Table 2.

Clinical Features of Patients With Thoracic Myelopathy

Disease
OLF	48 (16%)
OPLL	30 (10%)
OPLL + OLF	27 (9%)
IET	98 (32.7%)
IMSCT	64 (21.3%)
VT	17 (5.7%)
SCH	7 (2.3%)
VF	4 (1.3%)
TDH	5 (1.7%)
Affected level
Upper	68 (22.6%)
Middle	103 (34.2%)
Lower	129 (42.9%)
Initial/preoperative symptoms
Girdle pain	19 (6.3%)/22 (7.3%)
Back pain	49 (16.3%)/58 (19.3%)
Low back pain	66 (21.9%)/82 (27.2%)
Leg numbness	159 (52.8%)/242 (80.2%)
Leg pain	49 (16.3%)/66 (21.9%)
Gait disturbance	78 (25.9%)/193 (64.1%)
Leg paresis	21 (7%)/102 (33.9%)
BBD	9 (3%)/27 (9%)
Neurologic findings
PTR	196 (65.1%)
ATR	179 (59.5%)
Ankle clonus	122 (40.5%)

ATR = ankle tendon reflex, BBD = bowel bladder disturbance, IET = intradural extramedullary tumor, IMSCT = intramedullary spinal cord tumor, OLF = ossification of the ligamentum flavum, OPLL = ossification of the posterior longitudinal ligament, PTR = patellar tendon reflex, SCH = spinal cord herniation, TDH = thoracic disk herniation, VF = vertebral fracture, VT = vertebral tumor