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Table 4 Correlation of surgical ligamentum flavum thickness and area of fibrosis (%) at L4-5 and L5-S1

From: The paradoxical relationship between ligamentum flavum hypertrophy and developmental lumbar spinal stenosis

  L4-L5
r-value
p-value 95 % CI L5-S1
r-value
p-value 95 % CI
Group 1 R: -0.49 R: 0.002 R: -66.27–-22.21 R: -1.00 R: 0.25 R: -191.75–131.49
Lt: -0.30 L: <0.001* L: -68.79–-37.32 L: -1.00 L: 0.065 L: -125.74–16.82
Group 2 Rt: -0.56 R: <0.001* R: -57.39–-30.52 R: -0.41 R: 0.001 R: -56.30–-23.24
L: -0.51 L: <0.001* L: -52.02–-26.23 L: -0.53 L: 0.002 L: -72.38–-23.92
Group 3 n(1)    R: 0.95 R: 0.047 R: -111.05–-2.00
L: 0.85 L: 0.085 L: -116.13–-17.05
  1. LF ligamentum flavum, CI confidence onterval, %: percentage, r: correlation coefficient, * significant p-value, Rt right, Lt left