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Table 2 The Leiden Observer’s Assessment of Alertness and Sedation scale

From: Effect of variations in depth of neuromuscular blockade on rating of surgical conditions by surgeon and anesthesiologist in patients undergoing laparoscopic renal or prostatic surgery (BLISS trial): study protocol for a randomized controlled trial

0 Normal alertness, eyes open, responds normal to command
1 Drowsy with open eyes, closed and opened on command
2 Drowsy with closed eyes, opened in response to light auditory stimulus
3 Eyes closed, opened in response to rubbing the shoulder or a load auditory stimulus
4 Eyes closed and opened only briefly in response to touching the subject
5 Eyes closed, not aroused by touching the subject, aroused by a painful stimulus
6 Not aroused by a painful stimulus