Exclusion Criteria for 68 Patients Who Underwent Spinal Decompression and 68 Patients Who Had Total Hip Arthroplasty
| Age, yr |
| < 65 |
| > 80 |
| Previous surgery |
| Spinal decompression |
| Hip surgery |
| Emergency procedures |
| Hip fractures |
| Spine fractures |
| Cauda equina syndrome |
| Bone disease |
| Primary or secondary bone |
| Metastatic |