Table 2.

Comparative analysis of radiologic parameters by the the occurrence of proximal junctional kyphosis

	PJK +	PJK –	Total	p-value
Preop
SS	23.8 ± 10.9	24.8 ± 14.4	24.5 ± 13.6	0.68
PT	29.2 ± 9.1	28.1 ± 11.6	28.4 ± 11.0	0.56
PI	53.0 ± 11.2	52.7 ± 13.5	52.8 ± 12.9	0.91
LL	5.2 ± 22.8	6.9 ± 23.2	6.5 ± 23.0	0.68
PI–LL	47.8 ± 24.6	46.1 ± 23.0	46.5 ± 23.4	0.68
SVA	171.1 ± 86.2	177.1 ± 80.7	175.6 ± 81.9	0.70
PJA	2.1 ± 5.2	2.7 ± 5.9	2.5 ± 9.5	0.58
Postop
SS	24.7 ± 9.3	26.1 ± 9.6	25.7 ± 9.5	0.45
PT	28.8 ± 8.9	25.4 ± 8.8	26.3 ± 8.9	0.04
PI	53.6 ± 11.0	51.5 ± 12.0	52.0 ± 11.7	0.34
LL	39.8 ± 9.4	35.5 ± 10.7	36.6 ± 10.5	0.03
PI–LL	13.8 ± 11.3	15.9 ± 10.9	15.4 ± 11.0	0.30
SVA	66.2 ± 41.2	59.4 ± 42.4	61.2 ± 42.2	0.39

SS, sacral slope; PT, pelvic tilt; PI, pelvic incidence; LL, lumbar lordosis; PI–LL, pelvic incidence minus lumbar lordosis; SVA, sagittal vertical axis

p-value < 0.05 are shown in bold