Table 2.

Data are presented as numbers of patients who suffered POST at immediate extubation, 2 h, 24 h after extubation

Group	n	Immediate extubation				2 h after extubation				24 h after extubation
		0	1	2	3	0	1	2	3	0	1	2	3
Control	84	51	22	9	2	44	27	11	2	45	31	5	3
Experiment	83	77	6	0	0	70	10	3	0	69	12	2	0
Ζ		−4.98				−4.462				−4.124
p-value		0.000				0.000				0.000

(1) none; (2) mild (less than a common cold); (3) moderate (similar to a common cold); and (4) severe (more than a common cold)