Table 2.

Comparison of propofol dosage and awakening time among groups

Item	Group R2	Group R4	Group R6	P value
Average propofol dosage, μg/mL	2.6 ± 0.6	2.2 ± 0.6**	2.1 ± 0.5**	0.001
Awakening time, min	3.1 ± 1.1	2.4 ± 1.2*	2.5 ± 1.2*	0.025

Compared with group R2, ^*P <0.05, ^**P <0.01