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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