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Table 2 Internal consistency and test–retest reliability of JOACEMQ subscale

From: Japanese Orthopaedic Association Cervical Myelopathy Evaluation Questionnaire (JOACMEQ) in mainland China: an investigation of reliability, validity, and responsiveness

  Item Cronbach's α First test Retest correlation coefficient
Cervical spine function 4 0.728 79.01 ± 16.35 78.23 ± 16.78 0.758
Upper extremity function 3 0.519 83.49 ± 16.10 81.33 ± 17.23 0.773
Lower extremity function 5 0.894 73.24 ± 14.51 74.32 ± 16.21 0.905
Bladder function 4 0.568 80.48 ± 14.84 80.28 ± 15.67 0.695
Quality of life 8 0.886 50.69 ± 16.39 52.10 ± 15.66 0.796
Totala 24 0.897    
  1. aWe count ‘Total’ for the use of the calculation of Cronbach’s α co-efficient (here ‘Total’ means all categories of JOACMEQ). During the clinical application, we don’t use total score for evaluation, and it’s meaningless to add scores of each item