From: Determining the effective dose of esketamine for mitigating pain during propofol injection by Dixon’s up-and-down method: a double-blind, prospective clinical study of drug dose response
Group
Number of cases
Age (yr)
Weight (kg)
BMI (kg/m2)
ASA (I/II cases)
Effective
14
36.4 ± 9.0
57.3 ± 5.8
22.1 ± 1.6
10/4
Ineffective
11
34.5 ± 6.7
56.7 ± 5.7
22.5 ± 1.0
8/3