[Retracted] Effect of High-Quality Nursing Care on Patients with Acute Exacerbation of Chronic Obstructive Pulmonary Disease Complicated with Respiratory Failure: An Observational Cohort Study

Table 2

Comparison of lung function indexes between the two groups after treatment.

Index	Time	Observation group ()	Control group ()
FEV1 (L)	Before treatment			1.643	0.318
	After treatment			4.253	0.003
		4.216	3.214	—	—
		0.037	0.038	—	—
FVC (L)	Before treatment			0.874	0.318
	After treatment			7.954	0.001
		4.328	3.116	—	—
		0.001	0.002	—	—
FEV1/FVC (%)	Before treatment			0.785	0.312
	After treatment			8.294	0.001
		8.728	6.146	—	—
		0.001	0.003	—	—

Note: significant difference “” as and “ as ”.