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Table 1 Japan Coma Scale for grading impaired consciousness

From: An association between systolic blood pressure and stroke among patients with impaired consciousness in out-of-hospital emergency settings

Mild disturbance:
The patient is awake without any stimuli, and is
1. Almost completely conscious,
2. Unable to recognize time, place and person,
3. Unable to recall name and date of birth.
Moderate disturbance:
The patient can be aroused
10. Easily by being spoken to,
*(responsive with purposeful movements, phrases, or word)
20. With loud voice or shaking the shoulders,
*(almost steadily responsive with very simple words-yes or no, or movements)
30. Only by repeated mechanical stimuli.
Then, the patient falls into the previous state by cessation of stimulation.
Severe disturbance:
The patient cannot be aroused by any forceful mechanical noise stimuli, and
100. Responds with movements to avoid the stimulus,
200. Responds with slight movements including decerebrate and decorticate postures,
300. Does not respond at all except for change in respiratory rhythm.
  1. *Used in patients who cannot open their eyes for any reason.
  2. This table was revised from Reference [5].