Fig. 1From: Cervical degenerative index: a new quantitative radiographic scoring system for cervical spondylosis with interobserver and intraobserver reliability testingIn this patient, we see the different grading scales for disc space narrowing rated by one observer as C2/3 = 0, C6/7 = 1, C4/5 = 2, C5/6 = 2, and C3/4 = 3Back to article page