Study on the efficacy of early treatment with pirfenidone on the lung function of patients with idiopathic pulmonary fibrosis

Table 6 Comparison of the 6-min walking distance between the two groups of patients before and after therapy

Group	Number of cases	Before treatment	After treatment
Observation group	60	397.77 ± 30.22	420.69 ± 20.31
Later treatment group	55	398.21 ± 30.16	410.35 ± 21.67
Control group	53	398.61 ± 30.21	406.66 ± 23.33
F value		0.34	7.44
P value		0.711	0.001