TABLE 1.

Baseline characteristics of two groups

Group	Age	Gender	Height	Weight	ASA	Operating time
	(year)	(M/F)	(cm)	(kg)	(I/II)	(min)
Group C (n = 59)	2.42 ± 1.49	43/16	92.37 ± 12.45	14.14 ± 4.36	37/22	93.00 (64.00–130.00)
Group O (n = 60)	2.43 ± 1.49	47/13	92.53 ± 12.93	13.61 ± 3.60	35/25	85.85 (63.50–138.75)
χ 2 /t/Z	0.086	0.480	−0.053	0.644	0.239	0.320
P	0.932	0.489	0.958	0.520	0.625	0.750

Data are shown as n or mean ± standard deviation or median (interquartile range).

Abbreviations: ASA, American Society of Anesthesiologists; F, female; Group C, closed‐loop feedback group; Group O, open‐loop manual control group; M, male.