Table 2.

Neurological impairment score in lumbar spinal stenosis (NIS-LSS)

Tendon reflexes
Patellar reflex, Achilles tendon reflex, each evoked reflex 1 point	(0–4 points)
Tactile sensation in lower limbs
Bilaterally normal 4 points
Unilateral abnormal 2 points
Bilaterally abnormal 0 point
	(0–4 points)
Vibration sensation in lower limbs (external ankle)
Bilaterally normal 4 points
Unilateral abnormal 2 points
Bilaterally abnormal 0 point
	(0–4 points)
Presence of paresis—stand on tiptoe, stand on heels, squat
Every exercise in one lower limb 1.5 points
	(0–9 points)
Walk + run
Ability to run 12 points
Walk without support 9 points
Walk with support of one crutch 6 points
Walk with support of two crutches 3 points
Inability to walk 0 point
	(0–12 points)
Total	(0–33 points)