Table 3.

Comparison of respiratory function between the 2 groups (X ± SD, mm Hg).

Group	n	PaO2		PaCO2		SpO2
		Before nursing	After nursing	Before nursing	After nursing	Before nursing	After nursing
Observation group	55	51.10 ± 6.70	77.30 ± 8.70	33.50 ± 1.20	31.20 ± 1.30	82.80 ± 5.50	95.50 ± 3.30
Control group	55	51.60 ± 7.00	65.90 ± 9.10	33.60 ± 1.90	34.40 ± 1.50	83.50 ± 4.90	87.80 ± 4.10
t		−0.382	6.710	−0.327	−7.110	−0.706	10.820
P		.703	<.001	.744	<.001	.481	<.001

SD = standard deviation.