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.
Myelopathy is a generally progressive condition that develops slowly. Cervical spinal stenosis symptoms with myelopathy may not progress for years, and then difficulties with coordination may suddenly increase. Unfortunately, the symptoms rarely improve without cervical stenosis surgery to decompress the affected area.ervical stenosis symptoms with myelopathy. People with cervical stenosis with myelopathy may note one or more of the following spinal stenosis symptoms: 1  Heavy feeling in the legs. 2  Inability to walk at a brisk pace. 3  Deterioration in fine motor skills (such as handwriting or buttoning a shirt).