Table 1:Characterization of lumbar stenosis.
|
Severity Grade |
LSS |
LSS% |
LNS |
LNS% |
|
0 |
67 |
61.5 |
23 |
21.1 |
|
1 |
24 |
22.0 |
33 |
30.3 |
|
2 |
2 |
1.8 |
4 |
3.7 |
|
3 |
8 |
7.3 |
24 |
22.0 |
|
4 |
0 |
0 |
5 |
4.6 |
|
5 |
8 |
7.3 |
20 |
18.3 |
|
Total |
42 |
38.5 |
86 |
78.9 |
The 109 selected patients were further characterized based on degree of LSS and LNS. 42 (38.5%) total patients had evidence of LSS on MRI. Of these, 8 patients were characterized as severe (7.3%), 0 patients were moderate/severe, 8 patients were moderate (7.3%), 2 patients were mild/moderate (1.8%), and 24 patients were mild (22.0%) in terms of LSS severity. 86 (78.9%) patients had evidence of LNS on MRI. Of these, 20 patients were characterized as severe (18.3%), 5 patients were moderate/severe (4.6%), 24 patients were moderate (22.0%), 4 patients were mild/moderate (3.7%), and 33 patients were mild (30.3%) in terms of LNS severity. 67 (61.5%) patients had no evidence of LSS on MRI and 23 (21.1%) patients had no evidence of LNS on MRI.
Abbreviation: Severity Grading: 0 = none, 1 = mild, 2 = mild/moderate, 3 = moderate, 4 = moderate/severe, 5 = severe; LSS: Lumbar Spinal Stenosis; LNS = Lumbar Neuroforaminal Stenosis