[Retracted] Nursing Research on Patients with Chronic Obstructive Pulmonary Disease and Respiratory Failure Based on Big Data

Table 2

Comparison of pulmonary function before and after the intervention.

Item	Intervention	CG	EG	t
FEV1/FVC	Before	55.97 ± 5.95	56.98 ± 6.59	−0.59	0.59
	After	55.66 ± 5.20	59.88 ± 6.13	−3.17	0.002