Effect of Different Durations of Eye-Covering Pretreatment on Emergence Delirium after Ophthalmic Surgery in Preschool-Aged Children: A Randomized Controlled Study

Table 2

Differences in overall study outcomes between three groups.

Variables	C group (n = 76)	30-min group (n = 76)	60-min group (n = 72)	χ 2/H
Preoperative anxiety score (IQR)	50.00 (45.45, 63.63)	40.90 (31.81, 45.45)	40.90 (31.81, 50.00)	29.638^&	<0.001
Postoperative pain score (IQR)	0.00 (0.00, 0.00)	0.00 (0.00, 0.00)	0.00 (0.00, 0.00)	0.274^&	0.872
Postoperative ED score (IQR)	2.5 (2.00, 4.00)	1.0 (0.00, 2.00)	1.0 (0.00, 2.00)	44.785^&	<0.001
Incidence of ED (%)	59 (77.6)	20 (26.3)	25 (34.7)	46.078^#	<0.001

Data are n (%) unless otherwise stated. Percentages might not add to 100% due to rounding; IQR = interquartile range; #: Chi-square test used to calculate χ2 value; &: Kruskal–-Wallis test used to calculate H value.