Table 5.
The 16 possible combinations of PA reported for the four stages of life as recalled by interview during old age ≥65 years
| Combinations | Life stages used in generating the combinations for lifetime history of PA |
|||
|---|---|---|---|---|
| Old age (≥65 years) |
Late middle age (51–64 years) |
Early middle age (35–49 years) |
Young adulthood (20–34 years) |
|
| 0=no physical activity or <4 h per week; 1=physical activity ≥4 h per week |
||||
| 1 | 0 | 0 | 0 | 0 |
| 2 | 1 | 0 | 0 | 0 |
| 3 | 1 | 1 | 0 | 0 |
| 4 | 1 | 1 | 1 | 0 |
| 5 | 0 | 1 | 1 | 1 |
| 6 | 0 | 0 | 1 | 1 |
| 7 | 0 | 0 | 0 | 1 |
| 8 | 0 | 0 | 1 | 0 |
| 9 | 0 | 1 | 1 | 0 |
| 10 | 0 | 1 | 0 | 0 |
| 11 | 1 | 0 | 0 | 1 |
| 12 | 1 | 1 | 0 | 1 |
| 13 | 1 | 0 | 1 | 1 |
| 14 | 1 | 0 | 1 | 0 |
| 15 | 0 | 1 | 0 | 1 |
| 16 | 1 | 1 | 1 | 1 |