Table 1. Lung function before and after treatment by 6 months.

	Pre-therapy (x̄±s*)	Post-therapy (x̄±s*)	t	P value
FEV1.0%	56.28±5.73	80.44±7.12	–9.688	<0.001
FEV1.0/FVC	59.41±5.86	75.75±5.34	–3.071	0.007
FEF75%	39.56±6.16	53.33±3.55	–8.175	<0.001
RV/TLC	52.28±3.58	46.17±4.06	4.035	0.01

x̄±s*: mean ± standard deviation (SD).