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Table 3 Comparisons of spinopelvic parameters and LDI in the different groups

From: Relationship between postoperative lordosis distribution index and adjacent segment disease following L4-S1 posterior lumbar interbody fusion

 TotalASDNon-ASDP
PI (°)54.13 ± 9.5755.49 ± 8.2253.26 ± 7.130.251
Pre LL (°)38.71 ± 6.9637.17 ± 7.3138.85 ± 6.930.341
Pre LLL (°)25.22 ± 4.8223.71 ± 4.5525.36 ± 4.830.177
Pre LDI0.66 (0.60–0.71)0.65 ± 0.110.66 (0.60–0.71)0.682
Pre LDI group (low LDI, moderate LDI, high LDI), n (%)0.252
 Low LDI < 0.513 (6.5)2 (11.8)11 (6.0) 
 0.5 ≤ moderate LDI ≤ 0.8172 (86.0)13 (76.4)159 (86.9) 
 High LDI > 0.815 (7.5)2 (11.8)13 (7.1) 
Pre LDI group (normal LDI, abnormal LDI ) n (%)0.267
0.5 ≤ normal LDI ≤ 0.8172 (86.0)13 (76.5)159 (86.9) 
 Abnormal LDI (< 0.5, > 0.8)36 (14.0)4 (23.5)24 (13.1) 
Post LL (°)42.67 ± 8.5140.35 ± 7.9642.88 ± 8.550.241
Post LLL (°)28.82 ± 5.9027.69 ± 5.6828.93 ± 5.930.410
Post LDI0.69 ± 0.130.71 ± 0.190.68 ± 0.120.578
Post LDI group (low LDI, moderate LDI, high LDI), n (%)0.001
 Low LDI < 0.516 (8.0)4 (23.5)12 (6.6) 
 0.5 ≤ moderate LDI ≤ 0.8146 (73.0)6 (35.3)140 (76.5) 
 High LDI > 0.838 (19.0)7 (41.2)31 (16.9) 
Post LDI group (normal LDI, abnormal LDI) n (%)0.001
 0.5 ≤ normal LDI ≤ 0.8146 (73.0)6 (35.3)140 (76.5) 
 Abnormal LDI(< 0.5, > 0.8)54 (27.0)11 (64.7)43 (23.5) 
  1. Independent-samples t tests, Mann-Whitney U test, Pearson χ2 test, Fisher’s exact test
  2. ASD adjacent segment disease, LL lumbar lordosis, LLL lower lumbar lordosis, LDI lordosis distribution index