Table 2.

Incidence of emergence agitation

	Group Alf2 (n = 57)	Group Alf4 (n = 57)	Group Sal (n = 58)
PAED score	6.4 (3.5)†	5.8 (3.8)†	9.6 (5.1)†
PAED score vs group Sal (95% CI)	3.218 (1.368–5.068)	3.797 (1.947–5.647)	–
P value	< 0.01	< 0.01	–
PAED > 10	13 (22.9%)*	12 (21.1%)*	28 (48.3%)*
PAED vs group Sal (95% CI)	0.317 (0.142–0.708)	0.286 (0.126–0.647)	–
P value	< 0.01	< 0.01	–
Aono’s score ≥ 3	13 (22.8%)‡	13 (22.8%)‡	28 (48.3%)‡
Aono’s score vs group Sal (95% CI)	0.317 (0.142–0.708)	0.317 (0.142–0.708)
P value	< 0.01	< 0.01	–

Alf2 0.2 μg/kg/min alfentanil, Alf4 0.4 μg/kg/min alfentanil, CI confidence interval, PAED Paediatric Anaesthesia Emergence Delirium, Sal saline

^*The incidence of emergence agitation in Group Sal was significantly higher than other two groups (P < 0.05)

^†There were no significant differences between Groups Alf2 and Alf4, the PAED score of GroupAlf2 and Alf4 was significantly lower than that of Groups Sal (P < 0.05)

^‡The aono’s scores in Group Sal was significantly higher than other two groups (P < 0.05)