Table 2.

Details of the patients

	Normal (n = 40)	Range	AS (n = 107)	Range	P value
Gender (F/M)	9/31		18/89		0.5810
Age	41.0 ± 10.6	20 to 55	42.4 ± 10.7	19 to 60	0.4838
Sagittal vertical axis	−12.6 ± 22.7	−49 to 30	27.5 ± 51.9	−46 to 131	<0.001
Sacral slope	35.5 ± 5.9	22 to 47	23.5 ± 8.6	6 to 47	<0.001
Pelvic tilt	13.5 ± 6.0	3 to 23	20.0 ± 8.8	7 to 42	<0.001
Pelvic incidence	48.3 ± 5.5	32 to 55	43.0 ± 10.7	14 to 70	0.0036
Lumbar lordosis	39.3 ± 6.8	21 to 52	28.0 ± 9.1	11 to 63	<0.001
Thoracic kyphosis	38.4 ± 6.7	23 to 51	37.6 ± 13.3	16 to 61	0.7391