Table 3.

Comparison of lung function between the two groups ($\overline{x}\pm s$).

Group	FEV1(L)		FVC(L)		FEV1/FVC(%)
	Before nursing	After nursing	Before nursing	After nursing	Before nursing	After nursing
Control group (n = 60)	1.32 ± 0.24	1.72 ± 0.25	1.97 ± 0.22	2.32 ± 0.25	66.14 ± 5.62	72.61 ± 4.91
Study group (n = 60)	1.33 ± 0.21	2.46 ± 0.16	1.99 ± 0.19	2.85 ± 0.31	66.21 ± 5.49	76.84 ± 5.04
t	0.243	19.310	0.533	10.310	0.069	4.657
P	0.809	0.001	0.595	0.001	0.945	0.001