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Table 2 Radiological parameters

From: Correction of marked sagittal deformity with circumferential minimally invasive surgery using oblique lateral interbody fusion in adult spinal deformity

 

Before surgery

24 months after surgery

Whole

OLIF51

TLIF51

Whole

OLIF51

TLIF51

SVA (mm)

125.7 ± 21.1

125.9 ± 21.3

125.5 ± 22.1

29.5 ± 14.8‡

27.1 ± 11.4

32.7 ± 18.4

PT (°)

33.0 ± 7.2

31.4 ± 7.2

35.1 ± 7.0

18.1 ± 5.7‡

17.6 ± 4.6

18.6 ± 7.6

PI (°)

53.7 ± 6.4

53.2 ± 6.0

54.4 ± 7.1

53.6 ± 6.5

53.0 ± 6.0

54.4 ± 7.2

LL (°)

18.2 ± 9.0

16.7 ± 10.4

20.3 ± 6.8

51.7 ± 5.8‡‡

(39.4–62.4)

55.5 ± 2.8***

(50.0–62.4)

46.9 ± 5.2

(39.4–52.6)

LLL (°)

9.5 ± 4.0

9.0 ± 4.6

10.2 ± 3.3

27.2 ± 4.8‡‡

31.1 ± 1.4***

22.3 ± 2.4

LLL/LL (%)

49.4 ± 17.4

47.5 ± 18.2

51.9 ± 17.0

52.5 ± 5.5

56.2 ± 2.1***

47.8 ± 4.9

PI-LL (°)

35.5 ± 9.4

36.5 ± 8.5

34.1 ± 10.6

5.3 ± 3.6‡‡

(1.0–10.6)

3.6 ± 3.0**

(1.0–10.6)

7.5 ± 3.2

(3.5–10.0)

dSVA (mm)

–

–

–

96.2 ± 23.4

(55.3–141.5)

98.9 ± 22.9

92.8 ± 24.8

dLL (°)

–

–

–

33.4 ± 11.5

(10.0–67.5)

38.7 ± 10.2**

(32.3–67.5)

26.6 ± 9.8

(10.0–39.9)

Mean DA (°)

 L2-L5

4.1 ± 3.5

3.4 ± 4.1

5.0 ± 2.4

12.4 ± 1.5‡‡

(8.1–16.7)

12.5 ± 1.6

12.3 ± 1.4

 L5-S1

8.7 ± 3.5

9.8 ± 3.6

7.5 ± 2.3

12.9 ± 6.7‡

(3.5–27.9)

18.4 ± 3.7***

(14.5–27.9)

6.9 ± 2.8

(3.5–10.7)

  1. OLIF oblique lateral interbody fusion, TLIF transforaminal lumbar interbody fusion, SVA sagittal vertical axis, TK thoracic kyphosis, PT pelvic tilt, PI pelvic incidence, LL lumbar lordosis at L1–S1, LLL lumbar lordosis at L4–S1, LLL/LL LLL/LL × 100 (%), dSVA difference between pre- and postoperative values of SVA, dLL difference between pre- and postoperative values of LL, DA disc angle
  2. ‡p < 0.01 and ‡‡p < 0.001 compared to before surgery, **p < 0.01 and ***p < 0.001 compared to TLIF51 group
  3. No significant difference in the preoperative values between the TLIF51 and OLIF51 groups