Table 2. Comparisons of sagittal and coronal radiographic data between the two groups.

	ALIF	OLIF	P—value
Thoracic kyphosis (°)
Preoperation	24.2±16.8	23.3±12.3	0.182
Postoperation	32.5±12.9	25.6±12.9	0.248
Final follow up	36.2±15.0	28.0±10.8	0.449
p value (pre-final)	<0.001	<0.001
Lumbar lordosis(°)
Preoperation	30.5±15.3	28.3±23.9	0.865
Postoperation	49.5±13.9	50.2±19.5	0.208
Final follow up	48.5±13.4	48.7±20.9	0.484
p value (pre-final)	<0.001	<0.001
PI (°)
Preoperation	52.1±12.6	51.7±6.6	0.863
Postoperation	53.8±12.9	52.2±5.9	0.759
Final follow up	53.6±10.6	52.4±5.6	0.768
p value (pre-final)	0.148	0.672
PT (°)
Preoperation	25.6±11.4	24.8±9.6	0.339
Postoperation	17.2±9.2	17.4±5.9	0.787
Final follow up	18.9±9.4	17.6±6.0	0.674
p value (pre-final)	<0.001	<0.001
PI-LL mismatch (°)
Preoperation	21.6±20.4	23.4±22.6	0.412
Postoperation	4.3±9.7	2.0±10.3	0.306
Final follow up	5.1±10.8	3.7±11.6	0.262
p value (pre-final)	<0.001	<0.001
SVA (mm)
Preoperation	75.5±52.0	77.3±58.2	0.287
Postoperation	22.1±46.6	20.4±46.2	0.272
Final follow up	29.8±47.9	25.3±48.4	0.189
p value (pre-final)	<0.001	<0.001
Lumbar Cobb angle (°)
Preoperation	23.8±11.8	25± 9.6	0.529
Postoperation	9.8±8.9	9.4±7.7	0.552
Final follow up	10.2±9.0	9.6±7.8	0.424
p value (pre-final)	<0.001	<0.001