Table 3: Type and Frequency of Prior Lumbar Spinal Fusion and Lumbar Pathology Managed Conservatively

Type of Surgery Frequency
General frequency
  Single level fusion 4
  Multi-level fusion 11
  Hip replacement surgery 1
Specific frequency
  L3-L5 1
  L4/5 1
  L3-S1 1
  L4-S1 9
  L5-S1 3