Mediator Variable vs Moderator Variable. There is often confusion among students concerning the difference between a mediator variable and a moderator variable. The explanation involves some concepts that haven't been introduced at this point but it can still be worthwhile to discuss these types of variables.n analysis of variance (ANOVA) terms, a moderator effect can be represented as an interaction between a major independent variable and a factor that specifies the appropriate conditions for its operation, that is, the effect of the major independent variable depends upon the value of the moderator variable.
The most common form of myelopathy in human, cervical spondylotic myelopathy (CSM), is caused by arthritic changes (spondylosis) of the cervical spine, which result in narrowing of the spinal canal (spinal stenosis) ultimately causing compression of the spinal cord.
The symptoms of lumbar stenosis generally develop slowly over time (most patients are over 50) and symptoms may come and go. Lumbar stenosis symptoms may include: 1  Leg pain (sciatica). 2  Leg pain with walking (claudication). 3  Tingling, weakness or numbness that radiates from the lower back into the buttocks and legs.pinal Stenosis Symptoms and Diagnosis Video. The typical symptom is increased pain in the legs with walking (pseudoclaudication), which can markedly diminish one's activity level. Patients with lumbar spinal stenosis are typically comfortable at rest but cannot walk far without developing leg pain.