“…The JCS is a 1-axis coma scale, published in 1974 and widely used in Japan, 8,9 and consists of 4 categories with each digit code having 3 subcategories (1, 2, and 3 in the 1-digit code; 10, 20, and 30 in the 2-digit code; and 100, 200, and 300 in the 3-digit code). JCS 0 indicates that patients have alert consciousness; JCS 1-digit codes (1)(2)(3) indicate that patients are not fully alert, but awake without any stimuli; JCS 2-digit codes (10-30) indicate that patients are arousable with stimulation; and JCS 3-digit codes (100-300) indicate coma. 10 In the present study, we divided the patients into 4 categories: alert, JCS 0; awake, JCS 1-3; arousable, JCS 10-30; and coma, JCS 100-300.…”