The Young Mania Rating Scale (YMRS) is an 11-item clinician-administered scale used to measure the severity of manic symptoms. The scale should be administered by a clinician with clinical experience in bipolar disorder. The rating of each item is based on the patient's subjective report of their condition over the past 48 hours and the clinician's observations during the interview. For each item, select the rating that best characterizes the patient. Note: Items 5, 6, 8, and 9 are graded on a 0 to 8 scale (instead of 0 to 4), with 0, 2, 4, 6, and 8 being the only valid scores.