Psychometric Properties of the Modified Japanese Orthopaedic Association Scale in Patients With Cervical Spondylotic Myelopathy
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Bibliographic record
Abstract
In Brief Study Design. Prospective study. Objective. This study aims to determine the psychometric properties of the modified Japanese Orthopaedic Association (mJOA) scale. Summary of Background Data. Several outcome measures assess functional impairment and quality of life in patients with cervical myelopathy. However, a “gold standard” has not been established. One of the most widely accepted tools for assessing functional status is the mJOA scale. Methods. Two hundred and seventy-seven surgical patients with cervical spondylotic myelopathy were enrolled in the prospective cervical spondylotic myelopathy-North America study. Functional status was evaluated at baseline and at 6, 12, and 24 months postoperatively. The internal consistency of the mJOA was assessed by computing a Cronbach α for the total score and after removing 1 item at a time. Convergent validity and divergent validity were measured by correlating the mJOA with other assessment tools. The responsiveness of the scale was determined by comparing mJOA scores at baseline and 12 months after surgery and computing a Cohen effect size. Results. The internal consistency of the scale was moderate with a Cronbach α of 0.63. Sphincter dysfunction measured a different dimension than the other 3 scale components. The mJOA was correlated with the Nurick score (r =−0.625) but was not associated with subscales of the Short-Form 36 that measure different constructs. These findings suggest convergent and divergent validity. The mJOA was responsive to change as reflected by a Cohen effect size of 1. Conclusion. The mJOA is a useful tool in the assessment of cervical spondylotic myelopathy and it should be adopted as the standard for evaluating functional status in this population. Level of Evidence: 3 This study aims to determine the psychometric properties of the modified Japanese Orthopaedic Association score. The scale displayed convergent and divergent validity, had moderate internal consistency and was responsive to change. The modified Japanese Orthopaedic Association is a useful tool in assessing functional status in patients with cervical spondylotic myelopathy.
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Full frame distilled prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.
Codex and Gemma teacher scores by category
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.002 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.000 | 0.000 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from it