Numbers at risk according to the tertiles of the walk-velocity parameter at different survival time points
| Number at risk | Survival days | ||||
| 0 | 500 | 1000 | 1500 | 2000 | |
| Highest tertile | 9 | 7 | 4 | 4 | 2 |
| Middle tertile | 10 | 4 | 2 | 2 | 1 |
| Lowest tertile | 9 | 3 | 0 | 0 | 0 |
Data are presented as n.