1 Before you use it
What it is
A clinician-rated severity score for cervical myelopathy and lumbar stenosis, combining upper-limb motor function, lower-limb motor function, sensory function and bladder function.
The modified JOA (mJOA) removes the culturally-specific chopstick item and is the version now generally used.
When to reach for it
Suspected cervical myelopathy, and lumbar spinal canal stenosis with neurological features.
Bladder involvement is a red flag, not a score item, when it is new. If that domain is abnormal and recent, escalate rather than score.
2 Giving it
Scoring
Cervical JOA runs 0–17; higher is better. Domains are scored by examination and history, not by questionnaire.
Specify which version you used. JOA, mJOA and the lumbar version are different instruments with different ranges.
What it doesn’t measure
It does not image, it does not localise a level, and it does not decide surgery. It quantifies severity for someone who will.
3 Reading the score
Interpreting it
Lower scores mean more severe neurological compromise.
On placement its value is as a structure, not a score: it forces you to examine upper limb, lower limb, sensation and bladder — which is exactly the examination a myelopathy screen needs and exactly the one that gets shortened.
Is the change real?
Student trap. Scoring the bladder item and moving on. New bladder change in this context is an escalation, not a data point.
Official source: pmc.ncbi.nlm.nih.gov. We don't host the form.
This is a learning tool. It does not diagnose patients and does not replace your clinical educator.
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