Table 3.

Relationships between postoperative complications and changes in radiological parameters.

Item	Stage	Without complicationa	With complication
			Case 1	Case 2	Case 3
Pelvic incidence	Preoperative	49.45 [47.12, 55.15]	49.9	37.9	35.8
Cobb angle (º)	Preoperative	7.30 [4.80, 14.68]	32.2	23.6	16.6
	After 1st operation	5.50 [1.77, 7.97]	22	19.6	7.5
	After 2nd operation	6.55 [1.20, 8.12]	19.3	16.9	8.2
Lumbar lordosis (º)	Preoperative	23.10 [10.22, 30.60]	−6.6	−9.9	−5.5
	After 1st operation	27.35 [19.72, 34.08]	10	10.5	13.2
	After 2nd operation	28.10 [21.27, 31.93]	11.1	18.8	18
PI-LL	Preoperative	30.80 [17.38, 38.73]	43.3	47.8	51.3
	After 1st operation	18.95 [14.80, 28.73]	23.0	24.4	22.9
	After 2nd operation	22.45 [12.98, 26.55]	19.8	23.2	20.9
L1–L2 angle (º)	Preoperative	0.30 [−5.45, 2.88]	−8.3	−6.8	−15.3
	After 1st operation	2.80 [1.23, 4.25]	−8.5	−8.3	−4
	After 2nd operation	1.55 [0.73, 4.17]	−10	−7.1	−7.2

Bold values indicate notable data.

^aData are shown as median [interquartile range].