[Retracted] The Effects of Sequential Ventilation Therapy on Blood Gas Indexes, Pulmonary Function Indexes, Clinical Efficacy, and Safety in Patients with Severe Cor Pulmonale

Table 4

Lung function changes before and after treatment.

Group	n	FEV1 (%)		FEV1/FVC (%)		PEF (L/min)
		Before	After	Before	After	Before	After
Control group	48	53.45 ± 3.97	58.01 ± 4.34a	51.34 ± 4.18	58.16 ± 3.93a	260.19 ± 23.75	320.15 ± 30.24a
Study group	48	53.78 ± 3.98	67.26 ± 3.69a	52.05 ± 3.92	63.84 ± 4.25a	267.19 ± 24.44	397.05 ± 28.79a
T		−0.408	−11.247	−0.866	−6.790	−1.422	−12.761
		0.684	< 0.001	0.389	< 0.001	0.158	<0.001