Table 2.

Comparisons of sagittal parameters between the two subgroups and between the spondylolysis group and the control group (°, mean ± SD)

Parameters	Subgroup A (n = 36)	Subgroup B (n = 16)	Spondylolysis Group (n = 52)	Control group (n = 207)	P1	P2
PI	49.61 ± 10.90	48.94 ± 9.49	49.40 ± 10.40	41.84 ± 7.71	0.832	<0.001
PT	14.81 ± 6.60	13.64 ± 4.23	14.45 ± 5.95	10.98 ± 7.47	0.518	0.001
SS	34.70 ± 9.41	34.90 ± 9.60	34.76 ± 9.38	30.86 ± 7.35	0.946	0.007
LL	40.45 ± 13.38	40.94 ± 11.84	40.60 ± 12.81	35.86 ± 10.87	0.901	0.007
L5I	20.37 ± 8.76	22.08 ± 7.96	20.90 ± 8.48	18.57 ± 6.60	0.507	0.069
L5S	14.63 ± 8.53	16.71 ± 7.93	15.27 ± 8.33	13.97 ± 6.41	0.412	0.296
STA	98.12 ± 5.09	99.40 ± 5.24	98.51 ± 5.12	102.67 ± 4.80	0.413	<0.001

A value of P < 0.05 was considered significant. P1: comparisons between Subgroup A and Subgroup B, P2: comparisons between the spondylolysis group and the control group. PI: Pelvic incidence; PT: Pelvic tilt; SS: Sacral slope; LL: Lumbar lordosis; L5I: L5 incidence; L5S: L5 slope; STA: Sacral table angle; SD: Standard deviation.