequacy | <0.001 | |||
| Yes | 29.3 | 32.1 | 25.4 | |
| No | 70.7 | 67.9 | 74.6 | |
| Childhood self-rated health | 0.06 | |||
| Healthy | 35.2 | 35.6 | 34.6 | |
| Average | 51.6 | 50.9 | 52.7 | |
| Less healthy | 13.2 | 13.5 | 12.7 | |
| Age | 59 (9.5) | 52 (4.5) | 68 (6.5) | / |
| Gender | / | |||
| Male | 48.6 | 47.7 | 49.9 | |
| Female | 51.4 | 52.3 | 50.1 | |
| Adulthood education | 3.3 (1.9) | 3.7 (1.9) | 2.8 (1.8) | <0.001 |
| Marital status | <0.001 | |||
| Married | 87.7 | 94.4 | 79.2 | |
| Not married | 12.3 | 5.6 | 20.8 | |
| Living areas | 0.30 | |||
| Rural | 63.4 | 63.0 | 63.9 | |
| Urban | 36.6 | 37.0 | 36.1 | |
| ADL limitation | <0.001 | |||
| Yes | 16.3 | 10.7 | 23.5 | |
| No | 83.7 | 89.3 | 76.5 | |
| Adulthood physical injury | 0.45 | |||
| Yes | 8.5 | 8.4 | 8.7 | |
| No | 91.5 | 91.6 | 91.3 | |
| Number of chronic diseases | 1.5 (1.4) | 1.3 (1.3) | 1.7 (1.5) | <0.001 |
| Current smoker | <0.001 | |||
| No | 60.1 | 61.8 | 58.0 | |
| Yes | 39.9 | 38.2 | 42.0 | |
| Current drinker | <0.001 | |||
| No | 66.6 | 64.4 | 69.4 | |
| Yes | 33.4 | 35.6 | 30.6 |