Table 6. Clinical stage of foot drop caused by lumbar degenerative disease.

Factor	Weight
	0	1	2	3	4	5	6
Duration of palsy (days)	>180	150-180	120-150	90-120	60-90	30-60	<30
Preop muscle strength of TA	0	1	2	3
Age (yrs)	>60	55-60	50-55	45-50	<45

TA= tibialis anterior

Early Stage: 10-13, Good recovery

Middle Stage: 5-9, Incomplete recovery

Late Stage: 0-4, Poor recovery