Table 1.
Mean (SD) for young subjects who recovered versus old subjects who fell. 95% Confidence Interval values are for the difference between the two groups.
| young non-fallers (n=30) | old fallers (n=18) | 95% CI | |
|---|---|---|---|
| At slip initiation | |||
| pre-slip walking velocity (cm/s) | 133 (15) | 133 (13) | −8.9 – 8.9 |
| pre-slip heelstrike velocity (cm/s) | 89.4 (52.1) | 90.6 (40.1) | −29.3 – 31.7 |
| post-slip heelstrike velocity (cm/s) | 137.4 (71.0) | 122.6 (59.2) | −58.3 – 28.6 |
| During slip | |||
| slip distance (cm) | 19.6 (13.7) | 39.8 (11.1) | 12.6 – 27.9 |
| peak slip velocity (cm/s) | 139.5 (63.8) | 236.5 (33.0) | 68.7 – 125.2 |
| peak slip acceleration (cm/s2) | 1207.9 (702.0) | 2074.7 (657.5) | 455.1– 1278.4 |
| At/after recovery | |||
| trunk extension velocity at recovery+133 ms (deg/s) | −17.0 (112.4) | 47.7 (104.1) | 0.9 – 130.4 |
| slip foot velocity relative to COM velocity (cm/s)* | −50.9 (77.7) | 77.6 (48.6) | 91.9 – 165.3 |
| reaction time (s) | 0.27 (0.06) | 0.31 (0.17) | −0.10 – 0.02 |
| posterior distance from recovery foot to COM (cm) | −2.3 (37.3) | 20.2 (17.3) | 5.7 – 39.6 |
| lateral distance from recovery foot to COM (cm)* | 0.7 (11.6) | 9.3 (5.0) | 3.7 – 13.5 |
*
variable included in logistic regression function