Table 2:Summary of correlations.
A.|
Fisher correlations (p-values) |
||||||
|
EMG Result |
LSS |
LSS_sev |
LNS |
LNS_sev |
||
|
Radiculopathy |
0.50 |
0.54 |
0.69 |
0.11 |
||
|
Interrater reliability (k-values) |
||||||
|
Radiculopathy |
0.052 |
|
0.028 |
|
||
|
Multivariable logistic regression model |
|
|
p-value |
c-statistic |
|
0.76 |
0.61 |
(A) FFH (Fisher-Freeman-Halton) testing was performed. There were no statistically significant associations between evidence of radiculopathy on EMG and presence of LSS (p = 0.50), LSS_sev (p = 0.54), LNS (p = 0.69) or LNS_sev (p = 0.11). There were none to slight associations based on interrater reliability testing between evidence of radiculopathy on EMG and presence of LSS (k = 0.052) and LNS (k = 0.028); (B) Variables of LSS, LNS, LSS_sev, LNS_sev was fit to a multivariable logistic regression model to examine potential to predict evidence of radiculopathy on EMG. The model was not statistically significant (p = 0.76) and had poor model discrimination (c-statistic = 0.61).
Abbreviation: LSS: Lumbar Spinal Stenosis; LNS: Lumbar Neuroforaminal Stenosis; LSS_sev: Lumbar Spinal Stenosis Severity; LNS_sev: Lumbar Neuroforaminal Stenosis Severity