Dissatisfaction Risk Factors of Patients after Laminectomy for Thoracic Ossification of Ligamentum Flavum: A Retrospective Cohort Study of Different Follow-Up Periods

Table 2

Modified Japanese Orthopaedic Association (JOA) scoring system for the assessment of thoracic myelopathy (total score 11 points).

Functional score
Motor function: lower limb
0	Unable to walk.
1	Support was needed to walk on flat ground.
2	Need a cane or aid on flat ground.
3	Walking on flat ground or upstairs did not require support, but the lower limbs were not flexible.
4	Normal.
Sensory function: lower limb
0	Obvious sensory impairment.
1	Mild sensory impairment or numbness.
2	Normal.
Sensory function: trunk
0	Obvious sensory impairment.
1	Mild sensory impairment or numbness.
2	Normal.
Bladder function
0	Uroschesis.
1	Highly dysuria, laborious, irretention, or incontinence.
2	Mild dysuria, frequent urination, hesitation in urination.
3	Normal.