Table 2.

Postoperative analgesia and consumption of sufentanil in the 4 groups.

Group	Effective press (times)*	Consumption of sufentanil (μg)*	Rescue analgesia [n (%)]†
Group H (n = 39)	1.6 ± 0.6‡,§,‖	60.6 ± 1.2‡,§,‖	1 (2.6)‡
Group M (n = 40)	2.9 ± 0.7‡,§	63.4 ± 3.8‡,§	2 (5.0)‡
Group L (n = 38)	4.1 ± 0.8‡	66.8 ± 5.1‡	2 (5.3)‡
Group C (n = 39)	5.4 ± 1.0	72.0 ± 4.4	9 (23.1)
P value	.002	.006	.004

^*Values are presented as mean ± SD, mutual comparison by single factor variance analysis (one-way ANOVA). Fisher’s least significant difference (LSD) test was used to do pairwise comparison between groups.

^†Values are presented as n (%), mutual comparison by χ² test.

^‡Compared with Group C, P <  .05.

^§Compared with Group L, P < .05.

^‖Compared with Group M, P < .05.