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

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

	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
Total^a	24	0.897

^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

ISSN: 1477-7525