Table 4 Comparison of lung function levels of two groups (\(\overline{x} \pm s\))

The control group (n = 78)

1.26 ± 0.30

1.52 ± 0.33^*

2.64 ± 0.58

3.02 ± 0.79^*

48.56 ± 4.58

50.36 ± 4.98^*

The observation group (n = 80)

1.27 ± 0.29

1.81 ± 0.38^*

2.59 ± 0.62

3.42 ± 0.80^*

49.02 ± 4.29

58.56 ± 5.25^*

t value

0.213

5.117

0.523

3.162

0.652

10.068

P value

0.832

 < 0.001

0.602

0.002

0.516

 < 0.001