Reviewers graded each of the MRI and CT scan as normal or abnormal on 3 separate occasions and if the facet was abnormal, each reviewer graded the degree of arthrosis.

在三个互不相关的时间评估者将每个CT扫描和MRI分级为正常或异常，如果小关节是异常的，每个评估者对关节炎的病变程度进行分级。