Table 4.

Radiological findings

	Overall	One level (n = 69)	Two level (n = 40)	Three levels or more (n = 18)
Disc height (mm)
Pre-operation	9.17 ± 0.46	9.60 ± 0.61	8.52 ± 0.78	8.90 ± 1.45
Post-operation	11.98 ± 0.43	12.36 ± 0.58	11.41 ± 0.73	11.76 ± 1.37
Final follow-up	10.81 ± 0.40	10.90 ± 0.56	10.61 ± 0.65	10.96 ± 1.38
Segmental lordotic angle (°)
Pre-operation	15.22 ± 1.83	11.57 ± 2.01	18.82 ± 3.49	22.92 ± 5.43
Post-operation	19.37 ± 1.44	16.20 ± 1.54	22.50 ± 2.68	26.07 ± 4.14
Final follow-up	17.49 ± 1.35	14.50 ± 1.46	20.60 ± 2.49	23.35 ± 4.02
Lumbar lordotic angle (°)
Pre-operation	34.14 ± 2.23	35.43 ± 3.97	32.22 ± 3.89	34.14 ± 8.24
Post-operation	42.65 ± 1.18	44.13 ± 2.26	40.47 ± 3.74	41.64 ± 7.45
Final follow-up	36.69 ± 2.03	42.05 ± 2.12	36.25 ± 4.03	37.92 ± 7.74