Table 1.

Characteristics of patients (N = 42).

Characteristics	Mean (SD)	Range	Median
Age, years	40.8 (9.7)	24-57	41.0
Weight, kg	61.0 (10.1)	45-85	59.5
Height, cm	161.0 (6.0)	148-174	161.0
Body mass index, kg m-2	23.5 (3.6)	17.6-32.0	23.0
Fentanyl, mcg kg-1	2.5 (0.8)	1.4-4.6	2.4
Duration of anesthesia, min	127.9 (44.0)	60-256	122
Time to eye opening, min	5.2 (1.6)	3-10	5