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. 2021 May 15;13(5):4686–4695.

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Comparison of pulmonary function between the two groups. A. Before nursing, there was no notable difference between the two groups in FEV1, while after nursing, FEV1 of both groups increased significantly, and FEV1 of the research group was significantly higher than that of the control group. B. Before nursing, there was no notable difference between the two groups in FVC, while after nursing, FVC of both groups increased significantly, and FVC of the research group was significantly higher than that of the control group. C. Before nursing, there was no notable difference between the two groups in FEV1/FVC, while after nursing, FEV1/FVC of both groups increased significantly, and FEV1/FVC of the research group was significantly higher than that of the control group. Note: *** indicates P<0.001.