A six grade system (0-5) based on the 'difficulty in walking'.
Classification Scheme: * Grade 0: signs or symptoms of root involvement but without evidence of spinal cord disease * Grade 1: signs of spinal cord disease but no difficulty in walking. * Grade 2: slight difficulty in walking which does not prevent full-time employment * Grade 3: difficulty in walking which prevented full time employment or the
ability to do all housework, but which was not so severe as to require
someone else's help to walk * Grade 4: able to walk only with someone else's help or with the aid of a frame. * Grade 5 : chairbound or bedridden.
Source Article: Nurick S. The pathogenesis of the spinal cord disorder associated with cervical spondylosis. Brain. 95:87-100 (1972)
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