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Table 3 Radiological outcome measures

From: Does minimally invasive transforaminal lumbar interbody fusion (MIS-TLIF) influence functional outcomes and spinopelvic parameters in isthmic spondylolisthesis?

  Baseline Postoperative Test p value (Sig.)
6 weeks 6 months final  
Pelvic incidence (PI)
Mean ± SD 61.83 ± 8.77 61.78 ± 8.88 61.61 ± 8.90 61.61 ± 8.99 1.654* 0.196
Median (range) 62.15 (50.2–77.9) 62.15 (50.3–78) 62.15 (49.7–78.1) 62.15 (49–78.1)
Pelvic tilt (PT)
Mean ± SD 21.07 ± 8.74 26.42 ± 5.99 21.12 ± 5.20 19.84 ± 4.20 36.620‡  < 0.001 (HS)
Median (range) 20.6 (8–32.9) 28.35 (15–35) 19.25 (13–31.5) 19.45 (12.3–27)
Sacral slope (SS)
Mean ± SD 40.72 ± 7.03 35.62 ± 6.01 40.69 ± 5.73 41.98 ± 6.19 22.410*  < 0.001 (HS)
Median (range) 40.70 (25.9–54) 34.90 (23–45.9) 40.90 (32.2–50) 42.6 (32.1–52.9)
Lumbar lordosis (LL)
Mean ± SD 57.23 ± 9.23 54.87 ± 6.88 57.78 ± 7.20 57.94 ± 6.83 7.213‡ 0.047 (S)
Median (range) 56.35 (40–73) 57.15 (42–65.1) 58 (44.9–68.4) 59 (47.4–68.9)
Slip (%)
Mean ± SD 23.13 ± 8.09 5.13 ± 3.97 5.98 ± 4.71 6.48 ± 5.58 53.27‡  < 0.001 (HS)
Median (range) 23.5 (5–42) 4 (1–16) 4.5 (1.8–18) 4.5 (1.8–23)
Mismatch
Mean ± SD 10.33 ± 7.48 7.67 ± 4.90 6.31 ± 2.85 6.21 ± 2.85 4.513‡ 0.211
Median (range) 8.55 (0–23.7) 7.20 (0.1–18) 7.30 (1–9.9) 7.10 (0.1–9.9)
L1–L4
Mean ± SD 30.10 ± 8.02 27.41 ± 7.21 27.88 ± 7.29 27.65 ± 6.56 12.443‡ 0.006 (S)
Median (range) 30.80 (15.6–41) 28.95 (13.7–34.2) 28.80 (15.7–41.1) 27.50 (17.2–38.6)
L4–S1
Mean ± SD 35.07 ± 6.47 37.55 ± 5.09 37.92 ± 4.2 38.88 ± 4.24 12.602*  < 0.001 (HS)
Median (range) 34.15 (23.8–45) 38 (27.9–44.5) 38.50 (32–45) 39.15 (31.2–45.2)
Segmental lordosis (SL)
Mean ± SD 16.30 ± 6.52 22.23 ± 7.10 21.12 ± 6.50 20.70 ± 6.49 49.034‡  < 0.001(HS)
Median (range) 14.40 (4.2–30) 19 (14.8–38.9) 19.40 (13.9–38) 19.10 (13.9–37)
  1. *Repeated measures ANOVA test, ‡ Friedman's test
  2. S: Significant(P < 0.05); HS: Highly significant (P < 0.01)