Japan Coma Scale for grading of impaired consciousness19
| Grade | Consciousness level |
|---|---|
| 1-digit code | The patient is awake without any stimuli, and is: |
| 1 | Almost fully conscious |
| 2 | Unable to recognise time, place and person |
| 3 | Unable to recall name or date of birth |
| 2-digit code | The patient can be aroused (then reverts to previous state after cessation of stimulation): |
| 10 | Easily by being spoken to (or is responsive with purposeful movements, phrases, or words)* |
| 20 | With loud voice or shaking of shoulders (or is almost always responsive to very simple words like yes or no, or to movements)* |
| 30 | Only by repeated mechanical stimuli |
| 3-digit code | The patient cannot be aroused with any forceful mechanical stimuli, and: |
| 100 | Responds with movements to avoid the stimulus |
| 200 | Responds with slight movements including decerebrate and decorticate posture |
| 300 | Does not respond at all except for change of respiratory rhythm |
‘R’ and ‘I’ are added to the grade to indicate restlessness and incontinence of urine and faeces, respectively: for example; 100-R and 30-RI.
*Criteria in parentheses are used in patients who cannot open their eyes for any reason.