Table 1.

Comparisons of each item between JOA sub-score for lower extremity and tandem gait grade.

Score/grade	JOA sub-score (lower extremities)	Tandem gait grade
0	Impossible to walk	Impossible to walk
1	Needs cane or assistance on flat surface	≤ 3 steps
2	Needs assistance on stairs	< 10 steps
3	Walks unaided, but slowly	10 steps, unstable/sway
4	Normal	10 steps, normal