Hack 2014 H-Impairment Index (HII). Five caller-assigned bedside tasks (gross motor, mentation and speech, tracing curve, nystagmus, finger-to-nose), each integer 0-4. HII is completed-sum / (4 × completed tasks); denominator 20 if all five; range 0-1. Omit a task that was not attempted. Serial decline is not modeled. Does not take blood alcohol concentration. Not a diagnosis, discharge order, or legal sobriety test. magent does not examine the patient.

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