Table 1 Demographic data for patients in derivation study 1
LSS (n = 137) | LDH (n = 97) | |
|---|---|---|
Male (%) | 46 | 58 |
Female (%) | 54 | 42 |
Mean age (yr) | 68 | 41 |
Mean duration of symptoms (mo) | 21 | 5 |
Cauda equina type intermittent claudication | 50 | - |
Radicular type intermittent claudication | 87 | - |
Findings on MRI | ||
One level stenosis | 102 | 14 |
Two level stenosis | 23 | 0 |
Three level stenosis | 12 | 0 |