Table 1.

Patient characteristics.

Characteristic	Value	Percent
No. of patients	49
Age in years: mean ± sem	41.1 ± 2.1
Sex: male, female	39, 10	79.6, 20.4
Level: cervical, thoracic	27, 22	55.1, 44.9
Surgery: posterior, anterior, both	41, 0, 8	83.7, 0, 16.3
Injury to surgery: hours mean ± sem	36.4 ± 2.7
Monitoring: hours mean ± sem	121.2 ± 5.9
Admission AIS grade: A, B, C	34, 7, 8	67.3, 14.3, 18.4
Follow-up AIS grade: A, B, C, D, E	26, 4, 6, 12, 1	53.1, 8.2, 12.2, 24.5, 2.0
Months follow-up: mean ± sem	17.2 ± 2.3