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Table 2 Estimated marginal means of intervertebral disc height for each grade of disc degeneration

From: A Dose–response relationship between severity of disc degeneration and intervertebral disc height in the lumbosacral spine

  Intervertebral disc height in mm for each grade of disc degeneration
  2 3 4 5 P a P b
L1/2 10.1 (0.2) 8.9 (0.3) 9.0 (1.0) 3.0 (1.4) <0.001 0.01
L2/3 12.0 (0.3) 10.5 (0.3) 9.3 (0.6) - 0.001 0.001
L3/4 13.2 (0.4) 11.4 (0.3) 10.1 (0.6) 5.1 (2.0) <0.001 0.001
L4/5 13.2 (0.7) 11.5 (0.4) 10.3 (0.5) 4.2 (2.4) 0.003 0.02
L5/S1 11.4 (0.6) 10.5 (0.6) 9.0 (0.6) 4.3 (1.5) <0.001 0.03
  1. Estimated marginal means (standard error of the mean) adjusted for age, gender, body mass index and smoking history (past/present or never). P values for F test for pairwise comparison. aComparisons made for intervertebral disc height for grades 2 to 5. bComparisons made for intervertebral disc height for grades 2 to 4