Effect of programmed comprehensive nursing on delirium incidence in intensive care unit children following severe cardiac surgery

Table 2 Comparison of specific respiratory function parameters (mean ± SD)

Group	PEF (L/min)		Respiratory frequency (times /min)		Deep breath volume (L)		Tidal volume (L)
	Preoperative	Out of ICU	Preoperative	Out of ICU	Preoperative	Out of ICU	Preoperative	Out of ICU
Observation group (n = 90)	289.83 ± 24.84	251.20 ± 23.80a	18.71 ± 1.58	15.84 ± 1.02a	3.12 ± 0.48	2.80 ± 0.36a	0.58 ± 0.08	0.50 ± 0.06a
Control group (n = 90)	291.06 ± 26.02	225.84 ± 21.06a	18.60 ± 1.55	13.48 ± 1.08a	3.10 ± 0.50	2.31 ± 0.35a	0.57 ± 0.07	0.42 ± 0.05a
t value	0.324	7.570	0.471	15.071	0.275	9.258	0.892	9.717
P value	0.746	< 0.001	0.638	< 0.001	0.785	< 0.001	0.373	< 0.001

^aP < 0.05 compared with preoperative parameters in the same group.

ICU: Intensive care unit.