Hounsfield units in assessing bone mineral density in ankylosing spondylitis patients with cervical fracture-dislocation

Table 1 Demographics and clinical data of 51 ankylosing spondylitis patients with cervical spine fracture-dislocation

Feature	Male, n = 44	Female, n = 7	Total, n = 51
Age (years)	55.14	59.57	55.4
Injury level
C1/2	5 (11.36)	0 (0)	5 (9.80)
C2/3	2 (4.55)	0 (0)	2 (3.92)
C3/4	2 (4.55)	0 (0)	2 (3.92)
C4/5	5 (11.36)	1 (14.28)	6 (11.76)
C5/6	13 (29.54)	3 (42.86)	16 (31.37)
C6/7	17 (38.64)	3 (42.86)	20 (39.23)
ASIA grade
A	2 (4.55)	1 (14.28)	3 (5.88)
B	5 (11.36)	2 (28.58)	7 (13.73)
C	14 (31.82)	3 (42.86)	17 (33.33)
D	23 (52.27)	1 (14.28)	24 (47.06)

Data are n (%). ASIA: American Spinal Injury Association.