Table 2 American Spinal Injury Association (ASIA) Impairment Scale (AIS) Score at Diagnosis and at Last Follow Up

A

Complete

No motor or sensory function is preserved in the sacral segments S4–S5

38/153 (25%)

3/148 (2%)

B

Incomplete

Sensory but no motor function is preserved below the neurological level and includes the sacral segments S4–S5

26/153 (17%)

8/148 (5.5%)

C

Incomplete

Motor function is preserved below the neurological level, and more than half of key muscles below the neurological level have a muscle grade less than 3

51/153 (33.5%)

14/148 (9.5%)

D

Incomplete

Motor function is preserved below the neurological level, and at least half of key muscles below the neurological level have a muscle grade of 3 or more

19/153 (12.5%)

27/148 (18%)

E

Normal

Motor and sensory function are normal

17/153 (11%)

96/148 (65.5%)